Entity Central Index Key
Business combination recognized identifiable assets acquired and liabilities assumed fair value of debt acquired.
Business combination recognized identifiable assets acquired and liabilities assumed purchase price.
Business combination recognized identifiable assets acquired and liabilities assumed Acquisition costs.
The aggregate costs related to goods produced and sold and services rendered by an entity during the reporting period and reversal of a prior year accrual.
Cover [Abstract]
Document Type
Document Type
Amendment Flag
Amendment Flag
Document Period End Date
Document Period End Date
Document Fiscal Year Focus
Document Fiscal Year Focus
Document Fiscal Period Focus
Document Fiscal Period Focus
Trading Symbol
Trading Symbol
Entity Registrant Name
Entity Registrant Name
Entity Central Index Key
Current Fiscal Year End Date
Current Fiscal Year End Date
Entity Current Reporting Status
Entity Current Reporting Status
Entity Interactive Data Current
Entity Interactive Data Current
Entity Filer Category
Entity Filer Category
Entity Small Business
Entity Small Business
Entity Emerging Growth Company
Entity Emerging Growth Company
ICFR Auditor Attestation Flag
Icfr Auditor Attestation Flag
Entity Ex Transition Period
Entity Ex Transition Period
Entity Shell Company
Entity Shell Company
Title of 12(b) Security
Security12b Title
Security Exchange Name
Security Exchange Name
Entity File Number
Entity File Number
Entity Incorporation, State or Country Code
Entity Incorporation State Country Code
Entity Tax Identification Number
Entity Tax Identification Number
Entity Address, Address Line One
Entity Address Address Line1
Entity Address, Address Line Two
Entity Address Address Line2
Entity Address, City or Town
Entity Address City Or Town
Entity Address, State or Province
Entity Address State Or Province
Entity Address, Postal Zip Code
Entity Address Postal Zip Code
City Area Code
City Area Code
Local Phone Number
Local Phone Number
Document Annual Report
Document Annual Report
Document Transition Report
Document Transition Report
Entity Common Stock, Shares Outstanding
Entity Common Stock Shares Outstanding
Entity Public Float
Entity Public Float
Entity Well-known Seasoned Issuer
Entity Well Known Seasoned Issuer
Entity Voluntary Filers
Entity Voluntary Filers
Amount after accumulated depreciation, depletion and amortization of physical assets, excluding construction in progress, used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures.
Amount of construction reserve funds as of the balance sheet date.
Recourse long term debt current.
Non-recourse long term debt current.
Carrying value as of the balance sheet date of obligations incurred through that date and payable for capital, repair and maintenance expenditures. Used to reflect the current portion of the liabilities (due within one year or within the normal operating cycle if longer).
Recourse long term debt noncurrent.
Non-recourse long term debt noncurrent.
Statement Of Financial Position [Abstract]
ASSETS
Assets [Abstract]
Current Assets:
Assets Current [Abstract]
Cash and cash equivalents
Cash And Cash Equivalents At Carrying Value
Restricted cash
Restricted Cash And Cash Equivalents
Receivables:
Receivables [Abstract]
Trade, net of allowance for credit loss reserve of $582 and $455 in 2020 and 2019, respectively
Accounts Receivable Net Current
Other
Other Receivables Net Current
Receivables from SEACOR Holdings
Due From Affiliate Current
Tax Receivable
Income Taxes Receivable
Inventories
Inventory Net
Prepaid expenses and other
Prepaid Expense And Other Assets Current
Assets held for sale
Assets Of Disposal Group Including Discontinued Operation Current
Total current assets
Assets Current
Property and Equipment:
Property Plant And Equipment [Abstract]
Historical cost
Property Plant And Equipment Gross
Accumulated depreciation
Accumulated Depreciation Depletion And Amortization Property Plant And Equipment
Property and equipment
Property Plant And Equipment Excluding Construction In Progress
Construction in progress
Construction In Progress Gross
Net property and equipment
Property Plant And Equipment Net
Right-of-Use Asset - Operating Leases
Operating Lease Right Of Use Asset
Right-of-Use Asset - Finance Leases
Finance Lease Right Of Use Asset
Investments, at Equity, and Advances to 50% or Less Owned Companies
Investments In Affiliates Subsidiaries Associates And Joint Ventures
Construction Reserve Funds
Construction Reserve Funds
Other Assets
Other Assets Noncurrent
Total assets
Assets
LIABILITIES AND EQUITY
Liabilities And Stockholders Equity [Abstract]
Current Liabilities:
Liabilities Current [Abstract]
Current portion of operating lease liabilities
Operating Lease Liability Current
Current portion of finance lease liabilities
Finance Lease Liability Current
Current portion of long-term debt
Long Term Debt Current [Abstract]
Recourse
Recourse Long Term Debt Current
Non Recourse
Non Recourse Long Term Debt Current
Accounts payable and accrued expenses
Accounts Payable And Accrued Liabilities Current
Due to SEACOR Holdings
Due To Affiliate Current
Accrued wages and benefits
Employee Related Liabilities Current
Accrued interest
Interest And Dividends Payable Current
Accrued capital, repair and maintenance expenditures
Accrued Capital Repair And Maintenance Expenditures Current
Deferred and Unearned revenues
Contract With Customer Liability Current
Accrued insurance deductibles and premiums
Accrued Insurance Current
Accrued professional fees
Accrued Professional Fees Current
Derivatives
Derivative Liabilities Current
Other current liabilities
Other Liabilities Current
Liabilities associated with assets held for sale
Liabilities Of Disposal Group Including Discontinued Operation Current
Total current liabilities
Liabilities Current
Long-Term Operating Lease Liabilities
Operating Lease Liability Noncurrent
Long-Term Finance Lease Liabilities
Finance Lease Liability Noncurrent
Long-Term Debt
Long Term Debt Noncurrent [Abstract]
Recourse
Recourse Long Term Debt Noncurrent
Non Recourse
Non Recourse Long Term Debt Noncurrent
Conversion Option Liability on Convertible Senior Notes
Derivative Liabilities Noncurrent
Deferred Income Taxes
Deferred Income Tax Liabilities Net
Deferred Gains and Other Liabilities
Other Liabilities Noncurrent
Total liabilities
Liabilities
Equity:
Stockholders Equity Including Portion Attributable To Noncontrolling Interest [Abstract]
SEACOR Marine Holdings Inc. stockholders' equity:
Stockholders Equity [Abstract]
Preferred stock, $.01 par value, 10,000,000 shares authorized; none issued nor outstanding
Preferred Stock Value
Common stock, $.01 par value, 60,000,000 shares authorized; 23,504,050 and 21,928,674 shares issued in 2020 and 2019, respectively
Common Stock Value
Additional paid-in capital
Additional Paid In Capital Common Stock
Retained earnings
Retained Earnings Accumulated Deficit
Shares held in treasury of 73,284 and 47,185 in 2020 and 2019, respectively, at cost
Treasury Stock Value
Accumulated other comprehensive loss, net of tax
Accumulated Other Comprehensive Income Loss Net Of Tax
Total stockholders equity
Stockholders Equity
Noncontrolling interests in subsidiaries
Minority Interest
Total equity
Stockholders Equity Including Portion Attributable To Noncontrolling Interest
Total liabilities and equity
Liabilities And Stockholders Equity
Trade receivables, allowance for credit loss
Allowance For Doubtful Accounts Receivable Current
Preferred stock, par value (in dollars per share)
Preferred Stock Par Or Stated Value Per Share
Preferred stock, shares authorized (in shares)
Preferred Stock Shares Authorized
Preferred stock, shares issued (in shares)
Preferred Stock Shares Issued
Preferred stock, shares outstanding (in shares)
Preferred Stock Shares Outstanding
Common stock, par value (in dollars per share)
Common Stock Par Or Stated Value Per Share
Common stock, shares authorized (in shares)
Common Stock Shares Authorized
Common stock, shares issued (in shares)
Common Stock Shares Issued
Shares held in treasury (in shares)
Treasury Stock Shares
Amount of lease expense not specifice to general day to day operations.
Amount of guarantee fees attributable to a related party.
Amount of income (loss) from continuing operations before income (loss) from equity method investments and income (loss) attributable to noncontrolling interest, but after tax of income (loss) from continuing operations.
Income Statement [Abstract]
Operating Revenues
Revenue From Contract With Customer Including Assessed Tax
Costs and Expenses:
Costs And Expenses [Abstract]
Operating
Operating Costs And Expenses
Administrative and general
General And Administrative Expense
Lease expense
Lease Expense
Depreciation and amortization
Depreciation Depletion And Amortization
Costs and expenses
Costs And Expenses
Losses on Asset Dispositions and Impairments, Net
Gain Loss On Sales Of Assets And Asset Impairment Charges
Operating Loss
Operating Income Loss
Other Income (Expense):
Nonoperating Income Expense [Abstract]
Interest income
Investment Income Interest
Interest expense
Interest Expense
SEACOR Holdings guarantee fees
Guarantee Fees Related Party
Loss on Debt Extinguishment
Gains Losses On Extinguishment Of Debt
Derivative gains, net
Gain Loss On Derivative Instruments Net Pretax
Foreign currency losses, net
Foreign Currency Transaction Gain Loss Before Tax
Other, net
Other Nonoperating Income Expense
Nonoperating income expense
Nonoperating Income Expense
Loss from Continuing Operations Before Tax Benefit and Equity in Losses of 50% or Less Owned Companies
Income Loss From Continuing Operations Before Income Taxes Minority Interest And Income Loss From Equity Method Investments
Income Tax (Benefit) Expense:
Income Tax Expense Benefit Continuing Operations [Abstract]
Current
Current Income Tax Expense Benefit
Deferred
Deferred Income Tax Expense Benefit
Income Tax (Benefit) Expense
Income Tax Expense Benefit
Loss Before Equity in Losses of 50% or Less Owned Companies
Income Loss From Continuing Operations Before Equity Method Investments And Noncontrolling Interest After Tax
Equity in Losses of 50% or Less Owned Companies, Net of Tax
Income Loss From Equity Method Investments
Loss from Continuing Operations
Income Loss From Continuing Operations
Income (Loss) on Discontinued Operations, Net of Tax
Income Loss From Discontinued Operations Net Of Tax
Net Loss
Profit Loss
Net Loss attributable to Noncontrolling Interests in Subsidiaries
Net Income Loss Attributable To Noncontrolling Interest
Net Loss attributable to SEACOR Marine Holdings Inc.
Net Income Loss
Basic and Diluted (Loss) Income Per Common Share and Warrants of SEACOR Marine Holdings Inc.
Earnings Per Share Basic And Diluted [Abstract]
Continuing operations
Income Loss From Continuing Operations Per Basic And Diluted Share
Discontinued operations
Income Loss From Discontinued Operations Net Of Tax Per Basic And Diluted Share
Basic and Diluted Income (Loss) Per Common Share and Warrants
Earnings Per Share Basic And Diluted
Weighted Average Common Shares and Warrants Outstanding:
Weighted Average Number Of Shares Outstanding [Abstract]
Basic and diluted shares
Weighted Average Number Of Share Outstanding Basic And Diluted
Statement Of Income And Comprehensive Income [Abstract]
Statement [Table]
Statement [Table]
Income Statement Location
Income Statement Location [Axis]
Income Statement Location
Income Statement Location [Domain]
Interest Expense
Interest Expense [Member]
Primary financial statement caption encompassing equity method investments.
Equity Method Investments
Equity Method Investments1 [Member]
Statement [Line Items]
Statement [Line Items]
Net Loss
Other Comprehensive Income (Loss):
Other Comprehensive Income Loss Before Tax Period Increase Decrease [Abstract]
Foreign currency translation gains (losses), net
Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax
Derivative losses on cash flow hedges
Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Before Tax
Reclassification of derivative losses on cash flow hedges
Other Comprehensive Income Loss Reclassification Adjustment From A O C I On Derivatives Before Tax
Other comprehensive income
Other Comprehensive Income Loss Before Tax
Income tax benefit (expense)
Other Comprehensive Income Loss Tax
Other comprehensive income, net
Other Comprehensive Income Loss Net Of Tax
Comprehensive Loss
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
Comprehensive Loss attributable to Noncontrolling Interests in Subsidiaries
Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest
Comprehensive Loss attributable to SEACOR Marine Holdings Inc.
Comprehensive Income Net Of Tax
Percentage of owned companies derivative losses on cash flow hedges reclassification to equity in earnings.
Reclassification of derivative losses on cash flow hedges to equity in losses
Percentage Of Owned Companies Derivative Losses On Cash Flow Hedges Reclassification To Equity In Earnings
Stock repurchased during period shares exercise of warrants.
Stock repurchased during period value exercise of warrants.
Stock granted during period shares share based compensation.
Sale of standby safety fleet.
Dissolution of entity.
Cancellation of grants and options shares.
Adjustment to additional paid in capital value cancellation of grants and options.
Statement Of Stockholders Equity [Abstract]
Equity Components
Statement Equity Components [Axis]
Equity Component
Equity Component [Domain]
Common Stock [Member]
Common Stock [Member]
Additional Paid-in Capital [Member]
Additional Paid In Capital [Member]
Treasury Stock [Member]
Treasury Stock [Member]
Retained Earnings [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Loss [Member]
Accumulated Other Comprehensive Income [Member]
Non-Controlling Interests In Subsidiaries [Member]
Noncontrolling Interest [Member]
Revision of Prior Period
Restatement [Axis]
Revision of Prior Period
Restatement [Domain]
Previously Reported [Member]
Scenario Previously Reported [Member]
Revision of Prior Period, Accounting Standards Update, Adjustment [Member]
Revision Of Prior Period Accounting Standards Update Adjustment [Member]
Balance
Balance (in shares)
Issuance of Common Stock
Stock Issued During Period Value New Issues
Issuance of Common Stock (in shares)
Stock Issued During Period Shares New Issues
Issuance of Warrants
Adjustments To Additional Paid In Capital Warrant Issued
Restricted stock grants
Stock Issued During Period Value Restricted Stock Award Gross
Restricted stock grants (in shares)
Stock Issued During Period Shares Restricted Stock Award Gross
Cancellation of restricted stock grants
Stock Issued During Period Value Restricted Stock Award Forfeitures
Cancellation of restricted stock grants (in shares)
Stock Issued During Period Shares Restricted Stock Award Forfeited
Cancellation of grants and options
Adjustment To Additional Paid In Capital Value Cancellation Of Grants And Options
Cancellation of grants and options (in shares)
Cancellation Of Grants And Options Shares
Amortization of employee share awards
Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value
Amortization of employee share awards (Shares)
Stock Issued During Period Shares Share Based Compensation
Exercise of options
Stock Issued During Period Value Stock Options Exercised
Exercise of options (in shares)
Stock Issued During Period Shares Stock Options Exercised
Exercise of Warrants
Stock Repurchased During Period Value Exercise Of Warrants
Exercise of Warrants (in shares)
Stock Repurchased During Period Shares Exercise Of Warrants
Restricted stock vesting
Treasury Stock Value Acquired Cost Method
Restricted stock vesting (in shares)
Treasury Stock Shares Acquired
Director share awards
Stock Issued During Period Value Issued For Services
Director share awards (in shares)
Stock Issued During Period Shares Issued For Services
Acquisition of consolidated joint venture
Stock Granted During Period Value Sharebased Compensation
Acquisition of consolidated joint venture (in shares)
Stock Granted During Period Shares Share Based Compensation
Sale of Standby Safety Fleet
Sale Of Standby Safety Fleet
Dissolution of an entity
Dissolution Of Entity
Issuance of noncontrolling interests
Noncontrolling Interest Increase From Subsidiary Equity Issuance
Other comprehensive (income) loss
Balance
Balance (in shares)
The value of restricted stock that has vested during the period
The amount of expense for director stock awards.
The net amount of cash paid for or received to settle derivatives during the period not designated as hedges.
Payments for proceeds from cash impact of sale of ERRV fleet.
Payments to acquire proceeds from divestiture interest in joint venture.
The cash inflow from investments 50% or less owned due to distributions classified as return of capital.
Construction reserve funds transferred to short term cash.
Amount of cash inflow from exercise of stock options and warrants granted.
Proceeds from interest on finance leases.
Payment to subsidiary shares from noncontrolling interests.
Cash, cash equivalents, restricted cash and restricted cash equivalents, period increase (decrease), continuing operations, including exchange rate effect.
Cash, cash equivalents, restricted cash and restricted cash equivalents, period increase (decrease), discontinued operations, including exchange rate effect.
Noncash decrease in joint venture investments related to acquisition.
Noncash increase in long term debt related to asset purchases.
Increase (Decrease) in capital expenditures in accounts payable and accrued liabilities.
Statement Of Cash Flows [Abstract]
Disposal Group Name
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Axis]
Disposal Group Name
Disposal Groups Including Discontinued Operations Name [Domain]
ERRV fleet business.
ERRV Fleet Business
E R R V Fleet Business [Member]
Cash Flows from Continuing Operating Activities:
Net Cash Provided By Used In Operating Activities Continuing Operations [Abstract]
Net Loss
Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest
Adjustments to reconcile net loss to net cash (used in) provided by operating activities:
Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]
Deferred financing cost amortization
Amortization Of Financing Costs
Amortization of deferred gains against charter expense
Sale Leaseback Transaction Current Period Gain Recognized
Amortization of employee share awards
Employee Benefits And Share Based Compensation
Restricted stock vesting
Restricted Stock Vesting
Director share awards
Director Stock Awards
Debt discount amortization
Amortization Of Debt Discount Premium
Provision for expected credit losses
Provision For Doubtful Accounts
Losses from equipment sales, retirements or impairments
Loss from sale of Boston Putford Offshore Safety
Gain Loss On Disposition Of Assets1
Gain from other sales
Gain Loss On Sale Of Other Assets
Derivative gains
Cash settlement payments on derivative transactions, net
Payments For Proceeds From Derivative Instruments Operating Activities
Currency losses
Equity losses
Dividends received from equity investees
Proceeds From Dividends Received
Changes in operating assets and liabilities:
Increase Decrease In Operating Capital [Abstract]
Accounts Receivables
Increase Decrease In Receivables
Other Assets
Increase Decrease In Prepaid Deferred Expense And Other Assets
Accounts payable and accrued liabilities
Increase Decrease In Accounts Payable And Accrued Liabilities
Net cash (used in) provided by operating activities
Net Cash Provided By Used In Operating Activities Continuing Operations
Cash Flows from Investing Activities:
Net Cash Provided By Used In Investing Activities Continuing Operations [Abstract]
Purchases of property and equipment
Payments To Acquire Property Plant And Equipment
Proceeds from disposition of property and equipment
Proceeds From Sale Of Property Plant And Equipment
Cash impact of sale of ERRV fleet
Payments For Proceeds From Cash Impact Of Sale Of E R R V Fleet
Purchase of subsidiary from joint venture
Payments To Acquire Proceeds From Divestiture Interest In Joint Venture
Investments in and advances to 50% or less owned companies
Payments To Acquire Equity Method Investments
Return of investments and advances from 50% or less owned companies
Proceeds From Investments Distribution Return Of Capital
Construction reserve funds transferred to short-term cash
Construction Reserve Funds Transferred To Short Term Cash
Construction reserve funds utilized
Payments For Proceeds From Other Investing Activities
Principal payments on notes due from equity investees
Repayment Of Notes Receivable From Related Parties
Net cash provided by (used in) investing activities
Net Cash Provided By Used In Investing Activities Continuing Operations
Cash Flows from Financing Activities:
Net Cash Provided By Used In Financing Activities Continuing Operations [Abstract]
Payments on long-term debt
Repayments Of Long Term Debt
Proceeds from issuance of long-term debt
Proceeds From Issuance Of Long Term Debt
Proceeds from exercise of stock options and warrants
Proceeds From Stock Options And Warrants Exercised
Interest on Finance Leases
Proceeds From Interest On Finance Leases
Issuance of stock
Proceeds From Issuance Of Common Stock
Issuance of warrants
Proceeds From Issuance Of Warrants
Purchase of subsidiary shares from noncontrolling interests
Payment To Subsidiary Shares From Noncontrolling Interests
Net cash (used in) provided by financing activities
Net Cash Provided By Used In Financing Activities Continuing Operations
Effects of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash
Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
Net Decrease in Cash, Cash Equivalents and Restricted Cash, Continuing Operations
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Continuing Operations Including Exchange Rate Effect
Cash Flows from Discontinued Operations:
Net Cash Provided By Used In Discontinued Operations [Abstract]
Operating Activities
Cash Provided By Used In Operating Activities Discontinued Operations
Investing Activities
Cash Provided By Used In Investing Activities Discontinued Operations
Financing Activities
Cash Provided By Used In Financing Activities Discontinued Operations
Effects of Exchange Rate Changes on Cash, Restricted Cash and Cash Equivalents
Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Disposal Group Including Discontinued Operations
Net Increase in Cash, Restricted Cash and Cash Equivalents on Discontinued Operations
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Discontinued Operations Including Exchange Rate Effect
Net Decrease in Cash, Cash Equivalents and Restricted Cash
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
Cash, Cash Equivalents and Restricted Cash, Beginning of Year
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations
Cash, Cash Equivalents and Restricted Cash, End of Year
Supplemental disclosures:
Supplemental Cash Flow Information [Abstract]
Cash paid for interest, excluding capitalized interest
Interest Paid Net
Income taxes refunded, net
Income Taxes Paid Net
Noncash Investing and Financing Activities:
Noncash Investing And Financing Items [Abstract]
Increase in property, plant and equipment related to an acquisition
Noncash Or Part Noncash Acquisition Fixed Assets Acquired1
Decrease in joint venture investments related to an acquisition
Noncash Decrease In Joint Venture Investments Related To Acquisition
Increase in long-term debt related to an acquisition
Noncash Or Part Noncash Acquisition Debt Assumed1
Increase in long-term debt related to asset purchases
Noncash Increase In Long Term Debt Related To Asset Purchases
Increase in capital expenditures in accounts payable and accrued liabilities
Increase Decrease In Capital Expenditures In Accounts Payable And Accrued Liabilities
Documents Incorporated by Reference
Documents Incorporated By Reference [Text Block]
Nature of operation and accounting policies [Abstract].
Nature Of Operation And Accounting Policies [Abstract]
Nature of Operations and Accounting Policies
Basis Of Accounting
Restructuring And Related Activities [Abstract]
Transformation, Facility Restructuring and Severance Charges
Restructuring And Related Activities Disclosure [Text Block]
Business Combinations [Abstract]
Business Acquisitions
Business Combination Disclosure [Text Block]
Equipment Acquisitions and Dispositions
Property Plant And Equipment Disclosure [Text Block]
Schedule Of Investments [Abstract]
Investments, at Equity, and Advances to 50% or Less Owned Companies
Equity Method Investments Disclosure [Text Block]
Restricted Cash And Investments [Abstract]
Construction Reserve Funds
Restricted Assets Disclosure [Text Block]
Leases [Abstract]
Leases
Lessee Operating Leases [Text Block]
Debt Disclosure [Abstract]
Long Term Debt
Long Term Debt [Text Block]
Income Tax Disclosure [Abstract]
Income Taxes
Income Tax Disclosure [Text Block]
Derivative Instruments And Hedging Activities Disclosure [Abstract]
Derivative Instruments and Hedging Strategies
Derivative Instruments And Hedging Activities Disclosure [Text Block]
Fair Value Disclosures [Abstract]
Fair Value Measurements
Fair Value Disclosures [Text Block]
The entire disclosure for warrants and rights.
Warrants And Rights Note Disclosure [Abstract]
Warrants
Warrants And Rights [Text Block]
Equity [Abstract]
Stockholders' Equity
Stockholders Equity Note Disclosure [Text Block]
Noncontrolling Interest [Abstract]
Noncontrolling Interests in Subsidiaries
Minority Interest Disclosure [Text Block]
Compensation And Retirement Disclosure [Abstract]
Savings and Multi-employer Pension Plans
Pension And Other Postretirement Benefits Disclosure [Text Block]
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Share Based Compensation
Disclosure Of Compensation Related Costs Share Based Payments [Text Block]
Related Party Transactions [Abstract]
Related Party Transactions
Related Party Transactions Disclosure [Text Block]
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies
Commitments And Contingencies Disclosure [Text Block]
Notes To Financial Statements [Abstract]
Notes To Financial Statements [Abstract]
Major Customers and Segment Information
Segment Reporting Disclosure [Text Block]
Discontinued Operations And Disposal Groups [Abstract]
Discontinued Operations
Disposal Groups Including Discontinued Operations Disclosure [Text Block]
Quarterly Financial Information Disclosure [Abstract]
Quarterly Financial Information
Quarterly Financial Information [Text Block]
Valuation And Qualifying Accounts [Abstract]
Schedule II - Valuation and Qualifying Accounts
Schedule Of Valuation And Qualifying Accounts Disclosure [Text Block]
Accounting Policies [Abstract]
Nature of Operations and Segmentation
Segment Reporting Policy Policy [Text Block]
Basis of Consolidation
Consolidation Policy [Text Block]
Use of Estimates
Use Of Estimates
Revenue Recognition
Revenue Recognition Policy [Text Block]
Cash Equivalents
Cash And Cash Equivalents Unrestricted Cash And Cash Equivalents Policy
Restricted Cash
Cash And Cash Equivalents Restricted Cash And Cash Equivalents Policy
Trade and Other Receivables
Receivables Policy [Text Block]
Derivative Instruments
Derivatives Policy [Text Block]
Concentrations of Credit Risk
Concentration Risk Credit Risk
Inventories
Inventory Policy [Text Block]
Property and Equipment
Property Plant And Equipment Policy [Text Block]
Impairment of Long-Lived Assets and Impairment of 50% or Less Owned Companies
Impairment Or Disposal Of Long Lived Assets Including Intangible Assets Policy Policy [Text Block]
Business Combinations
Business Combinations Policy
Debt Discount and Issue Costs
Deferred Charges Policy [Text Block]
Self-insurance Liabilities
Self Insurance Reserve Policy [Text Block]
Income Taxes
Income Tax Policy [Text Block]
Disclosure of accounting policy for the deferral and amortization of gains on asset sales to 50% or less owned companies and gains on sale and leaseback transactions of significant deferred charges.
Deferred Gains - Vessel Sale-Leaseback Transactions and Financed Vessel Sales
Deferred Gains Policy [Text Block]
Foreign Currency Translation
Foreign Currency Transactions And Translations Policy [Text Block]
Accumulated Other Comprehensive (Loss) Income
Comprehensive Income Policy Policy [Text Block]
Loss Per Share
Earnings Per Share Policy [Text Block]
Recently Adopted Accounting Standards
New Accounting Pronouncements Policy Policy [Text Block]
Schedule of Deferred Revenues
Deferred Revenue By Arrangement Disclosure [Text Block]
Tabular disclosure of the components of cash, cash equivalents and restricted cash.
Schedule Of Cash Cash Equivalents And Restricted Cash From Continuing Operations
Schedule Of Cash Cash Equivalents And Restricted Cash Table [Text Block]
Tabular disclosure of estimated useful life of physical assets used in the normal conduct of business and not intended for resale.
Schedule of Property and Equipment Useful Life
Property Plant And Equipment Estimated Useful Life Table [Text Block]
Summary of Property and Equipment from Continuing Operations
Property Plant And Equipment [Text Block]
Tabular disclosure of schedule of deferred gains during the period.
Schedule Of Deferred Gain Activity
Schedule Of Deferred Gain Table [Text Block]
Schedule of Accumulated Other Comprehensive (Loss) Income
Schedule Of Comprehensive Income Loss Table [Text Block]
Schedule of Components of Restructuring Charges
Schedule Of Restructuring And Related Costs [Text Block]
Summary of Purchase Price Allocation of Acquired Assets
Schedule Of Recognized Identified Assets Acquired And Liabilities Assumed Table [Text Block]
Tabular disclosure of vessels acquired and disposed of during the period.
Schedule of Vessel Acquired and Disposed
Shedule Of Vessel Acquired And Disposed Of Table [Text Block]
Equity Method Investments
Equity Method Investments [Text Block]
Lessee operating and finance lease liability maturity.
Summary of Future Minimum Payments For Leases
Lessee Operating And Finance Lease Liability Maturity Table [Text Block]
Summary of Components of Leases Expense
Lease Cost Table [Text Block]
Schedule of supplemental cash flow information related to leases.
Summary of Supplemental Cash Flow Information Related to Leases
Schedule Of Supplemental Cash Flow Information Related To Leases Table [Text Block]
Schedule of other information related to leases.
Summary of Other Information Related to Leases
Schedule Of Other Information Related To Leases Table [Text Block]
Schedule of Long-term Debt Obligations
Schedule Of Debt Instruments [Text Block]
Schedule of Long-term Debt Maturities
Schedule Of Maturities Of Long Term Debt Table [Text Block]
Schedule of Income before Income Tax, Domestic and Foreign
Schedule Of Income Before Income Tax Domestic And Foreign Table [Text Block]
Schedule of Components of Income Tax Expense (Benefit)
Schedule Of Components Of Income Tax Expense Benefit Table [Text Block]
Schedule of Effective Income Tax Rate Reconciliation
Schedule Of Effective Income Tax Rate Reconciliation Table [Text Block]
Schedule of Deferred Tax Assets and Liabilities
Schedule Of Deferred Tax Assets And Liabilities Table [Text Block]
Schedule of Fair Value of Derivative Assets and Liabilities From Continuing Operations
Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value [Text Block]
Effect of Derivative Instruments on Other Comprehensive Income (Loss)
Schedule Of Derivative Instruments Effect On Other Comprehensive Income Loss Table [Text Block]
Schedule of Gains (Losses) on Derivative Instruments not Designated as Hedging Instruments
Schedule Of Other Derivatives Not Designated As Hedging Instruments Statements Of Financial Performance And Financial Position Location Table [Text Block]
Schedule of Fair Value of Assets and Liabilities Measured on Recurring Basis
Schedule Of Fair Value Assets And Liabilities Measured On Recurring Basis Table [Text Block]
Schedule of Estimated Fair Values of Financial Assets and Liabilities
Fair Value By Balance Sheet Grouping [Text Block]
Schedule of Other Assets and Liabilities Measured at Fair Value
Fair Value Assets Measured On Recurring And Nonrecurring Basis Table [Text Block]
Tabular disclosure of noncontrolling interest.
Schedule of Noncontrolling Interests in the Company's Consolidated Subsidiaries
Schedule Of Noncontrolling Interest Table [Text Block]
Schedule of Equity Incentive Plan Transactions
Schedule Of Share Based Compensation Activity Table [Text Block]
Schedule of Restricted Stock Transactions
Nonvested Restricted Stock Shares Activity Table [Text Block]
Schedule of Stock Option Transactions
Schedule Of Share Based Compensation Stock Options Activity Table [Text Block]
Segment Reporting [Abstract]
Schedule of Segment Reporting Information, by Segment
Schedule Of Segment Reporting Information By Segment [Text Block]
Schedule of Assets Held for Sale
Schedule Of Disposal Groups Including Discontinued Operations Income Statement Balance Sheet And Additional Disclosures [Text Block]
Selected Financial Information for Interim Quarterly Periods
Schedule Of Quarterly Financial Information Table [Text Block]
Tabular disclosure of Schedule II Valuation and Qualifying Accounts.
Schedule of Valuation and Qualifying Accounts
Schedule I I Valuation And Qualifying Accounts Table [Text Block]
Nature of operations and accounting policies [Line Items].
Nature of operations and accounting policies table.
Nature Of Operations And Accounting Policies [Table]
Nature Of Operations And Accounting Policies [Table]
Geographical
Statement Geographical [Axis]
Geographical
Segment Geographical [Domain]
UNITED STATES
UNITED STATES
Africa
Africa [Member]
Information pertaining to Middle East and Asia.
Middle East and Asia
Middle East And Asia [Member]
Latin America
Latin America [Member]
Investment, Name
Schedule Of Equity Method Investment Equity Method Investee Name [Axis]
Investment, Name
Equity Method Investee Name [Domain]
Information pertaining to MexMar.
MexMar
Mex Mar [Member]
SEACOR Marine International LLC.
SMI
S E A C O R Marine International L L C [Member]
MEXMAR offshore [Member].
MEXMAR Offshore
M E X M A R Offshore [Member]
Ownership
Ownership [Axis]
Ownership
Ownership [Domain]
CME.
CME
C M E [Member]
Europe
Europe [Member]
Long-Lived Tangible Asset
Property Plant And Equipment By Type [Axis]
Long-Lived Tangible Asset
Property Plant And Equipment Type [Domain]
Information pertaining to crew transfer vessels.
Crew Transfer Vessels
Crew Transfer Vessels [Member]
Statistical Measurement
Range [Axis]
Statistical Measurement
Range [Member]
Minimum
Minimum [Member]
Maximum
Maximum [Member]
Legal Entity
Legal Entity [Axis]
Entity
Entity [Domain]
SEACOR Marine Foreign Holdings.
SEACOR Marine Foreign Holdings
S E A C O R Marine Foreign Holdings [Member]
Geographic Distribution
Geographic Distribution [Axis]
Geographic Distribution
Geographic Distribution [Domain]
Geographic Distribution, Domestic
Geographic Distribution Domestic [Member]
Geographic Distribution, Foreign
Geographic Distribution Foreign [Member]
Balance Sheet Location
Balance Sheet Location [Axis]
Balance Sheet Location
Balance Sheet Location [Domain]
Prepaid vessel management fees.
Prepaid Vessel Management Fees
Prepaid Vessel Management Fees [Member]
Prepaid charter modification and reservation fees.
Prepaid Charter Modification and Reservation Fees [Member]
Prepaid Charter Modification And Reservation Fees [Member]
Operating Activities
Statement Operating Activities Segment [Axis]
Operating Activities
Segment Operating Activities [Domain]
Continuing Operations
Segment Continuing Operations [Member]
Discontinued Operations
Segment Discontinued Operations [Member]
Emergency response and rescue vessel member.
ERRVs
Emergency Response And Rescue Vessel [Member]
Liftboat vessels.
Liftboat Vessels
Liftboat Vessels [Member]
Information pertaining to anchor handling towing supply.
Anchor Handling Towing Supply
Anchor Handling Towing Supply Vessel [Member]
Specialty vessel member.
Specialty Vessel
Specialty Vessel [Member]
Vessel under construction.
Vessel Under Construction
Vessel Under Construction [Member]
Antidilutive Securities
Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis]
Antidilutive Securities, Name
Antidilutive Securities Name [Domain]
Restricted Stock
Restricted Stock [Member]
Employee Stock Option
Employee Stock Option [Member]
Award Type
Award Type [Axis]
Award Type
Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]
Performance Share Awards
Performance Shares [Member]
Accounting Standards Update
Adjustments For New Accounting Pronouncements [Axis]
Accounting Standards Update
Type Of Adoption [Member]
Accounting Standards Update 2014-09
Accounting Standards Update201409 [Member]
Accounting Standards Update 2016-02
Accounting Standards Update201602 [Member]
Cumulative Effect, Period of Adoption
Cumulative Effect Period Of Adoption [Axis]
Cumulative Effect, Period of Adoption
Cumulative Effect Period Of Adoption [Domain]
Cumulative Effect, Period of Adoption, Adjustment
Cumulative Effect Period Of Adoption Adjustment [Member]
Change in Accounting Principle, Type
Adjustments For Change In Accounting Principle [Axis]
Change in Accounting Principle, Type
Change In Accounting Principle [Member]
Information pertaining to the change in accounting principle for equipment, office and land leases.
Change in Accounting Principle for Equipment, Office and Land Leases
Change In Accounting Principle For Equipment Office And Land Leases [Member]
Information pertaining to the change in accounting principle for unamortized deferred gains.
Change in Accounting Principle for Unamortized Deferred Gains
Change In Accounting Principle For Unamortized Deferred Gains [Member]
Accounting Standards Update 2019-12
Accounting Standards Update201912 [Member]
Nature Of Operations And Accounting Policies [Line Items]
Nature Of Operations And Accounting Policies [Line Items]
Number of reportable segments
Number Of Reportable Segments
Number of vessels.
Number of vessels owned.
Number of vessels joint ventured.
Number of vessels leased in.
Number of vessels managed-in.
Number of vessels
Number Of Vessels
Number of vessels owned
Number Of Vessels Owned
Number of vessels leased-in
Number Of Vessels Leased In
Number of vessels joint ventured
Number Of Vessels Joint Ventured
Number of vessels managed-in
Number Of Vessels Managed In
Equity method investment, ownership percentage
Equity Method Investment Ownership Percentage
Noncontrolling interest, ownership percentage by noncontrolling owners
Minority Interest Ownership Percentage By Noncontrolling Owners
Number of equipment sold upon completion.
Number of equipment sold upon completion
Number Of Equipment Sold Upon Completion
Balance at beginning of year
Contract With Customer Liability
Revenues deferred during the year
Deferred Revenue Additions
Revenues recognized during the year
Deferred Revenue Revenue Recognized1
Balance at end of year
Contract with customer, liability
Contract with customer liability current
Cash
Cash
Restricted cash
Restricted Cash
Total
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
Inventory reserves
Inventory Valuation Reserves
Schedule Of Property Plant And Equipment [Table]
Schedule Of Property Plant And Equipment [Table]
CTVs
Information pertaining to all other offshore support vessels.
All Other Offshore Support Vessels
All Other Offshore Support Vessels [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment [Line Items]
Estimated useful life (Year)
Property Plant And Equipment Useful Life
Represents information pertaining to anchor handling towing supply included within offshore support vessels.
Offshore Support Vessels, Anchor Handling Towing Supply
Offshore Support Vessels Anchor Handling Towing Supply [Member]
Fast support vessels member.
Fast Support Vessels
Fast Support Vessels [Member]
Represents information pertaining to supply vessels included within offshore support vessels.
Offshore Support Vessels, Supply
Offshore Support Vessels Supply [Member]
Represents information pertaining to specialty vessels included within offshore support vessels.
Offshore Support Vessels, Specialty
Offshore Support Vessels Specialty [Member]
Represents information pertaining to liftboats included within offshore support vessels.
Offshore Support Vessels, Liftboats
Offshore Support Vessels Liftboats [Member]
Represents information pertaining to general machinery and spares.
General Machinery and Spares
General Machinery And Spares [Member]
Property, Plant and Equipment, Other Types
Property Plant And Equipment Other Types [Member]
Net book value
Depreciation, total
Depreciation
Net book value
Capitalized interest costs, including allowance for funds used during construction, total
Interest Costs Incurred Capitalized
Partial impairment of right to use assets.
Additional impairment of right-to-use assets.
Impairment of long-lived assets held-for-use
Impairment Of Long Lived Assets Held For Use
Partial impairment of right to use assets
Partial Impairment Of Right To Use Assets
Additional impairment of right-to-use assets
Additional Impairment Of Right To Use Assets
Equity method investment, other than temporary impairment
Equity Method Investment Other Than Temporary Impairment
Reclass of gain to retained earnings.
Represents the amount of amortization of deferred gains included in gains on asset dispositions and impairments, net.
The amount of other adjustment to deferred gain on sale of property.
Product and Service
Product Or Service [Axis]
Product and Service
Products And Services [Domain]
Represents information pertaining to sale-leaseback and financed equipment sales.
Sale-leaseback and Financed Equipment Sales
Sale Leaseback And Financed Equipment Sales [Member]
Represents information pertaining to 50% or less owned subsidiaries.
Vessel Sales to Fifty Percent or Less Owned Subsidiaries
Vessel Sales To Fifty Percent Or Less Owned Subsidiaries [Member]
Balance at beginning of year
Deferred Gain On Sale Of Property
Amortization of deferred gains
Amortization Of Deferred Charges
Reclass of gain to Retained Earnings
Reclass Of Gain To Retained Earnings
Recognition of deferred gains included in losses on asset dispositions and impairments, net
Amortization Of Deferred Gains Included In Gains On Asset Dispositions And Impairments Net
Other
Deferred Gain On Sale Of Property Other Adjustments
Balance at end of year
Deferred gain net
Accumulated Other Comprehensive Income Loss [Table]
Accumulated Other Comprehensive Income Loss [Table]
Accumulated Foreign Currency Adjustment Attributable to Parent
Accumulated Translation Adjustment [Member]
Accumulated Loss, Net, Cash Flow Hedge, Parent
Accumulated Gain Loss Net Cash Flow Hedge Parent [Member]
AOCI Attributable to Parent
Accumulated Foreign Currency Adjustment Attributable to Noncontrolling Interest
Accumulated Foreign Currency Adjustment Attributable To Noncontrolling Interest [Member]
Accumulated Gain (Loss), Net, Cash Flow Hedge, Noncontrolling Interest
Accumulated Gain Loss Net Cash Flow Hedge Noncontrolling Interest [Member]
AOCI Attributable to Noncontrolling Interest
Aoci Attributable To Noncontrolling Interest [Member]
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income Loss [Line Items]
Other comprehensive (loss) income
Income tax benefit (expense)
Incremental common shares attributable to conversion of debt securities, total
Incremental Common Shares Attributable To Conversion Of Debt Securities
Antidilutive securities excluded from computation of earnings per share, amount
Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount
Number of shares issued
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period
Number of shares outstanding
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number
Change in accounting principle, accounting standards update, adopted [true false]
Change In Accounting Principle Accounting Standards Update Adopted
Change in accounting principle, accounting standards update, adoption date
Change In Accounting Principle Accounting Standards Update Adoption Date
Change in accounting principle, accounting standards update, immaterial effect [true false]
Change In Accounting Principle Accounting Standards Update Immaterial Effect
Operating Lease, Liability
Operating Lease Liability
Cumulative effect on retained earnings, net of tax
Deferred taxes
Deferred Tax Liabilities
Expected annualized recurring savings.
Schedule Of Restructuring And Related Costs [Table]
Schedule Of Restructuring And Related Costs [Table]
Restructuring Plan
Restructuring Plan [Axis]
Restructuring Plan
Restructuring Plan [Domain]
Transformation Plan.
Transformation Plan
Transformation Plan [Member]
Restructuring Cost And Reserve [Line Items]
Restructuring Cost And Reserve [Line Items]
Restructuring and related activities, description
Restructuring And Related Activities Description
Expected annualized recurring savings
Expected Annualized Recurring Savings
Severance charges.
Restructuring charges
Restructuring Charges
Severance charges
Severance Charges
Other restructuring charges
Other Restructuring Costs
Severance Charges
Severance Costs1
Other Charges
Total Charges
Restructuring Costs
Restructuring Costs
Note To Financial Statement Details Textual
Note To Financial Statement Details Textual
SEACOR Offshore Delta LLC.
SEACOR Offshore Delta LLC
S E A C O R Offshore Delta L L C [Member]
SEACOR offshore asia.
SEACOR Offshore Asia
S E A C O R Offshore Asia [Member]
Collaborative Arrangement and Arrangement Other than Collaborative
Type Of Arrangement [Axis]
Collaborative Arrangement and Arrangement Other than Collaborative
Arrangements And Nonarrangement Transactions [Member]
Sale and purchase agreement.
Sale And Purchase Agreement
Sale And Purchase Agreement [Member]
Member stands for platform supply vessels ("PSVs").
Platform Supply Vessels
Platform Supply Vessels [Member]
Deferred purchase agreements.
Deferred Purchase Agreements
Deferred Purchase Agreements [Member]
Equity Method Investment Ownership Percentage
Business Acquisition Percentage Of Voting Interests Acquired
Purchase price payable for equity method investment.
Business combination, purchase price payable to sellers at closing of transaction.
Business acquisition purchase price for membership interests annual installment payment in year one.
Business acquisition purchase price for membership interests annual installment payment in year two.
Business acquisition purchase price for membership interests annual installment payment in year three.
Business Acquisition Purchase price for membership interests annual installment payment in year four.
Business acquisition percentage of purchase price fixed accrued interest rate for membership interest in year one.
Business acquisition percentage of purchase price fixed accrued interest rate for membership interest in two.
Business acquisition percentage of purchase price fixed accrued interest rate for membership interest in year three.
Business acquisition percentage of purchase price fixed accrued interest rate for membership interest in year four.
Purchase price payable for membership interest
Purchase Price Payable For Equity Method Investment
Purchase price payable to sellers at closing of transaction
Business Combination Purchase Price Payable To Sellers At Closing Of Transaction
Purchase price for membership interests annual installment payment in first year
Business Acquisition Purchase Price For Membership Interests Annual Installment Payment In Year One
Purchase price for membership interests annual installment payment in second year
Business Acquisition Purchase Price For Membership Interests Annual Installment Payment In Year Two
Purchase price for membership interests annual installment payment in third year
Business Acquisition Purchase Price For Membership Interests Annual Installment Payment In Year Three
Purchase price for membership interests annual installment payment in fourth year
Business Acquisition Purchase Price For Membership Interests Annual Installment Payment In Year Four
Purchase price fixed accrued interest rate in first year
Business Acquisition Percentage Of Purchase Price Fixed Accrued Interest Rate For Membership Interest In Year One
Purchase price fixed accrued interest rate in second year
Business Acquisition Percentage Of Purchase Price Fixed Accrued Interest Rate For Membership Interest In Year Two
Purchase price fixed accrued interest rate in third year
Business Acquisition Percentage Of Purchase Price Fixed Accrued Interest Rate For Membership Interest In Year Three
Purchase price fixed accrued interest rate in fourth year
Business Acquisition Percentage Of Purchase Price Fixed Accrued Interest Rate For Membership Interest In Year Four
Business acquisition purchase price amortization period.
The number of vessels deliverd to the company.
Business acquisition, aggregate amount outstanding
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Liabilities
Business acquisition, amortization period of purchase price
Business Acquisition Purchase Price Amortization Period
Debt instrument, description of floating interest rate basis
Debt Instrument Description Of Variable Rate Basis
Debt instrument, basis spread on floating interest rate
Debt Instrument Basis Spread On Variable Rate1
Number of vessels delivered to the company
Number Of Vessels Delivered To Company
Number of vessels owned with high specification
Number of vessels owned with identical specification.
Number of vessels owned with high specification
Number Of Vessels Owned With High Specification
Number of vessels owned with identical specification
Number Of Vessels Owned With Identical Specification
Business combination recognized identifiable assets acquired and liabilities assumed book value of debt acquired.
Business combination recognized identifiable assets acquired and liabilities assumed discount of debt acquired.
Business combination recognized identifiable assets acquired and liabilities assumed net cost basis for purchase.
Schedule Of Investments [Table]
Schedule Of Investments [Table]
Schedule Of Investments [Line Items]
Schedule Of Investments [Line Items]
Current Assets
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Assets
Fixed Assets
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Noncurrent Assets
Current Liabilities
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Current Liabilities
Book Value of Debt Acquired
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Book Value Of Debt Acquired
Discount on Debt Acquired
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Discount Of Debt Acquired
Fair Value of Debt Acquired
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Fair Value Of Debt Acquired
Total Cost Basis for Purchase
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Net Cost Basis For Purchase
Purchase Price
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Purchase Price
Acquisition costs
Business Combination Recognized Identifiable Assets Acquired And Liabilities Assumed Acquisition Costs
Equity Investment In SEACOR Offshore Delta (f/k/a SEACOSCO)
Equity Method Investments
Total Cost Basis for Purchase
Capital expenditures and payments on equipment.
Windcat Workboats.
Windcat Workboats
Windcat Workboats [Member]
Subsequent Event Type
Subsequent Event Type [Axis]
Subsequent Event Type
Subsequent Event Type [Domain]
Subsequent Event
Subsequent Event [Member]
Vessel under construction and other equipment.
Vessel under Construction and Other Equipment
Vessel Under Construction And Other Equipment [Member]
Anchor Handling Towing Supply
Information pertaining to vessels.
Vessels
Vessels [Member]
Information pertaining to liftboats.
Liftboats
Liftboats [Member]
Capital expenditures and payments on equipment
Capital Expenditures And Payments On Equipment
Represents the number of of equipment acquired.
Acquired
Number Of Equipment Acquired
Number of equipment held for sale excluded from deliveries of offshore support vessels.
Number of equipment acquired excluded from deliveries of offshore support vessels.
Number of equipment held for sale excluded from deliveries of offshore support vessels
Number Of Equipment Held For Sale Excluded From Deliveries Of Offshore Support Vessels
Number of equipment acquired excludes from deliveries of offshore support vessels
Number Of Equipment Acquired Excluded From Deliveries Of Offshore Support Vessels
Number of additional joint ventures held interests.
Sale of equity percentage
Sale Of Stock Percentage Of Ownership After Transaction
Aggregate purchase price
Equity Method Investment Aggregate Cost
Debt outstanding under revolving credit facility
Line Of Credit Facility Maximum Amount Outstanding During Period
Number of additional joint ventures held interests
Number Of Additional Joint Ventures Held Interests
Gain (loss) on disposition of property, plant and equipment
Gain Loss On Sale Of Property Plant Equipment
Proceeds from property, plant, and equipment, including deposits and gain on sale.
Represents the number of equipment sold.
Amount of cash inflow for receipts of deposits.
Proceeds from property, plant, and equipment, including deposits and gain on sale
Proceeds From Property Plant And Equipment Including Deposits And Gain On Sale
Number of equipment sold
Number Of Equipment Sold
Proceeds from sale of business
Proceeds from deposits
Proceeds From Deposits
Disposal group including discontinued operation maximum additional consideration.
Net book value
Additional consideration
Disposal Group Including Discontinued Operation Maximum Additional Consideration
The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale, including deposits.
The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale, excluding deposits for the future sales of vessels.
Proceeds from sale of property, plant, and equipment, including deposits
Proceeds From Sale Of Property Plant And Equipment Including Deposits
Proceeds from sale of property, plant, and equipment, excluding deposits for future vessel sales
Proceeds From Sale Of Property Plant And Equipment Excluding Deposits For Future Vessel Sales
Represents the number of equipment removed from service.
Removed from service
Number Of Equipment Removed From Service
Number of equipment removed from service excludes from major equipment dispositions.
Number of equipment held for sale excluded from major equipment dispositions.
Number of equipment removed from service excludes from major equipment dispositions
Number Of Equipment Removed From Service Excludes From Major Equipment Dispositions
Number of equipment held for sale excluded from major equipment dispositions
Number Of Equipment Held For Sale Excluded From Major Equipment Dispositions
Information pertaining to SEACOSCO Offshore LLC.
SeaCosco
S E A C O S C O Offshore L L C [Member]
Information pertaining to OSV Partners.
OSV Partners
O S V Partners [Member]
Related to the entity SEACOR Marlin LLC.
SEACOR Marlin LLC
S E A C O R Marlin L L C [Member]
Information pertaining to Offshore Vessel Holdings.
Offshore Vessel Holdings
Offshore Vessel Holdings [Member]
Information pertaining to other offshore marine services joint ventures.
Other Offshore Marine Services Joint Ventures
Other Offshore Marine Services Joint Ventures [Member]
All other excluding mexMar falcon global sea cat crewzer and sea cat crewzer II.
All Other Excluding MexMar, Falcon Global, Sea-Cat Crewzer and Sea-Cat Crewzer II
All Other Excluding Mex Mar Falcon Global Sea Cat Crewzer And Sea Cat Crewzer I I [Member]
Equity Method Investment, Nonconsolidated Investee
Equity Method Investment Nonconsolidated Investee [Axis]
Equity Method Investment, Nonconsolidated Investee
Equity Method Investment Nonconsolidated Investee [Domain]
Equity Method Investment, Nonconsolidated Investee or Group of Investees
Equity Method Investment Nonconsolidated Investee Or Group Of Investees [Member]
Ownership percentage
Investments at equity
Partner Type
Partner Type Of Partners Capital Account [Axis]
Partner Type of Partners' Capital Account, Name
Partner Type Of Partners Capital Account Name [Domain]
General Partner
General Partner [Member]
Limited Partner
Limited Partner [Member]
Current assets
Noncurrent assets
Assets Noncurrent
Current liabilities
Noncurrent liabilities
Liabilities Noncurrent
Equity method investment summarized financial information operating and administrative.
Equity method investment summarized financial information depreciation.
Equity method investment summarized financial information operating costs and expenses.
The amount of income (loss) on asset dispositions and impairments reported by an equity method investment of the entity.
Operating and administrative
Equity Method Investment Summarized Financial Information Operating And Administrative
Depreciation
Equity Method Investment Summarized Financial Information Depreciation
Costs and expenses
Equity Method Investment Summarized Financial Information Operating Costs And Expenses
Loss on Asset Dispositions and Impairments, Net
Equity Method Investment Summarized Financial Information Income Loss On Asset Dispositions And Impairments Net
Operating (Loss) Income
Equity method investments unrealized intercompany profit loss not eliminated amount.
Offshore support vessels member.
Offshore Support Vessels
Offshore Support Vessels [Member]
Mexmar offshore international.
Mexmar Offshore International
Mexmar Offshore International [Member]
MEXICO
MEXICO
Jack up drillings.
Jack up Drillings [Member]
Jack Up Drillings [Member]
Information pertaining to FSV offshore support vessels.
F S V Offshore Support Vessels
F S V Offshore Support Vessels [Member]
Consolidated retained earnings
Equity Method Investments Unrealized Intercompany Profit Loss Not Eliminated Amount
Represents the number of equipment operated.
Number of equipment operated
Number Of Equipment Operated
Capital distributions from equity investees
Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital
Revenue from related parties
Revenue From Related Parties
Amount of preferred equity offering participated
Amount of commitment to invest additional funds in preferred equity if called by general partner.
Contributed capital
Partners Capital Account Contributions
Investment in affiliates, amount of preferred equity offering participated
Investment In Affiliates Amount Of Preferred Equity Offereing Participated
Payments to acquire interest in subsidiaries and affiliates, total
Payments To Acquire Interest In Subsidiaries And Affiliates
Commitment to invest additional funds if call by general partner
Commitment To Invest Additional Funds If Call By General Partner
Payments to acquire loans receivable
Payments To Acquire Loans Receivable
The percentage ownership of equity method investments that was sold during the period.
Equity method investment, ownership, percent sold
Equity Method Investment Ownership Percent Sold
Proceeds from divestiture of interest in joint venture
Proceeds From Divestiture Of Interest In Joint Venture
Gain (loss) on disposition of business
Gain Loss On Sale Of Business
Financing agreement.
Noncontrolling Interest, ownership percentage by parent
Minority Interest Ownership Percentage By Parent
Payments to acquire interest in joint venture
Payments To Acquire Interest In Joint Venture
Financing agreement
Financing Agreement
Return of capital equity method investment.
Return of capital equity method investment
Return Of Capital Equity Method Investment
Construction reserve funds commitment period.
Number of extension period.
Construction reserve funds extension period.
Construction reserve funds commitment period
Construction Reserve Funds Commitment Period
Number of extension period
Number Of Extension Period
Construction reserve funds extension period
Construction Reserve Funds Extension Period
Short term construction reserve funds.
Represents the amount of withdrawals for construction reserve fund.
Short-term construction reserve funds
Short Term Construction Reserve Funds
Construction reserve fund withdrawals
Construction Reserve Fund Withdrawals
Cumulative effect on retained earnings before tax.
Cumulative effect on retained earnings tax.
Lessee Lease Description [Table]
Lessee Lease Description [Table]
Member stands for other equipment.
Other Equipment
Other Equipment [Member]
Lessee Lease Description [Line Items]
Lessee Lease Description [Line Items]
Cumulative effect on retained earnings, Before tax
Cumulative Effect On Retained Earnings Before Tax
Cumulative effect on retained earnings, Tax
Cumulative Effect On Retained Earnings Tax
Number of operating leases on equipment.
Number of operating leases on equipment
Number Of Operating Leases On Equipment
Operating lease, lease terms (in duration)
Lessee Operating Lease Term Of Contract
Operating Leases
Operating Lease Liabilities Payments Due [Abstract]
2021
Lessee Operating Lease Liability Payments Due Next Twelve Months
2022
Lessee Operating Lease Liability Payments Due Year Two
2023
Lessee Operating Lease Liability Payments Due Year Three
2024
Lessee Operating Lease Liability Payments Due Year Four
2025
Lessee Operating Lease Liability Payments Due Year Five
Years subsequent to 2025
Lessee Operating Lease Liability Payments Due After Year Five
Operating lease payments due
Lessee Operating Lease Liability Payments Due
Interest component
Lessee Operating Lease Liability Undiscounted Excess Amount
Total operating leases
Current portion of long-term operating lease liabilities
Long-term operating lease liabilities
Finance Leases
Finance Lease Liabilities Payments Due [Abstract]
2021
Finance Lease Liability Payments Due Next Twelve Months
2022
Finance Lease Liability Payments Due Year Two
2023
Finance Lease Liability Payments Due Year Three
2024
Finance Lease Liability Payments Due Year Four
2025
Finance Lease Liability Payments Due Year Five
Years subsequent to 2025
Finance Lease Liability Payments Due After Year Five
Total finance leases
Finance Lease Liability Payments Due
Interest component
Finance Lease Liability Undiscounted Excess Amount
Finance Leases
Finance Lease Liability
Current portion of long-term finance lease liabilities
Long-term finance lease liabilities
Finance lease costs.
Operating lease expense
Operating Lease Expense
Finance lease cost:
Finance Lease Costs [Abstract]
Amortization of finance lease asset
Finance Lease Right Of Use Asset Amortization
Interest on lease liabilities
Finance Lease Interest Expense
Short-term lease costs
Short Term Lease Cost
Total lease expense
Lease Cost
Operating cash flows from operating leases
Operating Lease Payments
Right-of-use assets obtained for operating lease liabilities
Right Of Use Asset Obtained In Exchange For Operating Lease Liability
Right-of-use assets obtained for finance lease liabilities
Right Of Use Asset Obtained In Exchange For Finance Lease Liability
Weighted average remaining lease term, in years - operating leases
Operating Lease Weighted Average Remaining Lease Term1
Weighted average remaining lease term, in years - finance leases
Finance Lease Weighted Average Remaining Lease Term1
Weighted average discount rate - operating leases
Operating Lease Weighted Average Discount Rate Percent
Weighted average discount - finance leases
Finance Lease Weighted Average Discount Rate Percent
Represents number of operating leases impaired.
Operating Lease, Impairment Loss
Operating Lease Impairment Loss
Number of Operating Leases Impaired
Number Of Operating Leases Impaired
Debt Instrument [Table]
Debt Instrument [Table]
Debt Instrument
Debt Instrument [Axis]
Debt Instrument, Name
Debt Instrument Name [Domain]
Member represents convertible senior notes.
Convertible Senior Notes
Convertible Senior Notes [Member]
Member stands for SEACOR Marine Foreign Holdings Credit Facility.
SEACOR Marine Foreign Holdings Credit Facility
S E A C O R Marine Foreign Holdings Credit Facility [Member]
Information pertaining to Falcon Global USA LLC term loan facility.
Falcon Global USA Term Loan Facility
Falcon Global U S A Term Loan Facility [Member]
Represents information about Sea-Cat Crewzer III term loan facility.
Sea-Cat Crewzer III Term Loan Facility
Sea Cat Crewzer I I I Term Loan Facility [Member]
Member stands for SEACOR Offshore Delta (formerly known as SEACOSCO) Acquisition Debt.
SEACOR Offshore Delta (f/k/a SEACOSCO) Acquisition Debt
S E A C O R Offshore Delta Formerly Known As S E A C O S C O Acquisition Debt [Member]
Member stands for SEACOR Delta (formerly known as SEACOSCO) Shipyard Financing.
SEACOR Delta (f/k/a SEACOSCO) Shipyard Financing
S E A C O R Delta Formerly Known As S E A C O S C O Shipyard Financing [Member]
Represents a member containing information about Falcon Global USA Revolver facilitis.
Falcon Global USA Revolver
Falcon Global U S A Revolver [Member]
Member stands for SEACOR Alpine Shipyard Financing.
SEACOR Alpine Shipyard Financing
S E A C O R Alpine Shipyard Financing [Member]
Member stands for SEACOR 88/888 term loan.
SEACOR 88/888 Term Loan
S E A C O R88888 Term Loan [Member]
Member constains information about BNDES equipment consturction finance notes.
BNDES Equipment Construction Finance Notes
B N D E S Equipment Construction Finance Notes [Member]
Mebers stands for Windcat workboats facilities.
Windcat Workboats Facilities
Windcat Workboats Facilities [Member]
Recourse Status
Recourse Status [Axis]
Recourse Status
Recourse Status [Domain]
Recourse Long-Term Debt
Recourse [Member]
Non-Recourse Long-Term Debt
Nonrecourse [Member]
Current liabilities.
Current Liabilities
Current Liabilities [Member]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Long-term Debt, Gross
Debt Instrument Carrying Amount
Current portion due within one year
Long Term Debt Current
Unamortized debt discount
Debt Instrument Unamortized Discount
Deferred financing costs
Deferred Finance Costs Noncurrent Net
Long-term debt, less current portion
Long Term Debt Noncurrent
Business Acquisition
Business Acquisition [Axis]
Business Acquisition, Acquiree
Business Acquisition Acquiree [Domain]
Number of vessels acquired
2021
Long Term Debt Maturities Repayments Of Principal In Next Twelve Months
2022
Long Term Debt Maturities Repayments Of Principal In Year Two
2023
Long Term Debt Maturities Repayments Of Principal In Year Three
2024
Long Term Debt Maturities Repayments Of Principal In Year Four
2025
Long Term Debt Maturities Repayments Of Principal In Year Five
Years subsequent to 2025
Long Term Debt Maturities Repayments Of Principal After Year Five
Long-term Debt, Gross
Maximum borrowing capacity under a debt agreement on the amount that could be borrowed with a combination of, but not limited to, a line of credit and term loan.
FGUSA omnibus amendment.
FGUSA Omnibus Amendment
F G U S A Omnibus Amendment [Member]
Term and revolving loan facility.
Term and Revolving Loan Facility
Term And Revolving Loan Facility [Member]
Seventh FGUSA credit facility amendment.
Seventh FGUSA Credit Facility Amendment
Seventh F G U S A Credit Facility Amendment [Member]
SEACOR Offshore Delta (f/k/a SEACOSCO)
Related to the loan facility with DNB Bank ASA.
Loan Facility With DNB Bank ASA
Loan Facility With D N B Bank A S A [Member]
Related to the other DNB credit facilities.
Other DNB Credit Facilities
Other D N B Credit Facilities [Member]
Derivative Instrument
Derivative Instrument Risk [Axis]
Derivative Contract
Derivative Contract Type [Domain]
Interest Rate Swap
Interest Rate Swap [Member]
Tax refund and indemnification agreement.
Tax Refund Agreement
Tax Refund And Indemnification Agreement [Member]
Information pertaining to the 3.75% Convertible Senior Notes.
Convertible Senior Notes 3.75%
Convertible Senior Notes375 Percent [Member]
Class of Warrant or Right
Class Of Warrant Or Right [Axis]
Class of Warrant or Right
Class Of Warrant Or Right [Domain]
Related to the Carlyle Warrants.
Carlyle Warrants
Carlyle Warrants [Member]
Three point seven five percentage convertible notes.
Three Point Seven Five Percentage Convertible Notes
Three Point Seven Five Percentage Convertible Notes [Member]
Debt Conversion Description
Debt Conversion By Unique Description [Axis]
Debt Conversion, Name
Debt Conversion Name [Domain]
Represents the conversion of convertible senior notes to warrants.
Convertible Senior Notes Converted to Warrants
Convertible Senior Notes Converted To Warrants [Member]
Counterparty Name
Counterparty Name [Axis]
Counterparty Name
Repurchase Agreement Counterparty Name [Domain]
Information pertaining to Carlyle Group.
Carlyle Group
Carlyle Group [Member]
Sea-Cat Crewzer III
Related to a term loan to acquire two vessels.
Term Loan to Acquire Two Vessels
Term Loan To Acquire Two Vessels [Member]
Guarantor Obligations, Nature
Guarantee Obligations By Nature [Axis]
Guarantor Obligations, Nature
Guarantee Obligations Nature [Domain]
Related to a long-term debt obligation.
Long-term Debt Obligation
Longterm Debt Obligation [Member]
Debt agreement maximum borrowing capacity
Debt Agreement Maximum Borrowing Capacity
Agreement extension term, period.
Repayment terms
Debt Instrument Payment Terms
Repayments of long-term debt, total
Extension term of Guaranty
Agreement Extension Term Period
Debt instrument, percentage of financing on total purchase price.
Debt instrument, interest rate
Debt Instrument Interest Rate Stated Percentage
Percentage of amount of loan financed
Debt Instrument Percentage Of Financing On Total Purchase Price
Debt instrument, term of delivery
Debt Instrument Term
Debt instrument extended maturity date.
Application fee paid in conjunction with amendment and amortized over credit facility term.
Line of credit facility, maximum borrowing capacity
Line Of Credit Facility Maximum Borrowing Capacity
Debt instrument, maturity date
Debt Instrument Maturity Date
Debt instrument, extended maturity date
Debt Instrument Extended Maturity Date
Application fee paid in conjunction with amendment and amortized over credit facility term
Application Fee Paid In Conjunction With Amendment And Amortized Over Credit Facility Term
Proceeds from lines of credit
Proceeds From Lines Of Credit
Debt instrument, increase (decrease), net,
Debt Instrument Increase Decrease For Period Net
Purchase price payable for equity method investment in year one.
Purchase price payable for equity method investment in year two.
Purchase price payable for equity method investment in year three.
Purchase price payable for equity method investment in year four.
Percentage of purchase price fixed accrued interest rate for equity method investment in year one.
Percentage of purchase price fixed accrued interest rate for equity method investment in year two.
Percentage of purchase price fixed accrued interest rate for equity method investment in year three.
Percentage of purchase price fixed accrued interest rate for equity method investment in year four.
Equity method investment purchase price amortization period.
Purchase price payable for equity method investment in first year
Purchase Price Payable For Equity Method Investment In Year One
Purchase price payable for equity method investment in second year
Purchase Price Payable For Equity Method Investment In Year Two
Purchase price payable for equity method investment in third year
Purchase Price Payable For Equity Method Investment In Year Three
Purchase price payable for equity method investment in fourth year
Purchase Price Payable For Equity Method Investment In Year Four
Purchase price fixed accrued interest rate in first year
Percentage Of Purchase Price Fixed Accrued Interest Rate For Equity Method Investment In Year One
Purchase price fixed accrued interest rate in second year
Percentage Of Purchase Price Fixed Accrued Interest Rate For Equity Method Investment In Year Two
Purchase price fixed accrued interest rate in third year
Percentage Of Purchase Price Fixed Accrued Interest Rate For Equity Method Investment In Year Three
Purchase price fixed accrued interest rate in fourth year
Percentage Of Purchase Price Fixed Accrued Interest Rate For Equity Method Investment In Year Four
Equity method investment, amortization of purchase price
Equity Method Investment Purchase Price Amortization Period
Debt instrument, maturity period.
Debt instrument, interest rate, effective percentage
Debt Instrument Interest Rate Effective Percentage
Debt instrument, maturity period
Debt Instrument Maturity Period
Repayments of lines of credit
Repayments Of Lines Of Credit
Long-term debt, total
Long Term Debt
Interest payable
Interest Payable Current And Noncurrent
Debt instrument, periodic payment, principal
Debt Instrument Periodic Payment Principal
Loss on extinguishment of debt
Derivative, notional amount
Derivative Notional Amount
Number of additional vessels owned.
Number of additional vessels owned
Number Of Additional Vessels Owned
Estimated cash or cash equivalents tax refunds receivable.
Estimated tax refund receivable
Estimated Cash Or Cash Equivalents Tax Refunds Receivable
Number of vessels purchased from the company.
Number of vessels purchased from the company
Number Of Vessels Purchased From Company
Convertible debt, total
Convertible Debt
Debt instrument, convertible, conversion ratio
Debt Instrument Convertible Conversion Ratio1
Debt instrument, face amount
Debt Instrument Face Amount
Class of warrant or right, exercise price of warrants or rights
Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1
Embedded derivative, fair value of embedded derivative liability
Embedded Derivative Fair Value Of Embedded Derivative Liability
Debt conversion, original debt, amount
Debt Conversion Original Debt Amount1
Debt conversion, converted instrument, shares issued
Debt Conversion Converted Instrument Shares Issued1
Debt instrument, convertible, conversion price
Debt Instrument Convertible Conversion Price1
Warrants and rights outstanding, term
Warrants And Rights Outstanding Term
Proceeds from issuance of debt
Proceeds From Issuance Of Debt
Debt issuance costs, gross
Deferred Finance Costs Gross
Claims recoverable under borrowings percentage f obligations outstanding.
Debt instrument maturity year.
Claims recoverable amount under borrowings.
Claims recoverable amount under borrowings
Claims Recoverable Amount Under Borrowings
Claims recoverable under borrowings percentage of obligations outstanding
Claims Recoverable Under Borrowings Percentage Of Obligations Outstanding
Debt instrument, maturity year
Debt Instrument Maturity Year
Letters of credit outstanding, amount
Letters Of Credit Outstanding Amount
Income Taxes.
Income taxes.
Income Taxes [Table]
Income Taxes [Table]
Income Taxes [Line Items]
Income Taxes [Line Items]
Effective income tax rate reconciliation, at federal statutory Income tax rate, percent
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
Expected cash tax refunds receivable.
Expected to cash tax refunds receivable
Expected Cash Tax Refunds Receivable
Percentage of net operating losses facilitate tax savings.
Transaction fee.
Expected cash tax refunds receivable without restrictions to use.
Expected cash tax refunds receivable with restrictions to use.
Percentage of net operating losses facilitate tax savings
Percentage Of Net Operating Losses Facilitate Tax Savings
Transaction fee
Transaction Fee
Cash tax refunds receivable without restrict to use
Expected Cash Tax Refunds Receivable With Out Restrictions To Use
Cash tax refunds receivable with restrict to use
Expected Cash Tax Refunds Receivable With Restrictions To Use
Income tax benefit and equity in earnings (losses)
Effective Income Tax Rate Reconciliation Equity In Earnings Losses Of Unconsolidated Subsidiary
Income Tax Authority
Income Tax Authority [Axis]
Income Tax Authority
Income Tax Authority [Domain]
United States
Domestic Country [Member]
Foreign
Foreign Country [Member]
Represents information about Eliminations.
Eliminations
Eliminations [Member]
Income before income tax expense (benefit) and equity in earnings of 50% or less owned companies
Federal, current
Current Federal Tax Expense Benefit
State, current
Current State And Local Tax Expense Benefit
Foreign, current
Current Foreign Tax Expense Benefit
Current income tax expense
Federal, deferred
Deferred Federal Income Tax Expense Benefit
State, deferred
Deferred State And Local Income Tax Expense Benefit
Foreign, deferred
Deferred Foreign Income Tax Expense Benefit
Deferred income tax benefit
The amount of increase (decrease) in transition tax liability.
Income tax refunds
Proceeds From Income Tax Refunds
Foreign tax credits
Income Tax Reconciliation Tax Credits Foreign
Expected tax refund
Income Tax Examination Liability Refund Adjustment From Settlement With Taxing Authority
Increase (decrease) in transition tax liability
Increase Decrease In Transition Tax Liability
Amount of current income tax expense (benefit) pertaining to taxable income (loss) related to nonqualified withdrwal of funds from Capital Construction Fund.
Current income tax expense (benefit), nonqualified withdrawal of funds from capital construction fund
Current Income Tax Expense Benefit Nonqualified Withdrwal Of Funds From Capital Construction Fund
Effective income tax rate reconciliation return to provision.
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Effective Income Tax Rate Continuing Operations Tax Rate Reconciliation [Abstract]
Statutory rate
U.S. federal income tax law changes
Effective Income Tax Rate Reconciliation Change In Enacted Tax Rate
SEACOR Holdings share awards to Company personnel
Effective Income Tax Rate Reconciliation Deductions Employee Stock Ownership Plan Dividends
Non-deductible expenses
Effective Income Tax Rate Reconciliation Nondeductible Expense
Exclusion of foreign subsidiaries with accumulated losses and withholding tax
Effective Income Tax Rate Reconciliation Tax Exempt Income
Noncontrolling interests
Effective Income Tax Rate Reconciliation Minority Interest Income Expense
State taxes
Effective Income Tax Rate Reconciliation State And Local Income Taxes
Return to provision
Effective Income Tax Rate Reconciliation Return To Provision
Other
Effective Income Tax Rate Reconciliation Other Adjustments
Effective Tax Rate
Effective Income Tax Rate Continuing Operations
Effective income tax rate reconciliation, percent, total
Deferred tax liabilities:
Deferred Tax Liabilities Net [Abstract]
Property and equipment
Deferred Tax Liabilities Property Plant And Equipment
Investments in 50% or Less Owned Companies
Deferred Tax Liabilities Investment In Noncontrolled Affiliates
Other
Deferred Tax Liabilities Other
Total deferred tax liabilities
Deferred tax assets:
Deferred Tax Assets Net [Abstract]
Federal Net Operating Loss Carryforwards
Deferred Tax Assets Operating Loss Carryforwards
Other
Deferred Tax Assets Other
Total deferred tax assets
Deferred Tax Assets Gross
Valuation Allowance
Deferred Tax Assets Valuation Allowance
Total deferred tax assets
Deferred Tax Assets Net
Net deferred tax liabilities
Deferred Tax Assets Liabilities Net
Interest expense suspended.
Represents expiration period of operating loss carryforwards.
Interest expense suspended deductible.
Interest expense carryforward.
Interest expense suspended limitation percentage.
Represents the percentage of taxable income as a limitation to future utilization of net operating loss.
Interest expense suspended
Interest Expense Suspended
Suspended interest deductible
Interest Expense Suspended Deductible
Interest expense carryforward
Interest Expense Carryforward
Interest expense suspended, limitation percentage
Interest Expense Suspended Limitation Percentage
Operating loss carryforwards, percentage of taxable income, utilization limitation
Operating Loss Carryforwards Percentage Of Taxable Income Utilization Limitation
Operating loss carryforwards, total
Operating Loss Carryforwards
Operating loss carryforwards, expiration period
Operating Loss Carryforwards Expiration Period
Operating loss carryforwards, valuation allowance, total
Operating Loss Carryforwards Valuation Allowance
Derivative [Table]
Derivative [Table]
Hedging Designation
Hedging Designation [Axis]
Hedging Designation
Hedging Designation [Domain]
Not Designated as Hedging Instrument
Nondesignated [Member]
Non current liabilities.
Non-current Liabilities
Non Current Liabilities [Member]
Designated as Hedging Instrument
Designated As Hedging Instrument [Member]
Forward Exchange Contract
Foreign Exchange Forward [Member]
Hedging Relationship
Derivative Instruments Gain Loss By Hedging Relationship [Axis]
Hedging Relationship
Hedging Relationship [Domain]
Cash Flow Hedging
Cash Flow Hedging [Member]
Derivative [Line Items]
Derivative [Line Items]
Derivative Asset
Derivative Assets
Derivative Liability
Derivative Liabilities
Liability Class
Fair Value By Liability Class [Axis]
Fair Value by Liability Class
Fair Value Liabilities Measured On Recurring Basis Unobservable Input Reconciliation By Liability Class [Domain]
Derivative Liabilities
Derivative Financial Instruments Liabilities [Member]
Fair Value Hedging
Fair Value Hedging [Member]
Represents information about Windcat Workboats Ltd.
Windcat Workboats Holdings Ltd
Windcat Workboats Ltd [Member]
Interest rate swap agreement three point one nine five percent.
3.32% Interest Rate Swap Agreement
Interest Rate Swap Agreement Three Point Three Two Percent [Member]
Interest rate swap agreement three point one nine five percent.
3.195% Interest Rate Swap Agreement
Interest Rate Swap Agreement Three Point One Nine Five Percent [Member]
SEACOR 88888.
SEACOR 88/888
S E A C O R88888 [Member]
Recognized gain (loss) on hedged item in fair value hedge
Change In Unrealized Gain Loss On Hedged Item In Fair Value Hedge1
Derivatives notional amount.
Derivative, number of instruments held, total
Derivative Number Of Instruments Held
Derivative, fixed interest rate
Derivative Fixed Interest Rate
Derivative, notional amount
Derivatives Notional Amount
Estimated fair value of derivative instruments from continuing operations
Derivative Fair Value Of Derivative Net
Credit risk adjustment
Derivative Credit Risk Valuation Adjustment Derivative Liabilities
Note 9 - Derivative Instruments and Hedging Strategies - Effect of Derivative Instruments on Other Comprehensive Income (Loss) (Details)
Statement Statement Note9 Derivative Instruments And Hedging Strategies Effect Of Derivative Instruments On Other Comprehensive Income Loss Details
Represents information about joint venture interest rate swap.
Joint Venture Interest Rate Swap
Joint Venture Interest Rate Swap [Member]
Note 9 - Derivative Instruments and Hedging Strategies - Gains (Losses) on Derivative Instruments (Details)
Statement Statement Note9 Derivative Instruments And Hedging Strategies Gains Losses On Derivative Instruments Details
Embedded Derivative Financial Instruments
Embedded Derivative Financial Instruments [Member]
Foreign Exchange Option
Foreign Exchange Option [Member]
Gains (losses) on derivative instruments
Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net
Proceeds to be received from sale of business.
Proceeds to be received from sale of business
Proceeds To Be Received From Sale Of Business
Fair value portion of construction reserve funds.
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Table]
Fair Value Hierarchy and NAV
Fair Value By Fair Value Hierarchy Level [Axis]
Fair Value Hierarchy and NAV
Fair Value Measurements Fair Value Hierarchy [Domain]
Fair Value, Inputs, Level 1
Fair Value Inputs Level1 [Member]
Fair Value, Inputs, Level 2
Fair Value Inputs Level2 [Member]
Fair Value, Inputs, Level 3
Fair Value Inputs Level3 [Member]
Measurement Frequency
Fair Value By Measurement Frequency [Axis]
Measurement Frequency
Fair Value Measurement Frequency [Domain]
Fair Value, Measurements, Recurring
Fair Value Measurements Recurring [Member]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items]
Conversion Option Liability on Convertible Senior Notes
Derivative Instruments And Hedges Liabilities Noncurrent
Construction reserve funds
Construction Reserve Funds Fair Value Disclosure
Derivative, gain (loss) on derivative, net, total
Derivative Gain Loss On Derivative Net
Fair Value By Balance Sheet Grouping [Table]
Fair Value By Balance Sheet Grouping [Table]
Measurement Basis
Fair Value By Measurement Basis [Axis]
Fair Value Disclosure Item Amounts [Default]
Portion At Fair Value Fair Value Disclosure [Member]
Fair Value Measurement
Fair Value Disclosure Item Amounts [Domain]
Reported Value Measurement
Carrying Reported Amount Fair Value Disclosure [Member]
Estimate of Fair Value Measurement
Estimate Of Fair Value Fair Value Disclosure [Member]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Fair Value Balance Sheet Grouping Financial Statement Captions [Line Items]
Cash, cash equivalents and restricted cash
Cash And Cash Equivalents Fair Value Disclosure
Investments, at cost, in 50% or less owned companies (included in other assets)
Cost Method Investments Fair Value Disclosure
Long-term debt, including current portion
Long Term Debt Fair Value
Property and equipment
Property Plant And Equipment Fair Value Disclosure
Equity Method Investments, Fair Value Disclosure
Equity Method Investments Fair Value Disclosure
Seabulk tims I and offshore vessel holdings.
Seabulk Tims I and Offshore Vessel Holdings
Seabulk Tims I And Offshore Vessel Holdings [Member]
Impairment charges
Asset Impairment Charges
Number of investments, at equity, in 50% or less owned companies marked zero due to return of funds that exceeded the carrying value investment and continued losses.
Number of marked investments, at equity, in 50% or less owned companies
Number Of Investments At Equity In Fifty Percent Or Less Owned Companies Marked Zero Due To Return Of Funds That Exceeded The Carrying Value Investment And Continued Losses
Investments, at equity, in 50% or less owned companies
The number of warrants or rights exercised during period.
Stock issued during period shares warrants exercised shares withheld as payment of exercise.
Class Of Warrant Or Right [Table]
Class Of Warrant Or Right [Table]
Warrants transactions.
Warrants Transactions
Warrants Transactions [Member]
Class Of Warrant Or Right [Line Items]
Class Of Warrant Or Right [Line Items]
Class of warrant or right, exercised during period
Class Of Warrant Or Right Exercised During Period
Class of warrant or right, exercise price per share
Class of warrant or right, number of securities called by warrants or rights
Class Of Warrant Or Right Number Of Securities Called By Warrants Or Rights
Class of warrant or right, outstanding
Class Of Warrant Or Right Outstanding
Number of shares withheld in an exercise to purchase warrants as payment for the exercise
Stock Issued During Period Shares Warrants Exercised Shares With Held As Payment Of Exercise
Schedule Of Stock By Class [Table]
Schedule Of Stock By Class [Table]
Represents information about Exchange Warrants.
Exchange Warrants
Exchange Warrants [Member]
Plan Name
Plan Name [Axis]
Plan Name
Plan Name [Domain]
Two Thousand Seventeen equity incentive plan.
2017 Equity Incentive Plan
Two Thousand Seventeen Equity Incentive Plan [Member]
Two Thousand Twenty equity incentive plan.
2020 Equity Incentive Plan
Two Thousand Twenty Equity Incentive Plan [Member]
Falcon global holding member.
Falcon Global Holdings
Falcon Global Holding [Member]
Represents wholly owned subsidiary Seabulk Overseas.
Seabulk Overseas
Seabulk Overseas [Member]
Sale of Stock
Subsidiary Sale Of Stock [Axis]
Sale of Stock
Sale Of Stock Name Of Transaction [Domain]
Private Placement
Private Placement [Member]
Class Of Stock [Line Items]
Class Of Stock [Line Items]
Class of warrant or right, exercised during period
Common shares registered for issuance
Common Stock Capital Shares Reserved For Future Issuance
Common shares authorized for issuance
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Authorized
Common shares remaining available for issuance
Share Based Compensation Arrangement By Share Based Payment Award Number Of Shares Available For Grant
Business acquisition, percentage of voting interests acquired
Business acquisition, exchange for consideration
Business Acquisition Equity Interests Issued Or Issuable Number Of Shares Issued
Ownership percentage by parent
Business combination, consideration transferred, total
Business Combination Consideration Transferred1
Stock Issued During Period, Shares, New Issues
Common stock value
Cumulative Effect of New Accounting Principle in Period of Adoption
Minority Interest [Table]
Minority Interest [Table]
Falcon global member.
Falcon Global
Falcon Global [Member]
Other noncontrolling interests member.
Other Noncontrolling Interests
Other Noncontrolling Interests [Member]
Minority Interest [Line Items]
Minority Interest [Line Items]
Noncontrolling interest
Common Stock
Business acquisition, percentage of voting interests acquired
Noncontrolling Interest, ownership percentage by parent
Net income (loss), including portion attributable to noncontrolling interest, total
Net income (loss) attributable to noncontrolling interest, total
Pension and other postretirement benefits disclosure.
Pension and other postretirement benefits disclosure.
Pension And Other Postretirement Benefits Disclosure [Table]
Pension And Other Postretirement Benefits Disclosure [Table]
Retirement Plan Name
Retirement Plan Name [Axis]
Retirement Plan Name
Retirement Plan Name [Domain]
Related to the United Kingdom Merchant Navy Officers Pension Fund.
United Kingdom Merchant Navy Officers Pension Fund
United Kingdom Merchant Navy Officers Pension Fund [Member]
Retirement Plan Type
Retirement Plan Type [Axis]
Retirement Plan Type
Retirement Plan Type [Domain]
Related to foreign pension plans.
Foreign Pension Plan
Foreign Pension Plan [Member]
Related to the Merchant Navy Ratings Pension Fund.
Merchant Navy Ratings Pension Fund
Merchant Navy Ratings Pension Fund [Member]
Related to other defined contribution plan.
Other Defined Contribution Plan
Other Defined Contribution Plan [Member]
Pension And Other Postretirement Benefits Disclosure [Line Items]
Pension And Other Postretirement Benefits Disclosure [Line Items]
Defined contribution plan, employer matching contribution, percent of employees' gross pay
Defined Contribution Plan Employer Matching Contribution Percent
Defined Contribution Plan, Maximum Annual Contributions Per Employee, Amount
Defined Contribution Plan Maximum Annual Contributions Per Employee Amount
Pension and other postretirement benefit invoice.
Amount of total funding deficit for pension and other post-retirement benefit plans.
Pension and other postretirement benefits cost (reversal of cost), total
Pension And Other Postretirement Benefit Expense
Pension and other postretirement benefits invoice
Pension And Other Postretirement Benefit Invoice
Pension and other post-retirement benefit plans, total funding deficit
Pension And Other Postretirement Benefit Plans Total Funding Deficit
Multiemployer plan, contributions by employer
Multiemployer Plan Employer Contribution Cost
Defined contribution plan, cost
Defined Contribution Plan Cost Recognized
Percentage of number of common stock shares outstanding.
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]
Equity incentive plan 2017.
2017 Equity Incentive Plan
Equity Incentive Plan2017 [Member]
Employee stock purchase plan.
Employee Stock Purchase Plan
Employee Stock Purchase Plan [Member]
Two thousand seventeen and two thousand twenty plan.
2017 Plan and 2020 Plan
Two Thousand Seventeen And Two Thousand Twenty Plan [Member]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share-based compensation arrangement by share-based payment award, number of shares authorized
Share-based compensation arrangement by share-based payment award, number of shares available for grant
Percentage of number of common stock shares outstanding
Percentage Of Number Of Common Stock Shares Outstanding
Share-based compensation arrangement by share-based payment award, award vesting period
Share Based Compensation Arrangement By Share Based Payment Award Award Vesting Period1
The amount of payments for the distribution of restricted stock in connection with a spin-off.
The number of restricted stock distributed to the company in connection with a spin-off.
Payments for distribution of restricted stock, spin-off
Payments For Distribution Of Restricted Stock Spin Off
Distribution of restricted stock in connection with spin-off
Distribution Of Restricted Stock In Connection With Spinoff
Share-based compensation arrangement by share-based payment award, discount from market price, purchase date
Share Based Compensation Arrangement By Share Based Payment Award Discount From Market Price Purchase Date
Period of common stock reserved for issuance
Sharebased Compensation Arrangement By Sharebased Payment Award Expiration Period
Director stock awards.
Director Stock Awards
Director Stock Awards [Member]
Outstanding as of the beginning of year (in shares)
Granted (in shares)
Vested (in shares)
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period
Forfeited (in shares)
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeited In Period
Outstanding as of the end of year (in shares)
Outstanding as of the beginning of year (in shares)
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Number
Granted (in shares)
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross
Exercised (in shares)
Forfeited (in shares)
Share Based Compensation Arrangement By Share Based Payment Award Options Forfeitures In Period
Outstanding as of the end of year (in shares)
Performance Stock
Number of shares outstanding
Allocated share-based compensation expense, total
Allocated Share Based Compensation Expense
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, total
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized
Employee service share-based compensation, nonvested awards, compensation cost not yet recognized, period for recognition
Employee Service Share Based Compensation Nonvested Awards Total Compensation Cost Not Yet Recognized Period For Recognition1
Share-based compensation arrangement by share-based payment award, equity instruments other than options, grants in period, weighted average grant date fair value
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period Weighted Average Grant Date Fair Value
Share-based compensation arrangement by share-based payment award, options, outstanding, exercise price, ending balance
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Weighted Average Exercise Price
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected dividend rate
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Dividend Rate
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected volatility rate
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Expected Volatility Rate
Share-based compensation arrangement by share-based payment award, fair value assumptions, discount for postvesting restrictions
Share Based Compensation Arrangement By Share Based Payment Award Fair Value Assumptions Discount For Postvesting Restrictions
Share-based compensation arrangement by share-based payment award, fair value assumptions, expected term
Sharebased Compensation Arrangement By Sharebased Payment Award Fair Value Assumptions Expected Term1
Share-based compensation arrangement by share-based payment award, options, exercises in period, intrinsic value
Share Based Compensation Arrangement By Share Based Payment Award Options Exercises In Period Total Intrinsic Value
Non-Vested, weight average grant price (in dollars per share)
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Weighted Average Grant Date Fair Value
Granted, weight average grant price (in dollars per share)
Vested, shares (in shares)
Vested, weight average grant price (in dollars per share)
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Vested In Period Weighted Average Grant Date Fair Value
Forfeited, weight average grant price (in dollars per share)
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Forfeitures Weighted Average Grant Date Fair Value
Non-Vested, weight average grant price (in dollars per share)
Non-Vested, shares (in shares)
Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares
Non-Vested, weight average grant price (in dollars per share)
Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Weighted Average Grant Date Fair Value
Granted, shares (in shares)
Granted, weight average grant price (in dollars per share)
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Weighted Average Grant Date Fair Value
Exercise of options (in shares)
Exercised (in dollars per share)
Share Based Compensation Arrangements By Share Based Payment Award Options Exercises In Period Weighted Average Exercise Price
Forfeited, shares (in shares)
Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Options Forfeited Number Of Shares
Forfeited, weight average grant price (in dollars per share)
Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Options Forfeited Weighted Average Grant Date Fair Value
Non-Vested, shares (in shares)
Non-Vested, weight average grant price (in dollars per share)
Exercisable, shares (in shares)
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Number
Exercisable, weight average grant price (in dollars per share)
Share Based Compensation Arrangement By Share Based Payment Award Options Exercisable Weighted Average Exercise Price
Share-based compensation arrangement by share-based payment award, options, exercisable, weighted average remaining contractual term
Sharebased Compensation Arrangement By Sharebased Payment Award Options Exercisable Weighted Average Remaining Contractual Term1
Share-based compensation arrangement by share-based payment award, options, outstanding, intrinsic value
Share Based Compensation Arrangement By Share Based Payment Award Options Outstanding Intrinsic Value
Schedule Of Related Party Transactions By Related Party [Table]
Schedule Of Related Party Transactions By Related Party [Table]
Related Party
Related Party Transactions By Related Party [Axis]
Related Party
Related Party [Domain]
Information pertaining to SEACOR Holdings.
SEACOR Holdings
S E A C O R Holdings [Member]
Related Party Transaction
Related Party Transaction [Axis]
Related Party Transaction
Related Party Transaction [Domain]
Transition services agreement.
Transition Services Agreement
Transition Services Agreement [Member]
Class of Stock
Statement Class Of Stock [Axis]
Class of Stock
Class Of Stock [Domain]
Series A Preferred Stock
Series A Preferred Stock [Member]
Long-term Debt, Type
Longterm Debt Type [Axis]
Long-term Debt, Type
Longterm Debt Type [Domain]
Second Lien Debt.
Second Lien Debt
Second Lien Debt [Member]
Officer
Officer [Member]
Title of Individual
Title Of Individual [Axis]
Title of Individual
Title Of Individual With Relationship To Entity [Domain]
Fabrikant.
Fabrikant
Fabrikant [Member]
Llorca.
Llorca
Llorca [Member]
Gellert.
Gellert
Gellert [Member]
Fabrikant, Gellert and Llorca.
Fabrikant, Gellert and Llorca
Fabrikant Gellert And Llorca [Member]
CMB N.V.
CMB N.V.
C M B N V [Member]
Represents the warrants issued in a private placement.
Warrants Issued In Private Placement
Warrants Issued In Private Placement [Member]
Lender non recourse.
Lender Non Recourse
Lender Non Recourse [Member]
BRAZIL
BRAZIL
UP Offshore’s.
UP Offshore’s.
U P Offshores [Member]
Talos energy, Inc.
Talos Energy, Inc
Talos Energy Inc [Member]
Related Party Transaction [Line Items]
Related Party Transaction [Line Items]
Guarantor Obligations, Maximum Exposure, Undiscounted
Guarantee Obligations Maximum Exposure
Related Party Transaction, Rate
Related Party Transaction Rate
Interest Expense, Related Party
Interest Expense Related Party
Tax refunds restricted cash.
Tax refunds restricted cash
Tax Refunds Restricted Cash
Related Party Transaction, Amounts of Transaction
Related Party Transaction Amounts Of Transaction
Proceeds from issuance of additional redeemable preferred stock.
Proceeds from Sale of Interest in Partnership Unit
Proceeds From Sale Of Interest In Partnership Unit
Proceeds from Issuance of Redeemable Preferred Stock
Proceeds From Issuance Of Redeemable Preferred Stock
Proceeds From issuance of additional redeemable preferred stock
Proceeds From Issuance Of Additional Redeemable Preferred Stock
Limited Partners' Capital Account, Total
Limited Partners Capital Account
General Partners' Capital Account, Total
General Partners Capital Account
Represents the ownership percentage of a consolidated entity.
Ownership Percentage
Ownership Percentage
Business combination, consideration transferred, total
Percentage sale of equity.
Percentage sale of equity
Percentage Sale Of Equity
Interest rate term
Debt Instrument Interest Rate Terms
Percentage of convertible notes converted into common stock.
Percentage of convertible notes converted into common stock
Percentage Of Convertible Notes Converted Into Common Stock
Debt instrument, convertible, terms of conversion feature
Debt Instrument Convertible Terms Of Conversion Feature
Debt indebtedness.
Indebtedness
Debt Indebtedness
Commitment to fund purchase
Long Term Purchase Commitment Amount
Loaned commitment amount
Notes Payable Related Parties Current And Noncurrent
Revenues
Commitments and contingencies.
Commitments and contingencies.
Commitments And Contingencies [Table]
Commitments And Contingencies [Table]
Platform supply vessel.
Platform Supply Vessels
Platform Supply Vessel [Member]
FSV Offshore Support Vessels
Litigation Case
Litigation Case [Axis]
Litigation Case
Litigation Case Type [Domain]
Deficiency notice.
Deficiency Notice
Deficiency Notice [Member]
Commitments And Contingencies [Line Items]
Commitments And Contingencies [Line Items]
Unrecorded unconditional purchase obligation, total
Unrecorded Unconditional Purchase Obligation Balance Sheet Amount
Unrecorded unconditional purchase obligation, maximum quantity
Unrecorded Unconditional Purchase Obligation Maximum Quantity
Unrecorded unconditional purchase obligation, due within one years
Unrecorded Unconditional Purchase Obligation Balance On First Anniversary
Unrecorded unconditional purchase obligation, due within two years
Unrecorded Unconditional Purchase Obligation Balance On Second Anniversary
Unrecorded unconditional purchase obligation due within four years
Unrecorded Unconditional Purchase Obligation Balance On Fourth Anniversary
Cost allocation percentage.
Cost allocation percentage
Cost Allocation Percentage
Potential range of levies
Loss Contingency Estimate Of Possible Loss
Number of customer.
Schedule Of Segment Reporting Information By Segment [Table]
Schedule Of Segment Reporting Information By Segment [Table]
Concentration Risk Type
Concentration Risk By Type [Axis]
Concentration Risk Type
Concentration Risk Type [Domain]
Customer Concentration Risk
Customer Concentration Risk [Member]
Geographic Concentration Risk
Geographic Concentration Risk [Member]
Concentration Risk Benchmark
Concentration Risk By Benchmark [Axis]
Concentration Risk Benchmark
Concentration Risk Benchmark [Domain]
Sales Revenue, Net
Sales Revenue Net [Member]
Customer
Major Customers [Axis]
Customer
Name Of Major Customer [Domain]
Seacor Marine Arabia LLC.
Seacor Marine Arabia LLC
Seacor Marine Arabia L L C [Member]
Zamil Offshore.
Zamil Offshore
Zamil Offshore [Member]
Ten largest customers.
Ten Largest Customers
Ten Largest Customers [Member]
Exxon Mobil.
Exxon Mobil
Exxon Mobil [Member]
Saudi Aramco.
Saudi Aramco
Saudi Aramco [Member]
Stockholders' Equity
Stockholders Equity Total [Member]
Non-US
Non Us [Member]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Revenue from contract with customer, including assessed tax
Concentration risk, percentage
Concentration Risk Percentage1
Number of customer
Number Of Customer
Income (loss) from equity method investments
The aggregate total of expenses of managing and administering the affairs of an entity, including affiliates of the reporting entity, including short term lease expenses, which are not directly or indirectly associated with the manufacture, sale or creation of a product or product line.
The amount of assets, excluding corporate assets.
Europe Continuing Operations
Information pertaining to time charter.
Time Charter
Time Charter [Member]
Information pertaining to bareboat charter.
Bareboat Charter
Bareboat Charter [Member]
Other marine services.
Other Marine Services
Other Marine Services [Member]
Information pertaining to personnel services.
Personnel
Personnel [Member]
Information pertaining to repairs and maintenance services.
Repairs and Maintenance
Repairs And Maintenance [Member]
Information pertaining to drydocking services.
Drydocking
Drydocking [Member]
Information pertaining to insurance and loss reserves.
Insurance and Loss Reserves
Insurance And Loss Reserves [Member]
Information pertaining to fuel, lubes and supplies.
Fuel, Lubes and Supplies
Fuel Lubes And Supplies [Member]
Information pertaining to other direct costs and expenses.
Other Direct Costs and Expenses
Other Direct Costs And Expenses [Member]
Nature of Expense
Nature Of Expense [Axis]
Interim Period, Costs Not Allocable
Interim Period Costs Not Allocable [Domain]
Information pertaining leased-in equipment.
Leased In Equipment
Leased In Equipment [Member]
Direct Costs and Expenses
Cost Of Goods And Services Sold And Adjustment
Direct Vessel (Loss) Profit
Gross Profit
Operating expenses
Operating Expenses
Administrative and general
General And Administrative Expense Including Short Term Lease Expense
Other Costs and Expenses
Other Cost And Expense Operating
Operating Loss
Total Assets
Assets Excluding Corporate Assets
Consolidation Items
Consolidation Items [Axis]
Consolidation Items
Consolidation Items [Domain]
Corporate, Non-Segment
Corporate Non Segment [Member]
Assets, Total
Assets held for sale
Assets Of Disposal Group Including Discontinued Operation
Disposal group including discontinued operation income loss before equity method investments after tax.
Disposal group including discontinued operation income (loss) from equity method investments.
Disposal group including discontinued operation income loss before income taxes and income loss from equity method investments.
Disposal group including discontinued operation income tax expense (benefit).
Disposal group including discontinued operation other nonoperating income expense.
Disposal group including discontinued operation other net.
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Table]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Table]
Boston Putford Offshore Safety Limited.
BPOS
Boston Putford Offshore Safety Limited [Member]
Disposal Group Classification
Disposal Group Classification [Axis]
Disposal Group Classification
Disposal Group Classification [Domain]
Discontinued Operations, Held-for-sale
Discontinued Operations Heldforsale [Member]
Other revenue.
Other Revenue
Other Revenue [Member]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Income Statement Balance Sheet And Additional Disclosures By Disposal Groups Including Discontinued Operations [Line Items]
Assets from Discontinued Operations:
Assets Of Disposal Group Including Discontinued Operation [Abstract]
Current assets
Net property and equipment
Disposal Group Including Discontinued Operation Property Plant And Equipment Noncurrent
Non-current assets
Disposal Group Including Discontinued Operation Assets Noncurrent
Assets from discontinued operations
Liability from Discontinued Operations:
Liabilities Of Disposal Group Including Discontinued Operation [Abstract]
Long-term liabilities
Liabilities Of Disposal Group Including Discontinued Operation Noncurrent
Disposal Group, Including Discontinued Operation, Liabilities
Liabilities Of Disposal Group Including Discontinued Operation
Disposal group including discontinued operation lease expense.
Disposal group including discontinued operation gain (loss) on assets disposition and impairments net.
Disposal group discontinued operation operating revenue.
Disposal group discontinued operation costs and expenses.
Disposal group including discontinued operation other nonoperating income expense.
Operating Revenues:
Disposal Group Discontinued Operation Operating Revenue [Abstract]
Operating Revenues
Disposal Group Including Discontinued Operation Revenue
Costs and Expenses:
Disposal Group Discontinued Operation Costs And Expenses [Abstract]
Operating
Disposal Group Including Discontinued Operation Operating Expense
Direct Vessel Profit
Disposal Group Including Discontinued Operation Gross Profit Loss
General and Administrative Expenses
Disposal Group Including Discontinued Operation General And Administrative Expense
Lease Expense
Disposal Group Including Discontinued Operation Lease Expense
Depreciation
Disposal Group Including Discontinued Operation Depreciation And Amortization
Gains on Asset Dispositions and Impairments, Net
Disposal Group Including Discontinued Operation Gain Loss On Assets Disposition And Impairments Net
Operating Income (Loss)
Disposal Group Including Discontinued Operation Operating Income Loss
Other Income (Expense)
Disposal Group Including Discontinued Operation Other Nonoperating Income Expense [Abstract]
Interest income
Disposal Group Including Discontinued Operation Interest Income
Interest expense
Disposal Group Including Discontinued Operation Interest Expense
Foreign currency translation (loss) gain
Disposal Group Including Discontinued Operation Foreign Currency Translation Gains Losses
Other, net
Disposal Group Including Discontinued Operation Other Net
Other Income (Expense)
Disposal Group Including Discontinued Operation Other Nonoperating Income Expense
Operating Income (Loss) Before Equity Earnings of 50% or Less Owned Companies, Net of Tax
Disposal Group Including Discontinued Operation Income Loss Before Income Taxes And Income Loss From Equity Method Investments
Income Tax (Benefit) Expense
Disposal Group Including Discontinued Operation Income Tax Expense Benefit
Operating Income (Loss) Before Equity Earnings of 50% or Less Owned Companies
Disposal Group Including Discontinued Operation Income Loss Before Equity Method Investments After Tax
Equity in Earnings of 50% or Less Owned Companies, Net of Tax
Disposal Group Including Discontinued Operation Income Loss From Equity Method Investments
Net Income (Loss) from Discontinued Operations
Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax
Net (Loss) Income:
Net Income Loss [Abstract]
Continuing Operations
Discontinued Operations
Income Loss From Discontinued Operations Net Of Tax Attributable To Reporting Entity
Net Loss attributable to SEACOR Marine Holdings Inc:
Basic and Diluted (Loss) Income Per Common Share of SEACOR Marine Holdings Inc.
Allowance for credit loss reserves (deducted from trade and notes receivable)
Valuation Allowances And Reserves Balance
Allowance for credit loss reserves (deducted from trade and notes receivable)
Valuation Allowances And Reserves Reserves Of Businesses Acquired
Allowance for credit loss reserves (deducted from trade and notes receivable)
Valuation Allowances And Reserves Adjustments
Allowance for credit loss reserves (deducted from trade and notes receivable)
Valuation Allowances And Reserves Deductions
Allowance for credit loss reserves (deducted from trade and notes receivable)