Entity Central Index Key
Lessee operating lease liability payment due after year four.
Finance lease liability payments due after year four.
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 Filer Category
Entity Filer Category
Entity Small Business
Entity Small Business
Entity Emerging Growth Company
Entity Emerging Growth Company
Entity Ex Transition Period
Entity Ex Transition Period
Entity Common Stock, Shares Outstanding
Entity Common Stock Shares Outstanding
Entity Current Reporting Status
Entity Current Reporting Status
Entity Shell Company
Entity Shell Company
Entity File Number
Entity File Number
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
Entity Incorporation, State or Country Code
Entity Incorporation State Country Code
Entity Interactive Data Current
Entity Interactive Data Current
Title of 12(b) Security
Security12b Title
Security Exchange Name
Security Exchange Name
Document Quarterly Report
Document Quarterly Report
Document Transition Report
Document Transition Report
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.
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 accounts of $724 and $582 in 2021 and 2020, respectively
Accounts Receivable Net Current
Other
Other Receivables Net Current
Receivable 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
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 financing 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
Deferred revenue and unearned revenue
Contract With Customer Liability Current
Accrued capital, repair, and maintenance expenditures
Accrued Capital Repair And Maintenance Expenditures 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 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 Financing 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]
Common stock, $.01 par value, 60,000,000 shares authorized; 24,503,380 and 23,504,050 shares issued in 2021 and 2020, respectively
Common Stock Value
Additional paid-in capital
Additional Paid In Capital Common Stock
Retained Earnings (Accumulated deficit)
Retained Earnings Accumulated Deficit
Shares held in treasury of 127,738 and 73,284, respectively, at cost
Treasury Stock Value
Accumulated other comprehensive gain, 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
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.
Gain (loss) from return of investments and other net.
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 (loss) from continuing operations net of tax per basic and diluted share.
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
Gains (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
Gain on Debt Extinguishment
Gains Losses On Extinguishment Of Debt
Derivative gains, net
Gain Loss On Derivative Instruments Net Pretax
Foreign currency gains (losses), net
Foreign Currency Transaction Gain Loss Before Tax
Gain from return of investments in 50% or less owned companies and other, net
Gain Loss From Return Of Investments And Other Net
Nonoperating income expense
Nonoperating Income Expense
(Loss) Income from Continuing Operations Before Income Tax Benefit and Equity in Earnings 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
(Loss) Income from Continuing Operations Before Equity in Earnings of 50% or Less Owned Companies
Income Loss From Continuing Operations Before Equity Method Investments And Noncontrolling Interest After Tax
Equity in Earnings Gains (Losses) of 50% or Less Owned Companies
Income Loss From Equity Method Investments
(Loss) Income from Continuing Operations
Income Loss From Continuing Operations
Income on Discontinued Operations, Net of Tax (see Note 12)
Income Loss From Discontinued Operations Net Of Tax
Net (Loss) Income
Profit Loss
Net Income (Loss) Attributable to Noncontrolling Interests in Subsidiaries
Net Income Loss Attributable To Noncontrolling Interest
Net (Loss) Income Attributable to SEACOR Marine Holdings Inc.
Net Income Loss
Net Earnings (Loss) Per Common Share from Continuing Operations:
Income Loss From Continuing Operations Net Of Tax Per Basic And Diluted Share [Abstract]
Basic
Income Loss From Continuing Operations Per Basic Share
Diluted
Income Loss From Continuing Operations Per Diluted Share
Net Earnings (Loss) Per Share from Discontinued Operations:
Income Loss From Discontinued Operations And Disposal Of Discontinued Operations Net Of Tax Per Basic And Diluted Share [Abstract]
Basic
Income Loss From Discontinued Operations Net Of Tax Per Basic Share
Diluted
Income Loss From Discontinued Operations Net Of Tax Per Diluted Share
Net Earnings (Loss) per Share:
Earnings Per Share Basic And Diluted [Abstract]
Basic
Earnings Per Share Basic
Diluted
Earnings Per Share Diluted
Weighted Average Common Stock and Warrants Outstanding:
Weighted Average Number Of Shares Outstanding [Abstract]
Basic
Weighted Average Number Of Shares Outstanding Basic
Diluted
Weighted Average Number Of Diluted Shares Outstanding
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 Investments1
Equity Method Investments1 [Member]
Statement [Line Items]
Statement [Line Items]
Net (Loss) Income
Other Comprehensive (Loss) Income:
Other Comprehensive Income Loss Before Tax Period Increase Decrease [Abstract]
Foreign currency translation (losses) gains
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 gains (losses) on cash flow hedges
Other Comprehensive Income Loss Reclassification Adjustment From A O C I On Derivatives Before Tax
Other comprehensive income (loss)
Other Comprehensive Income Loss Before Tax
Comprehensive (Loss) Income
Comprehensive Income Net Of Tax Including Portion Attributable To Noncontrolling Interest
Comprehensive Income (Loss) Attributable to Noncontrolling Interests in Subsidiaries
Comprehensive Income Net Of Tax Attributable To Noncontrolling Interest
Comprehensive (Loss) Income 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 earnings
Percentage Of Owned Companies Derivative Losses On Cash Flow Hedges Reclassification To Equity In Earnings
Sale of Windcat Workboats.
Stock repurchased during period value exercise of warrants.
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 (Accumulated Deficit) [Member]
Retained Earnings [Member]
Accumulated Other Comprehensive Gain (Loss) [Member]
Accumulated Other Comprehensive Income [Member]
Non-Controlling Interests In Subsidiaries [Member]
Noncontrolling Interest [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
Forfeiture of employee share awards
Stock Issued During Period Value Restricted Stock Award Forfeitures
Forfeiture of employee share awards (in shares)
Stock Issued During Period Shares Restricted Stock Award Forfeited
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
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 Warrants
Stock Repurchased During Period Value Exercise Of Warrants
Stock repurchased during period shares 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
Sale of Windcat Workboats
Sale Of Windcat Workboats
Acquisition of consolidated joint venture
Stock Granted During Period Value Sharebased Compensation
Stock granted during period shares share based compensation.
Acquisition of consolidated joint venture (in shares)
Stock Granted During Period Shares Share Based Compensation
Net (loss) income
Other comprehensive loss
Other Comprehensive Income Loss Net Of Tax
Balance
Balance (in shares)
Gain (loss) from return of investments.
Proceeds from interest on finance leases.
The net amount of cash paid for or received to settle derivatives during the period not designated as hedges.
Construction reserve funds transferred to short term cash.
Payments to acquire proceeds from divestiture interest in joint venture.
Proceeds from sale of property net of transaction costs and cash sold.
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 debt related to debt settlement.
Increase (Decrease) in capital expenditures in accounts payable and accrued liabilities.
Statement Of Cash Flows [Abstract]
Cash Flows from Continuing Operating Activities:
Net Cash Provided By Used In Operating Activities Continuing Operations [Abstract]
Net Income (Loss)
Income Loss From Continuing Operations Including Portion Attributable To Noncontrolling Interest
Adjustments to reconcile net loss to net cash provided by (used in) operating activities:
Adjustments Noncash Items To Reconcile Net Income Loss To Cash Provided By Used In Operating Activities [Abstract]
Deferred financing costs amortization
Amortization Of Financing Costs
Stock-based compensation expense
Share Based Compensation
Debt discount amortization
Amortization Of Debt Discount Premium
Bad debt recoveries
Provision For Doubtful Accounts
(Gain) Loss from equipment sales, retirements or impairments
Gain on the Sale of Windcat Workboats
Gain Loss On Disposition Of Assets1
Gain from return of investments in 50% or less owned companies
Gain Loss From Return Of Investments
Gain on Debt Extinguishment
Gains Losses On Extinguishment Of Debt Before Write Off Of Deferred Debt Issuance Cost
Derivative gains
Interest on Finance Lease
Proceeds From Interest On Finance Leases
Cash settlement payments on derivative transactions, net
Payments For Proceeds From Derivative Instruments Operating Activities
Currency losses
Deferred income taxes
Deferred Income Tax Expense Benefit
Equity Earnings
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 provided by (used in) operating activities
Net Cash Provided By Used In Operating Activities Continuing Operations
Cash Flows from Continuing 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
Construction reserve funds utilized
Payments For Proceeds From Other Investing Activities
Construction reserve funds transferred to short-term cash
Construction Reserve Funds Transferred To Short Term Cash
Purchase of subsidiary from joint venture
Payments To Acquire Proceeds From Divestiture Interest In Joint Venture
Proceeds from sale of Windcat Workboats, net of transaction costs and cash sold
Proceeds From Sale Of Property Net Of Transaction Costs And Cash Sold
Investments in and advances to 50% or less owned companies
Payments To Acquire Equity Method Investments
Excess distributions from equity investees
Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital
Principal payments on notes due from equity investees
Repayment Of Notes Receivable From Related Parties
Net cash provided by investing activities
Net Cash Provided By Used In Investing Activities Continuing Operations
Cash Flows from Continuing Financing Activities:
Net Cash Provided By Used In Financing Activities Continuing Operations [Abstract]
Payments on long-term debt
Repayments Of Long Term Debt
Payments on debt extinguishment cost
Payments Of Debt Extinguishment Costs
Payments on finance lease
Finance Lease Principal Payments
Proceeds from exercise of warrant options
Proceeds From Warrant Exercises
Issuance of stock
Proceeds From Issuance Of Common Stock
Net cash used in financing activities
Net Cash Provided By Used In Financing Activities Continuing Operations
Effects of Exchange Rate Changes on Cash and Cash Equivalents
Effect Of Exchange Rate On Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents
Net Increase (Decrease) in Cash, Restricted Cash and Cash Equivalents
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 (Decrease) 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 Increase (Decrease) in Cash, Restricted Cash and Cash Equivalents
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect
Cash, Restricted Cash and Cash Equivalents, Beginning of Period
Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Including Disposal Group And Discontinued Operations
Cash, Restricted Cash and Cash Equivalents, End of Period
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
Decrease in debt related to debt settlement
Increase Decrease In Debt Related To Debt Settlement
Decrease in capital expenditures in accounts payable and accrued liabilities
Increase Decrease In Capital Expenditures In Accounts Payable And Accrued Liabilities
Basis of presentation and accounting policies.
Basis Of Presentation And Accounting Policies [Abstract]
Basis of Presentation and Accounting Policies
Basis Of Accounting
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]
Debt Disclosure [Abstract]
Long Term Debt
Long Term Debt [Text Block]
Leases [Abstract]
Leases
Lessee Operating Leases [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]
Commitments And Contingencies Disclosure [Abstract]
Commitments and Contingencies
Commitments And Contingencies Disclosure [Text Block]
Disclosure Of Compensation Related Costs Sharebased Payments [Abstract]
Stock Based Compensation
Disclosure Of Compensation Related Costs Share Based Payments [Text Block]
Segment Reporting [Abstract]
Segment Information
Segment Reporting Disclosure [Text Block]
Discontinued Operations And Disposal Groups [Abstract]
Discontinued Operations
Disposal Groups Including Discontinued Operations Disclosure [Text Block]
Disclosure of accounting policy pertaining to recently adopted accounting standards.
Accounting Policies [Abstract]
Recently Adopted Accounting Standards
Recently Adopted Accounting Standards Policy [Text Block]
Recently Issued Accounting Standards
New Accounting Pronouncements 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 and Cash Equivalents
Cash And Cash Equivalents Policy [Text Block]
Trade and Other Receivables
Receivables 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]
Income Taxes
Income Tax Policy [Text Block]
Accumulated Other Comprehensive Income (Loss)
Comprehensive Income Policy Policy [Text Block]
Earnings (Loss) Per Share
Earnings Per Share Policy [Text Block]
Schedule of Deferred Revenues
Deferred Revenue By Arrangement Disclosure [Text Block]
Schedule of Accumulated Other Comprehensive Income (Loss)
Schedule Of Comprehensive Income Loss Table [Text Block]
Schedule of gain loss on sale of property plant and equipment.
Schedule of Gain on Sale of Windcat Workboats
Schedule Of Gain Loss On Sale Of Property Plant And Equipment Table [Text Block]
Equity Method Investments
Equity Method Investments [Text Block]
Schedule of Long-term Debt Obligations
Schedule Of Debt Instruments [Text Block]
Schedule of Gain on Transactions Under Conditional Payoff Agreement
Schedule Of Debtor Troubled Debt Restructuring Current Period [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 Effective Income Tax Rate Reconciliation
Schedule Of Effective Income Tax Rate Reconciliation Table [Text Block]
Schedule of Fair Value of Derivative Assets and Liabilities
Schedule Of Derivative Instruments In Statement Of Financial Position Fair Value [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]
Summary of Transactions in Connection with Equity Incentive Plans
Schedule Of Share Based Compensation Activity Table [Text Block]
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]
Basis of presentation and accounting policies.
Basis of presentation and accounting policies.
Basis Of Presentation And Accounting Policies [Table]
Basis Of Presentation And Accounting Policies [Table]
Accounting Standards Update
Adjustments For New Accounting Pronouncements [Axis]
Accounting Standards Update
Type Of Adoption [Member]
Accounting Standards Update 2019-12
Accounting Standards Update201912 [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
Prepaid Charter Modification And Reservation Fees [Member]
Demobilization of an offshore support vessel.
Demobilization of Offshore Support Vessel
Demobilization Of Offshore Support Vessel [Member]
Long-Lived Tangible Asset
Property Plant And Equipment By Type [Axis]
Long-Lived Tangible Asset
Property Plant And Equipment Type [Domain]
Offshore support vessels member.
Offshore Support Vessels
Offshore Support Vessels [Member]
Specialty vessel member.
Specialty Vessel
Specialty Vessel [Member]
Antidilutive Securities
Antidilutive Securities Excluded From Computation Of Earnings Per Share By Antidilutive Securities [Axis]
Antidilutive Securities, Name
Antidilutive Securities Name [Domain]
Convertible Senior Note
Convertible Debt Securities [Member]
Restricted Stock
Restricted Stock [Member]
Employee Stock Option
Employee Stock Option [Member]
Revision of Prior Period
Restatement [Axis]
Revision of Prior Period
Restatement [Domain]
Prior Periods Adjustment
Revision Of Prior Period Error Correction Adjustment [Member]
Basis Of Presentation And Accounting Policies [Line Items]
Basis Of Presentation And Accounting Policies [Line Items]
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, immaterial effect [true false]
Change In Accounting Principle Accounting Standards Update Immaterial Effect
Equity method investment, ownership percentage
Equity Method Investment Ownership Percentage
Balance at beginning of period
Contract With Customer Liability
Revenues deferred during the period
Deferred Revenue Additions
Revenues recognized during the period
Deferred Revenue Revenue Recognized1
Balance at end of period
Contract with customer, liability
Contract with customer, liability, revenue recognized
Contract With Customer Liability Revenue Recognized
Contract with customer liability current
Construction reserve funds current.
Construction reserve funds, current
Construction Reserve Funds Current
Estimated useful life (Year)
Property Plant And Equipment Useful Life
Capitalized interest costs, including allowance for funds used during construction, total
Interest Costs Incurred Capitalized
Additional impairment of right-to-use assets.
Impairment of long-lived assets four owned liftboats.
Impairment of long-lived assets two leased-in liftboat.
Impairment of long-lived assets owned or leased in vessels
Impairment Of Long Lived Assets Held For Use
Impairment of long-lived assets four owned liftboats
Impairment Of Long Lived Assets Four Owned Liftboats
Impairment of long-lived assets two leased-in liftboats
Impairment Of Long Lived Assets Two Leased In Liftboat
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
Effective income tax rate reconciliation, percent, total
Effective Income Tax Rate Continuing Operations
Accumulated Other Comprehensive Income Loss [Table]
Accumulated Other Comprehensive Income Loss [Table]
Foreign Currency Translation Adjustments Attributable to Parent
Accumulated Translation Adjustment [Member]
Derivative Losses on Cash Flow Hedges, net Attributable to Parent
Accumulated Gain Loss Net Cash Flow Hedge Parent [Member]
AOCI Attributable to Parent
Accumulated Other Comprehensive Income Loss [Line Items]
Accumulated Other Comprehensive Income Loss [Line Items]
Other comprehensive loss
Class of warrant or right, exercise price of warrants or rights
Class Of Warrant Or Right Exercise Price Of Warrants Or Rights1
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
Incremental Common Shares Attributable to Dilutive Effect of Share-based Payment Arrangements
Incremental Common Shares Attributable To Share Based Payment Arrangements
The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets, including fair value hedges.
Represents the number of of equipment acquired.
Represents the number of equipment sold.
Setoff of debt under line of credit.
Property plant equipment consideration transferred.
Amount of cash inflow for receipts of deposits.
Schedule Of Property Plant And Equipment [Table]
Schedule Of Property Plant And Equipment [Table]
Member stands for platform supply vessels ("PSVs").
Platform Supply Vessels
Platform Supply Vessels [Member]
Fast support vessels member.
Fast Support Vessels
Fast Support Vessels [Member]
Platform supply vessels and fast support vessels.
Platform Supply Vessels and Fast Support Vessels
Platform Supply Vessels And Fast Support Vessels [Member]
Information pertaining to anchor handling towing supply.
Anchor Handling Towing Supply
Anchor Handling Towing Supply Vessel [Member]
Specialty vessel previously removed from service.
Specialty Vessel Previously Removed from Service
Specialty Vessel Previously Removed From Service [Member]
Vessel under construction and other equipment.
Vessel under Construction and Other Equipment
Vessel Under Construction And Other Equipment [Member]
Equipment
Equipment [Member]
Debt Instrument
Debt Instrument [Axis]
Debt Instrument, Name
Debt Instrument Name [Domain]
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]
Windcat Workboats.
Windcat Workboats
Windcat Workboats [Member]
Property Plant And Equipment [Line Items]
Property Plant And Equipment [Line Items]
Payments to acquire property, plant, and equipment, including fair value hedges
Payments To Acquire Property Plant And Equipment Including Fair Value Hedges
Number of equipment acquired
Number Of Equipment Acquired
Number of equipment sold
Number Of Equipment Sold
Setoff of debt under credit facility
Setoff Of Debt Under Credit Facility
Property plant equipment consideration transferred
Property Plant Equipment Consideration Transferred
Gain (loss) on disposition of property, plant and equipment
Gain Loss On Sale Of Property Plant Equipment
Proceeds from deposits
Proceeds From Deposits
Proceeds from sale of property plant and equipment gross.
Payments for transactions fees and other costs.
Cash sold on property plant and equipment disposal.
Total Proceeds Received
Proceeds From Sale Of Property Plant And Equipment Gross
Transactions Fees and other Costs
Payments For Transactions Fees And Other Costs
Cash Sold
Cash Sold On Property Plant And Equipment Disposal
Total Net Proceeds
Less: Net Equity in Windcat Workboats, net of cash sold
Property Plant And Equipment Disposals
Less: January Income on Discontinued Operations
Property Plant And Equipment Transfers And Changes
Gain on Sale of Windcat Workboats
Schedule Of Investments [Table]
Schedule Of Investments [Table]
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]
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]
MEXMAR offshore [Member].
MEXMAR Offshore
M E X M A R Offshore [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]
Schedule Of Investments [Line Items]
Schedule Of Investments [Line Items]
Ownership percentage
Investments at equity
Equity Method Investments
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]
Mexmar offshore international.
MEXMAR Offshore
Mexmar Offshore International [Member]
Asset Class
Fair Value By Asset Class [Axis]
Asset Class
Fair Value Assets Measured On Recurring Basis Unobservable Input Reconciliation By Asset Class [Domain]
Equity Method Investment
Equity Method Investments [Member]
Investment, distribution exceeded
Investment Company Dividend Distribution
Debt Instrument [Table]
Debt Instrument [Table]
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]
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]
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]
Tarahumara shipyard financing.
Tarahumara Shipyard Financing
Tarahumara 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]
Recourse Status
Recourse Status [Axis]
Recourse Status
Recourse Status [Domain]
Recourse Long-Term Debt
Recourse [Member]
Non-Recourse Long-Term Debt
Nonrecourse [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
Number of liftboats released from mortgages and security arrangements.
Debt instrument maturity year.
Reimbursement amount.
Collaborative Arrangement and Arrangement Other than Collaborative
Type Of Arrangement [Axis]
Collaborative Arrangement and Arrangement Other than Collaborative
Arrangements And Nonarrangement Transactions [Member]
Term loan to acquire one vessel.
Term Loan to Acquire One Vessel
Term Loan To Acquire One Vessel [Member]
Conditional payoff agreement.
Conditional Payoff Agreement
Conditional Payoff Agreement [Member]
Term and revolving loan facility.
Term and Revolving Loan Facility
Term And Revolving Loan Facility [Member]
Debt Instrument, Redemption, Period
Debt Instrument Redemption Period [Axis]
Debt Instrument, Redemption, Period
Debt Instrument Redemption Period [Domain]
Paid at Signing of Conditional Payoff Agreement
Debt Instrument Redemption Period One [Member]
Paid Using Hull and Machinery Insurance Proceeds
Debt Instrument Redemption Period Two [Member]
Reimbursed from Hull and Machinery Insurance Proceeds
Debt Instrument Redemption Period Three [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 instrument, face amount
Debt Instrument Face Amount
Debt instrument, interest rate, effective percentage
Debt Instrument Interest Rate Effective Percentage
Debt instrument, maturity year
Debt Instrument Maturity Year
Principal outstanding under Credit Facility
Line Of Credit
Payment to lenders
Number of liftboats released from mortgages and security arrangements
Number Of Liftboats Released From Mortgages And Security Arrangements
Gain on restructuring of debt
Gains Losses On Restructuring Of Debt
Reimbursement amount
Reimbursement Amount
Hull and machinery insurance proceeds.
Current Liabilities
Debt Current
Transaction Fees
Debt Instrument Fee Amount
Cash Paid
Hull and Machinery Insurance Proceeds
Hull And Machinery Insurance Proceeds
Gain on Troubled Debt Restructuring
Troubled Debt Restructuring Debtor Current Period Gain Loss On Restructuring Net Of Tax
Troubled debt restructuring debtor current period increase decrease of basic earnings per share.
Troubled debt restructuring debtor current period increase decrease of diluted earnings per share.
Gain on troubled debt restructuring, increase of basic earnings per share
Troubled Debt Restructuring Debtor Current Period Increase Decrease Of Basic Earnings Per Share
Gain on troubled debt restructuring, increase of diluted earnings per share
Troubled Debt Restructuring Debtor Current Period Increase Decrease Of Diluted Earnings Per Share
Letters of credit outstanding, amount
Letters Of Credit Outstanding Amount
Number of operating leases on equipment.
Lessee Lease Description [Table]
Lessee Lease Description [Table]
Anchor Handling Towing Supply Vessels
Information pertaining to vessels.
Vessels
Vessels [Member]
Member stands for other equipment.
Other Equipment
Other Equipment [Member]
Lessee Lease Description [Line Items]
Lessee Lease Description [Line Items]
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]
Remainder of 2021
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year
2022
Lessee Operating Lease Liability Payments Due Next Twelve Months
2023
Lessee Operating Lease Liability Payments Due Year Two
2024
Lessee Operating Lease Liability Payments Due Year Three
2025
Lessee Operating Lease Liability Payments Due Year Four
Years subsequent to 2025
Lessee Operating Lease Liability Payment Due After Year Four
Operating lease payments due
Lessee Operating Lease Liability Payments Due
Interest component
Lessee Operating Lease Liability Undiscounted Excess Amount
Total operating leases
Operating Lease Liability
Long-term lease liabilities
Finance Leases
Finance Lease Liabilities Payments Due [Abstract]
Remainder of 2021
Finance Lease Liability Payments Remainder Of Fiscal Year
2022
Finance Lease Liability Payments Due Next Twelve Months
2023
Finance Lease Liability Payments Due Year Two
2024
Finance Lease Liability Payments Due Year Three
2025
Finance Lease Liability Payments Due Year Four
Years subsequent to 2025
Finance Lease Liability Payments Due After Year Four
Total finance leases
Finance Lease Liability Payments Due
Interest component
Finance Lease Liability Undiscounted Excess Amount
Finance Leases
Finance Lease Liability
Long-term lease liabilities
Finance lease costs.
Operating lease cost
Operating Lease Cost
Finance lease cost:
Finance Lease Costs [Abstract]
Amortization of finance lease assets
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 outflows from operating leases
Operating Lease Payments
Financing cash outflows from finance leases
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 rate - finance leases
Finance Lease Weighted Average Discount Rate Percent
Effective income tax rate reconciliation foreign withholding tax.
Effective income tax rate reconciliation foreign income tax not creditable percent.
Effective Income Tax Rate Reconciliation, Percent [Abstract]
Effective Income Tax Rate Continuing Operations Tax Rate Reconciliation [Abstract]
Statutory rate
Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate
Foreign withholding tax
Effective Income Tax Rate Reconciliation Foreign Withholding Tax
Foreign earnings not subject to U.S. Income Tax
Effective Income Tax Rate Reconciliation Foreign Income Tax Not Creditable Percent
Other
Effective Income Tax Rate Reconciliation Other Adjustments
Effective income tax rate reconciliation, percent, total
Expected cash tax refunds receivable.
Interest received on cash refunds.
Proceeds of cash tax refunds.
Income Taxes.
Income taxes.
Income Taxes [Table]
Income Taxes [Table]
Tax refund and indemnification agreement.
Tax Refund Agreement
Tax Refund And Indemnification Agreement [Member]
Income Taxes [Line Items]
Income Taxes [Line Items]
Expected to cash tax refunds receivable
Expected Cash Tax Refunds Receivable
Interest received on cash refunds
Interest Received On Cash Refunds
Proceeds of cash tax refunds
Proceeds Of Cash Tax Refunds
Derivative [Table]
Derivative [Table]
Hedging Designation
Hedging Designation [Axis]
Hedging Designation
Hedging Designation [Domain]
Designated as Hedging Instrument
Designated As Hedging Instrument [Member]
Not Designated as Hedging Instrument
Nondesignated [Member]
Derivative Instrument
Derivative Instrument Risk [Axis]
Derivative Contract
Derivative Contract Type [Domain]
Interest Rate Swap
Interest Rate Swap [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 instruments (included in other receivables)
Derivative Assets
Derivative Liability
Derivative Liabilities
Conversion option liability on Convertible Senior Notes
Embedded Derivative Fair Value Of Embedded Derivative Liability
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]
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, fixed interest rate
Derivative Fixed Interest Rate
Derivative, notional amount
Derivatives Notional Amount
Derivative, number of instruments held, total
Derivative Number Of Instruments Held
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
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
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
Long-term debt, including current portion
Long Term Debt Fair Value
Number of property and equipment with fair value.
Information pertaining to liftboats.
Liftboats
Liftboats [Member]
Impairment charges
Asset Impairment Charges
Number of property and equipment with fair value
Number Of Property And Equipment With Fair Value
Property and equipment, fair value
Property Plant And Equipment Fair Value Disclosure
Commitments and contingencies.
Commitments and contingencies.
Commitments And Contingencies [Table]
Commitments And Contingencies [Table]
Platform supply vessel.
Platform Supply Vessels
Platform Supply Vessel [Member]
Information pertaining to FSV offshore support vessels.
FSV Offshore Support Vessels
F S V Offshore Support Vessels [Member]
Litigation Case
Litigation Case [Axis]
Litigation Case
Litigation Case Type [Domain]
Deficiency notice.
Deficiency Notice
Deficiency Notice [Member]
Counterparty Name
Counterparty Name [Axis]
Counterparty Name
Repurchase Agreement Counterparty Name [Domain]
Represents wholly owned subsidiary Seabulk Overseas.
Seabulk Overseas
Seabulk Overseas [Member]
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]
Commitments And Contingencies [Line Items]
Commitments And Contingencies [Line Items]
Remaining capital commitment
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 four years
Unrecorded Unconditional Purchase Obligation Balance On Fourth Anniversary
Unrecorded unconditional purchase obligation, due in remainder of fiscal year
Unrecorded Unconditional Purchase Obligation Due In Remainder Of Fiscal Year
Unrecorded unconditional purchase obligation, due within two years
Unrecorded Unconditional Purchase Obligation Balance On First Anniversary
Cost allocation percentage.
Cost allocation percentage
Cost Allocation Percentage
Potential range of levies
Loss Contingency Estimate Of Possible Loss
Amount guaranteed under arrangement
Guarantee Obligations Maximum Exposure
Tax refunds remained in account
Proceeds From Income Tax Refunds
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]
Schedule Of Share Based Compensation Arrangements By Share Based Payment Award [Table]
Award Type
Award Type [Axis]
Award Type
Share Based Compensation Arrangements By Share Based Payment Award Award Type And Plan Name [Domain]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Outstanding as of the beginning of year (in shares)
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Nonvested Number
Granted (in shares)
Share Based Compensation Arrangement By Share Based Payment Award Equity Instruments Other Than Options Grants In Period
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)
Stock Issued During Period Shares Stock Options Exercised
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
Performance Shares [Member]
Number of shares outstanding
Treasury stock, shares acquired
Treasury stock, value acquired cost method
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.
Schedule Of Segment Reporting Information By Segment [Table]
Schedule Of Segment Reporting Information By Segment [Table]
Africa and Europe, Continuing Operations
Statement Geographical [Axis]
Geographical
Segment Geographical [Domain]
UNITED STATES
U S
Africa and Europe.
Africa and Europe, Continuing Operations
Africa And Europe [Member]
Information pertaining to Middle East and Asia.
Middle East and Asia
Middle East And Asia [Member]
Latin America
Latin America [Member]
Product and Service
Product Or Service [Axis]
Product and Service
Products And Services [Domain]
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]
Segment Reporting Information [Line Items]
Segment Reporting Information [Line Items]
Direct Costs and Expenses
Cost Of Goods And Services Sold And Adjustment
Direct Vessel (Loss) Profit
Gross Profit
Administrative and general
General And Administrative Expense Including Short Term Lease Expense
Other Costs and Expenses
Other Cost And Expense Operating
Operating Loss, for Continuing Operations
The amount of assets, excluding corporate assets.
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, Discontinued Operations
Assets Of Disposal Group Including Discontinued Operation
Equity in earnings (losses) of owned companies.
Segment information.
Segment information.
Segment Information [Table]
Segment Information [Table]
Segment Information [Line Items]
Segment Information [Line Items]
Equity method investments
Equity in Gains (Losses) Earnings of 50% or Less Owned Companies
Equity In Earnings Losses Of Owned Companies
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]
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]
Represents information about Windcat Workboats Ltd.
Windcat Workboats Holdings Ltd
Windcat Workboats Ltd [Member]
Disposal Group Classification
Disposal Group Classification [Axis]
Disposal Group Classification
Disposal Group Classification [Domain]
Discontinued Operations, Held-for-sale
Discontinued Operations Heldforsale [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]
Net income from operations
Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax
Disposal group including discontinued operation lease expense.
Disposal group including discontinued operation expenses.
Disposal group including discontinued operation other nonoperating income expense.
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 income loss before equity method investments after tax.
Disposal group including discontinued operation income (loss) from equity method investments.
Disposal group discontinued operation operating revenue.
Disposal group discontinued operation costs and expenses.
Disposal group including discontinued operation other nonoperating income expense.
Other revenue.
Other Revenue
Other Revenue [Member]
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
Total expenses
Disposal Group Including Discontinued Operation Expenses
Operating Income
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
Disposal Group Including Discontinued Operation Foreign Currency Translation Gains Losses
Other Income (Expense)
Disposal Group Including Discontinued Operation Other Nonoperating Income Expense
Operating 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 Expense (Benefit)
Disposal Group Including Discontinued Operation Income Tax Expense Benefit
Operating Income 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 (Losses) of 50% or Less Owned Companies, Net of Tax
Disposal Group Including Discontinued Operation Income Loss From Equity Method Investments
Net Income from Discontinued Operations