Entity Central Index Key
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.
Document and entity information.
Document And Entity Information [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
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.
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).
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 doubtful accounts of $455 and $860 in 2019 and 2018, respectively
Accounts Receivable Net Current
Other
Other Receivables Net Current
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
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
Assets Held for Sale
Disposal Group Including Discontinued Operation 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 long-term debt
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 income taxes
Accrued Income Taxes Current
Deferred revenue
Contract With Customer Liability Current
Accrued capital, repair and maintenance expenditures
Accrued Capital Repair And Maintenance Expenditures 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 Debt
Long Term Debt Noncurrent
Conversion Option Liability on Convertible Senior Notes
Derivative Liabilities Noncurrent
Deferred Income Taxes
Deferred Tax Liabilities Noncurrent
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; 21,868,718 and 20,443,215 shares issued in 2019 and 2018, respectively
Common Stock Value
Additional paid-in capital
Additional Paid In Capital
Retained earnings
Retained Earnings Accumulated Deficit
Shares held in treasury of 42,504 and 4,007, 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 doubtful accounts
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.
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
Gain (loss) 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) losses, net
Gain Loss On Derivative Instruments Net Pretax
Foreign currency gains, 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 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 Expense (Benefit)
Income Tax Expense Benefit
Loss 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 Losses of 50% or Less Owned Companies
Income Loss From Equity Method Investments
Loss from Continuing Operations
Income Loss From Continuing Operations
(Loss) Income on Discontinued Operations, Net of Tax
Discontinued Operation Gain Loss On Disposal Of Discontinued Operation Net Of Tax
Net Loss
Profit Loss
Net Income (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 Income (Loss) Per Common Share and Warrants of SEACOR Marine Holdings Inc.
Earnings Per Share Basic And Diluted [Abstract]
Continuing operations (Basic)
Income Loss From Continuing Operations Per Basic Share
Discontinued operations (Basic)
Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Basic Share
Basic Income (Loss) Per Common Share
Earnings Per Share Basic
Continuing operations (Diluted)
Income Loss From Continuing Operations Per Diluted Share
Discontinued operations (Diluted)
Discontinued Operation Income Loss From Discontinued Operation Net Of Tax Per Diluted Share
Diluted Income (Loss) Per Common Share
Earnings Per Share 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 [Member]
Interest Expense [Member]
Primary financial statement caption encompassing equity method investments.
Equity Method Investments [Member]
Equity Method Investments1 [Member]
Statement [Line Items]
Statement [Line Items]
Net Loss
Other Comprehensive Loss:
Other Comprehensive Income Loss Before Tax Period Increase Decrease [Abstract]
Foreign currency translation losses
Other Comprehensive Income Foreign Currency Transaction And Translation Gain Loss Before Reclassification And Tax
Derivative (losses) gains 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
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 Income (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 earnings
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.
Adjustments To Additional Paid In Capital Cancellation Of Employee Share
Dissolution of entity.
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]
Balance
Balance (in shares)
Impact of adoption of new accounting standard
Cumulative Effect Of New Accounting Principle In Period Of Adoption
Balance
Stockholders Equity Including Portion Attributable To Noncontrolling Interest Adjusted Balance1
Issuance of Common Stock
Stock Issued During Period Value New Issues
Issuance of Common Stock (in shares)
Stock Issued During Period Shares New Issues
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
Issuance of Warrants
Adjustments To Additional Paid In Capital Warrant Issued
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
Cancellation of employee share awards
Adjustments To Additional Paid In Capital Cancellation Of Employee Share
Cancellation of employee share awards (in shares)
Stock Redeemed Or Called During Period Shares
Acquisition of consolidated joint venture
Stock Granted During Period Value Sharebased Compensation
Issuance of noncontrolling interests
Noncontrolling Interest Increase From Subsidiary Equity Issuance
Dissolution of an entity
Dissolution Of Entity
Other comprehensive 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.
Amount of cash inflow from exercise of stock options and warrants granted.
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.
Statement Of Cash Flows [Abstract]
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 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
Restricted stock amortization
Restricted Stock Expense
Restricted stock vesting
Restricted Stock Vesting
Director share awards
Director Stock Awards
Debt discount amortization
Amortization Of Debt Discount Premium
Amortization of deferred gains against charter expense
Sale Leaseback Transaction Current Period Gain Recognized
Bad debt (recovery) expense
Provision For Doubtful Accounts
Loss from equipment sales, retirements or impairments
Gain from other sales
Gain Loss On Sale Of Other Assets
Derivative losses
Cash settlement on derivative transactions, net
Payments For Proceeds From Derivative Instruments Operating Activities
Currency losses
Foreign Currency Transaction Loss Before Tax
Deferred income taxes
Deferred Income Tax Expense Benefit
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 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
Net change in construction reserve fund
Payments For Proceeds From Other Investing Activities
Investments in and advances to 50% or less owned companies
Payments To Acquire Equity Method Investments
Sale of subsidiary joint venture
Proceeds From Divestiture Of Interest In Joint Venture
Capital distributions from equity investees
Proceeds From Equity Method Investment Dividends Or Distributions Return Of Capital
Payments received on third party notes receivable, net
Proceeds From Collection Of Notes Receivable
Principal payments on notes due from equity investees
Repayment Of Notes Receivable From Related Parties
Net cash used in 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
Proceeds from issuance of long-term debt, net of issue costs
Proceeds From Debt Net Of Issuance Costs
Purchase of subsidiary shares from noncontrolling interests
Proceeds From Payments To Minority Shareholders
Proceeds from exercise of stock options and Warrants
Proceeds From Stock Options And Warrants Exercised
Issuance of stock
Proceeds From Issuance Of Common Stock
Issuance of Warrants
Proceeds From Issuance Of Warrants
Net cash (used in) provided by financing activities
Net Cash Provided By Used In Financing Activities
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 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
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 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, 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
Basis of presentation and accounting policies.
Basis Of Presentation And Accounting Policies [Abstract]
Basis of Presentation and Accounting Policies
Basis Of Accounting
Restructuring And Related Activities [Abstract]
Transformation, Facility Restructuring and Severance Charges
Restructuring And Related Activities Disclosure [Text Block]
Equipment Acquisitions and Dispositions
Property Plant And Equipment Disclosure [Text Block]
Notes to Financial Statements
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]
The entire disclosure for warrants and rights.
Notes to Financial Statements
Warrants
Warrants And Rights [Text Block]
Notes to Financial Statements
Stockholders' Equity
Stockholders Equity Note Disclosure [Text Block]
Disclosure Text Block [Abstract]
Noncontrolling Interests in Subsidiaries
Minority Interest Disclosure [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]
Assets Held for Sale
Disposal Groups Including Discontinued Operations Disclosure [Text Block]
Consolidation
Consolidation Policy [Text Block]
Disclosure of accounting policy pertaining to recently adopted accounting standards.
Recently Adopted Accounting Standards
Recently Adopted Accounting Standards Policy [Text Block]
Assets Held for Sale
Discontinued Operations Policy [Text Block]
Revenue Recognition
Revenue Recognition Policy [Text Block]
Property and Equipment
Property Plant And Equipment Policy [Text Block]
Impairment of Long-Lived Assets and 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]
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
Deferred Gains Policy [Text Block]
Accumulated Other Comprehensive Income (Loss)
Comprehensive Income Policy Policy [Text Block]
Leases
Lessee Leases Policy [Text Block]
Loss Per Share
Earnings Per Share Policy [Text Block]
New Accounting Pronouncements
New Accounting Pronouncements Policy Policy [Text Block]
Schedule of Deferred Revenues
Deferred Revenue By Arrangement Disclosure [Text Block]
Schedule of Property and Equipment Useful Life
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
Schedule Of Comprehensive Income Loss Table [Text Block]
Schedule of Components of Restructuring Charges By Segment
Schedule Of Restructuring And Related Costs [Text Block]
Schedule of Severance and Other Restructuring Charges
Schedule Of Restructuring Reserve By Type Of Cost [Text Block]
Schedule of cumulative restructuring and reorganization cost incurred to date, estimated remaining and to be incurred.
Schedule of Cumulative Restructuring and Reorganization Cost Incurred to Date, Estimated Remaining and to be Incurred
Schedule Of Cumulative Restructuring And Reorganization Cost Incurred To Date Estimated Remaining And To Be Incurred Table [Text Block]
Schedule of Long-term Debt Obligations
Schedule Of Debt Instruments [Text Block]
Summary of Future Minimum Payments For Operating Leases
Lessee Operating Lease Liability Maturity Table [Text Block]
Summary of Components of Leases Expense
Lease Cost Table [Text Block]
Schedule of other information related to operating leases.
Summary of Other Information Related to Operating Leases
Schedule Of Other Information Related To Operating 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 (Losses) Gains 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.
Table [Text Block]
Schedule of Noncontrolling Interests in the Company's Consolidated Subsidiaries
Schedule Of Noncontrolling Interest Table [Text Block]
Summary of Transactions in Connection with 2017 Equity Incentive Plan
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]
Adjustments for New Accounting Pronouncements
Adjustments For New Accounting Pronouncements [Axis]
Type of Adoption
Type Of Adoption [Member]
Accounting Standards Update 2016-02 [Member]
Accounting Standards Update201602 [Member]
Adjustments for Change in Accounting Principle
Adjustments For Change In Accounting Principle [Axis]
Adjustments for Change in Accounting Principle
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 [Member]
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 [Member]
Change In Accounting Principle For Unamortized Deferred Gains [Member]
Type of Arrangement and Non-arrangement Transactions
Type Of Arrangement [Axis]
Arrangements and Non-arrangement Transactions
Arrangements And Nonarrangement Transactions [Member]
Sale and purchase agreement.
SAP
Sale And Purchase Agreement [Member]
Subsequent Event Type
Subsequent Event Type [Axis]
Subsequent Event Type
Subsequent Event Type [Domain]
Subsequent Event
Subsequent Event [Member]
Legal Entity
Legal Entity [Axis]
Entity
Entity [Domain]
SEACOR capital (UK) limited.
SEACAP
S E A C O R Capital U K Limited [Member]
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]
Boston Putford Offshore Safety Limited.
BPOS
Boston Putford Offshore Safety Limited [Member]
Counterparty Name
Counterparty Name [Axis]
Counterparty Name
Repurchase Agreement Counterparty Name [Domain]
North star holdco limited.
North Star
North Star Holdco 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]
Geographic Distribution
Geographic Distribution [Axis]
Geographic Distribution
Geographic Distribution [Domain]
Geographic Distribution, Foreign
Geographic Distribution Foreign [Member]
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]
Member stands for deferred reimbursement for upgrades of a vessel and deferred reservaton fees.
Deferred Reimbursement And Deferred Reservation Fees
Deferred Reimbursement And Deferred Reservation Fees [Member]
Customer
Major Customers [Axis]
Customer
Name Of Major Customer [Domain]
Two customers member.
Two Customers
Two Customers [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]
Basis Of Presentation And Accounting Policies [Line Items]
Basis Of Presentation And Accounting Policies [Line Items]
Operating Lease, Right-of-Use Asset
Operating Lease, Liability
Operating Lease Liability
Cumulative Effect on Retained Earnings, Net of Tax
Cumulative Effect On Retained Earnings Net Of Tax1
Impact of adoption of new accounting standard
New Accounting Pronouncement Or Change In Accounting Principle Effect Of Adoption Quantification
Cumulative Effect on Retained Earnings, Tax
Disposal group including discontinued operation maximum additional consideration.
Equity interest
Discontinued Operation Equity Method Investment Retained After Disposal Ownership Interest After Disposal
Aggregate purchase price
Disposal Group Including Discontinued Operation Consideration
Additional consideration
Disposal Group Including Discontinued Operation Maximum Additional Consideration
Increase in contract with customer liability during the period.
Balance at beginning of period
Contract With Customer Liability
Revenues deferred during the period
Contract With Customer Liability Additions
Revenues recognized during the period
Contract With Customer Liability Revenue Recognized
Balance at end of period
Contract with customer, liability
Schedule Of Property Plant And Equipment [Table]
Schedule Of Property Plant And Equipment [Table]
Property, Plant and Equipment, Type
Property Plant And Equipment By Type [Axis]
Property, Plant and Equipment, Type
Property Plant And Equipment Type [Domain]
Information pertaining to crew transfer vessels.
Crew Transfer Vessels
Crew Transfer Vessels [Member]
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
Capitalized interest costs, including allowance for funds used during construction, total
Interest Costs Incurred Capitalized
Impairment of long-lived assets held-for-use
Impairment Of Long Lived Assets Held For Use
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
The amount of other adjustment to deferred gain on sale of property.
Balance at beginning of period
Deferred Gain On Sale Of Property
Amortization of deferred gains included in operating expenses as a reduction to rental expense
Amortization Of Deferred Charges
Impact of adoption of new accounting standard
Other adjustments
Deferred Gain On Sale Of Property Other Adjustments
Balance at end of period
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
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
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
Restructuring and transformation charges
Restructuring Charges
Severance charges
Severance Costs1
Other restructuring charges
Other Restructuring Costs
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 [Member]
Middle East And Asia [Member]
Latin America
Latin America [Member]
Europe
Europe [Member]
Severance Charges
Other Charges
Total Charges
Restructuring liability.
Restructuring Type
Restructuring Cost And Reserve [Axis]
Type of Restructuring
Type Of Restructuring [Domain]
Severance Liability
Employee Severance [Member]
Other Liability
Other Restructuring [Member]
Restructuring liability
Restructuring Liability
Cumulative restructuring costs incurred to date in operating charges
Restructuring And Related Cost Cost Incurred To Date1
Estimated additional restructuring costs to be incurred
Restructuring And Related Cost Expected Cost Remaining1
Total restructuring and reorganization costs incurred and to be incurred
Restructuring And Related Cost Expected Cost1
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.
Fast support vessels member.
Fast Support Vessels
Fast Support Vessels [Member]
Member stands for platform supply vessels ("PSVs").
Platform Supply Vessels
Platform Supply Vessels [Member]
Vessel under construction.
Vessel Under Construction
Vessel Under Construction [Member]
Specialty vessel member.
Specialty Vessel
Specialty Vessel [Member]
Information pertaining to anchor handling towing supply.
Anchor Handling Towing Supply
Anchor Handling Towing Supply [Member]
Information pertaining to supply vessels.
Supply Vessels
Supply Vessels [Member]
Information pertaining to liftboats.
Liftboats
Liftboats [Member]
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
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.
Amount of cash inflow for receipts of deposits.
Represents the number of equipment sold.
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
Number of equipment sold
Number Of Equipment Sold
Proceeds from deposits
Proceeds From Deposits
Gain (loss) on disposition of property, plant and equipment
Gain Loss On Sale Of Property Plant Equipment
The number of vessels deliverd to the company.
Number of vessels for which company gets title.
Schedule Of Investments [Abstract]
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 SeaCosco Offshore LLC.
Sea Cosco Offshore L L C
Sea Cosco Offshore L L C [Member]
SeaCosco Offshore LLC
Platform Supply Vessels
Ownership
Ownership [Axis]
Ownership
Ownership [Domain]
SEACOR offshore asia.
SEACOR Offshore Asia
S E A C O R Offshore Asia [Member]
China shipping fan tai limited and china shipping industry (Hong Kong) co limited.
CSFT and CSIHK
China Shipping Fan Tai Limited And China Shipping Industry Hong Kong Co Limited [Member]
Memorandum of understanding.
MOU
Memorandum Of Understanding [Member]
Mexmar offshore international.
Mexmar Offshore International
Mexmar Offshore International [Member]
Consolidated Entities
Consolidated Entities [Axis]
Consolidated Entities
Consolidated Entities [Domain]
FRS windcat offshore logistics GmbH.
FRS Windcat Offshore Logistics GmbH
F R S Windcat Offshore Logistics Gmb H [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]
Equity method investment, ownership percentage
Equity Method Investment Ownership Percentage
Contributed capital
Partners Capital Account Contributions
Number of vessels delivered to the company
Number Of Vessels Delivered To Company
Number of vessels for which the company gets title
Number Of Vessels For Which Company Gets Title
Number of vessels acquired.
Agreement standstill date.
Contractual interest rate for amounts loaned to others under the loan agreement.
Shareholder loans in respect of working capital.
Interest income recognized on shareholder loans in respect of working capital.
Agreement standstill date
Agreement Standstill Date
Loans receivable, interest rate
Loans Receivable Interest Rate Stated Percentage
Shareholder loans in respect of working capital
Shareholder Loans In Respect Of Working Capital
Interest income recognized on shareholder loans in respect of working capital
Interest Income Recognized On Shareholder Loans In Respect Of Working Capital
Number of vessels acquired
Number Of Vessels Acquired
Number of vessels owned.
Equity method investment unrealized gain loss.
Payments to acquire interest in unconsolidated joint venture
Number of vessels owned
Number Of Vessels Owned
Equity investments unrealized gain loss
Equity Method Investment Unrealized Gain Loss
Amount of consideration received or receivable for the sale of vessels.
Sale of vessel, consideration
Sale Of Vessels Consideration
Represents the entity's allocable share of uncalled capital.
Allocable share of uncalled capital
Allocable Share Of Uncalled Capital
Debt Instrument [Table]
Debt Instrument [Table]
Debt Instrument
Debt Instrument [Axis]
Debt Instrument, Name
Debt Instrument Name [Domain]
Member stands for SEACOR Marine Foreign Holdings Syndicated Credit Facility.
SEACOR Marine Foreign Holdings Syndicated Credit Facility
S E A C O R Marine Foreign Holdings Syndicated Credit Facility [Member]
Member represents convertible senior notes.
Convertible Senior Notes
Convertible Senior Notes [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]
Mebers stands for Windcat workboats facilities.
Windcat Workboats Facilities
Windcat Workboats Facilities [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 88/888 term loan.
SEACOR 88/888 Term Loan
S E A C O R88888 Term Loan [Member]
SEACOR Alps.
SEACOR Alps
S E A C O R Alps [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]
Debt Instrument [Line Items]
Debt Instrument [Line Items]
Long-term Debt, Gross
Debt Instrument Carrying Amount
Portion due within one year
Debt discount
Debt Instrument Unamortized Discount
Issue costs
Deferred Finance Costs Noncurrent Net
Long-term debt
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]
Guarantor Obligations, Nature
Guarantee Obligations By Nature [Axis]
Guarantor Obligations, Nature
Guarantee Obligations Nature [Domain]
Related to securing long-term debt obligation.
Long-term Debt Obligation
Longterm Debt Obligation Gurantee [Member]
Related to securing lease obligation.
Lease Obligation
Lease Obligation Gurantee [Member]
Information pertaining to labor and perforamance guarntees.
Labor And Performance Guarantees
Labor And Performance Guarantees [Member]
Line of credit facility, maximum borrowing capacity
Line Of Credit Facility Maximum Borrowing Capacity
Debt instrument, percentage of financing on total purchase price.
Debt instrument, maturity period.
Debt instrument, percentage of financing on total purchase price
Debt Instrument Percentage Of Financing On Total Purchase Price
Debt instrument, interest rate
Debt Instrument Interest Rate Stated Percentage
Debt instrument, maturity period
Debt Instrument Maturity Period
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
Supply vessels certain facilities and other equipments.
Supply Vessels, Certain Facilities And Other Equipments
Supply Vessels Certain Facilities And Other Equipments [Member]
Information pertaining to vessels.
Vessels
Vessels [Member]
Member stands for other equipment.
Other Equipment
Other Equipment [Member]
Range
Range [Axis]
Range
Range [Member]
Minimum
Minimum [Member]
Maximum
Maximum [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
Remainder of 2019
Lessee Operating Lease Liability Payments Remainder Of Fiscal Year
2020
Lessee Operating Lease Liability Payments Due Year Two
2021
Lessee Operating Lease Liability Payments Due Year Three
2022
Lessee Operating Lease Liability Payments Due Year Four
2023
Lessee Operating Lease Liability Payments Due Year Five
Years subsequent to 2023
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
Operating lease expense
Operating Lease Expense
Short-term lease expense (lease duration of twelve months or less at lease commencement)
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
Weighted average remaining lease term, in years
Operating Lease Weighted Average Remaining Lease Term1
Weighted average discount rate
Operating Lease Weighted Average Discount Rate Percent
Effective income tax rate reconciliation foreign income tax not creditable percent.
Effective income tax rate reconciliation return to provision 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 taxes not creditable against U.S. income tax
Effective Income Tax Rate Reconciliation Foreign Income Tax Not Creditable Percent
Foreign earnings not subject to U.S. income tax
Effective Income Tax Rate Reconciliation Tax Exempt Income
Return to provision
Effective Income Tax Rate Reconciliation Return To Provision Percent
Noncontrolling interests
Effective Income Tax Rate Reconciliation Minority Interest Income Expense
State taxes
Effective Income Tax Rate Reconciliation State And Local Income Taxes
Other
Effective Income Tax Rate Reconciliation Other Adjustments
Effective income tax rate reconciliation, percent, total
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]
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
Derivatives notional amount.
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]
S M F H.
SMFH
S M F H [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]
Information pertaining to MexMar.
MexMar
Mex Mar [Member]
Information pertaining to OSV Partners.
OSV Partners
O S V Partners [Member]
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
Embedded Derivative Financial Instruments
Embedded Derivative Financial Instruments [Member]
Gains (losses) on derivative instruments
Derivative Instruments Not Designated As Hedging Instruments Gain Loss Net
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]
Fair Value, 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]
Construction reserve funds
Construction Reserve Funds Fair Value Disclosure
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
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
impairment charges
Asset Impairment Charges
The number of warrants or rights exercised during period.
Exercise price per share of warrants or rights exercised during period.
Common stock shares withheld.
Warrants And Rights Note Disclosure [Abstract]
Class Of Warrant Or Right [Table]
Class Of Warrant Or Right [Table]
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 Warrant or Right
Class Of Warrant Or Right [Axis]
Class of Warrant or Right
Class Of Warrant Or Right [Domain]
Represents the warrants issued in a private placement.
Warrants Issued in Private Placement
Warrants Issued In Private Placement [Member]
Related to the PIPE Warrants.
PIPE Warrants
P I P E Warrants [Member]
Represents information about Exchange Warrants.
Exchange Warrants
Exchange Warrants [Member]
Information pertaining to Carlyle Group.
Carlyle Group
Carlyle Group [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]
Class Of Warrant Or Right [Line Items]
Class Of Warrant Or Right [Line Items]
Stock issued during period, value, new issues
Class of warrant or right, outstanding
Class Of Warrant Or Right Outstanding
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, exercise price of warrants or rights
Warrants and rights outstanding, term
Warrants And Rights Outstanding Term
Debt conversion, original debt, amount
Debt Conversion Original Debt Amount1
Class of warrant or right, exercised during period
Class Of Warrant Or Right Exercised During Period
Class of warrant or right, exercised during period, exercise price
Class Of Warrant Or Right Exercised During Period Exercise Price
Common stock withheld
Common Stock Shares Withheld
Note To Financial Statement Details Textual
Note To Financial Statement Details Textual
Business Acquisition
Business Acquisition [Axis]
Business Acquisition, Acquiree
Business Acquisition Acquiree [Domain]
Represents wholly owned subsidiary Seabulk Overseas.
Seabulk Overseas
Seabulk Overseas [Member]
Cumulative Effect of New Accounting Principle in Period of Adoption
Stock Issued During Period, Shares, New Issues
Common stock value
Business acquisition, percentage of voting interests acquired
Business Acquisition Percentage Of Voting Interests Acquired
Business combination, consideration transferred, total
Business Combination Consideration Transferred1
Business acquisition, exchange for consideration
Business Acquisition Equity Interests Issued Or Issuable Number Of Shares Issued
Noncontrolling Interest [Abstract]
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, percent
Minority Interest Ownership Percentage By Noncontrolling Owners
Noncontrolling interest
Falcon global holding member.
Falcon Global Holdings
Falcon Global Holding [Member]
Windcat Workboats.
Windcat Workboats
Windcat Workboats [Member]
Net income (loss), including portion attributable to noncontrolling interest, total
Net income (loss) attributable to noncontrolling interest, total
Noncontrolling interest, ownership percentage by parent
Commitments and contingencies.
Commitments and contingencies.
Commitments And Contingencies [Table]
Commitments And Contingencies [Table]
Platform supply vessel.
Platform Supply Vessels
Platform Supply Vessel [Member]
Long-term Debt, Type
Longterm Debt Type [Axis]
Long-term Debt, Type
Longterm Debt Type [Domain]
Line of Credit
Line Of Credit [Member]
Performance Guarantee
Performance Guarantee [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]
Represents the credit agreement entered by FGUSA who is a wholly-owned subsidiary of FGH.
FGUSA Credit Facility [Member]
F G U S A Credit Facility [Member]
Information pertaining to the term loan.
Term Loan [Member]
Term Loan [Member]
Credit Facility
Credit Facility [Axis]
Credit Facility
Credit Facility [Domain]
Revolving Credit Facility [Member]
Revolving Credit Facility [Member]
Income Tax Authority, Name
Income Tax Authority Name [Axis]
Income Tax Authority, Name
Income Tax Authority Name [Domain]
Program of social integration.
PIS
Program Of Social Integration [Member]
Contribution for the financing of social security.
COFINS
Contribution For Financing Of Social Security [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 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 Second Anniversary
Unrecorded unconditional purchase obligation, due within three years
Unrecorded Unconditional Purchase Obligation Balance On Third Anniversary
Amount guaranteed under arrangement
Guarantee Obligations Maximum Exposure
Related party transaction, rate
Related Party Transaction Rate
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.
Debt Agreement, Maximum Borrowing Capacity
Debt Agreement Maximum Borrowing Capacity
Long-term Debt, Total
Long Term Debt
Debt Instrument, Interest Rate, Effective Percentage
Debt Instrument Interest Rate Effective Percentage
Debt instrument maturity date
Debt Instrument Maturity Date
Cost allocation percentage.
Cost allocation percentage
Cost Allocation Percentage
Potential range of levies
Loss Contingency Estimate Of Possible Loss
Deposited with Court
Litigation Settlement Expense
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]
Equity Award
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 December 31, 2018 (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 September 30, 2019 (in shares)
Outstanding as of December 31, 2018 (in shares)
Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Number Of Shares
Granted (in shares)
Share Based Compensation Arrangement By Share Based Payment Award Options Grants In Period Gross
Forfeited (in shares)
Sharebased Compensation Arrangement By Sharebased Payment Award Options Nonvested Options Forfeited Number Of Shares
Outstanding as of September 30, 2019 (in shares)
Treasury stock, shares acquired
Treasury stock, value acquired cost method
Amount of operating lease expense and short-term lease expense which is not included in ASC 842 per expedient rules offered.
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]
Europe
Operating Activities
Statement Operating Activities Segment [Axis]
Operating Activities
Segment Operating Activities [Domain]
Continuing Operations
Segment Continuing Operations [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 Profit, from Continuing Operations
Gross Profit
Lease expense
Operating Lease Expense Including Short Term Lease Expense
Administrative and general
General And Administrative Expense Including Short Term Lease Expense
Other Costs and Expenses
Other Cost And Expense Operating
Gain on Asset Dispositions and Impairments
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
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 Method Investments
Equity in (Losses) Earnings of 50% or Less Owned Companies
Equity In Earnings Losses Of Owned Companies
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.
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]
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
Assets from discontinued operations
Assets Of Disposal Group Including Discontinued Operation
Total current liabilities
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
Depreciation
Disposal Group Including Discontinued Operation Depreciation And Amortization
(Loss) Gain on Asset Dispositions and Impairments, Net
Disposal Group Including Discontinued Operation Gain Loss On Assets Disposition And Impairments Net
Operating (Loss) 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) Income 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
Disposal Group Including Discontinued Operation Income Tax Expense Benefit
Operating (Loss) 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 (Loss) Income from Discontinued Operations
Disposal group not discontinued operation anticipate gain loss on disposal.
Disposal group not discontinued operation reduction in loss on disposal.
Emergency response and rescue vessel member.
ERRV
Emergency Response And Rescue Vessel [Member]
Loss on sale of business
Disposal Group Not Discontinued Operation Anticipate Gain Loss On Disposal
Reduction in loss on sale of business
Disposal Group Not Discontinued Operation Reduction In Loss On Disposal