10-K Filing

SEACOR MARINE HOLDINGS INC. CIK: 1690334 FY 2019

Filing Information

Form Type	10-K
Accession Number	`0001564590-20-008689`
Period End Date	20191231
Filing Date	20200304
Fiscal Year	2019
Fiscal Period	FY
XBRL Instance	smhi-20191231.xml

Filing Contents

This filing contains the following financial statements:

Balance Sheet 115 Income Statement 158 Cash Flow Statement 132 Stockholders Equity 53 Comprehensive Income 39

Balance Sheet 115 line items

Line Item	Tag	Value	Unit	Period
Trade receivables, allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$455.00K	USD	Point-in-time
Trade receivables, allowance for doubtful accounts	`AllowanceForDoubtfulAccountsReceivableCurrent`	$860.00K	USD	Point-in-time
Preferred stock, par value (in dollars per share)	`PreferredStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Preferred stock, par value (in dollars per share)	`PreferredStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Preferred stock, shares authorized (in shares)	`PreferredStockSharesAuthorized`	10.00M	shares	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$83.94M	USD	Point-in-time
Cash and cash equivalents	`CashAndCashEquivalentsAtCarryingValue`	$91.60M	USD	Point-in-time
Preferred stock, shares authorized (in shares)	`PreferredStockSharesAuthorized`	10.00M	shares	Point-in-time
Restricted cash	`RestrictedCashAndCashEquivalents`	$3.10M	USD	Point-in-time
Restricted cash	`RestrictedCashAndCashEquivalents`	$1.66M	USD	Point-in-time
Preferred stock, shares issued (in shares)	`PreferredStockSharesIssued`	0.00	shares	Point-in-time
Preferred stock, shares issued (in shares)	`PreferredStockSharesIssued`	0.00	shares	Point-in-time
Preferred stock, shares outstanding (in shares)	`PreferredStockSharesOutstanding`	0.00	shares	Point-in-time
Preferred stock, shares outstanding (in shares)	`PreferredStockSharesOutstanding`	0.00	shares	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Trade, net of allowance for doubtful accounts of $455 and $860 in 2019 and 2018, respectively	`AccountsReceivableNetCurrent`	$55.05M	USD	Point-in-time
Common stock, par value (in dollars per share)	`CommonStockParOrStatedValuePerShare`	$0.01	USD	Point-in-time
Trade, net of allowance for doubtful accounts of $455 and $860 in 2019 and 2018, respectively	`AccountsReceivableNetCurrent`	$49.13M	USD	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	60.00M	shares	Point-in-time
Common stock, shares authorized (in shares)	`CommonStockSharesAuthorized`	60.00M	shares	Point-in-time
Other	`OtherReceivablesNetCurrent`	$18.53M	USD	Point-in-time
Other	`OtherReceivablesNetCurrent`	$11.29M	USD	Point-in-time
Inventories	`InventoryNet`	$1.23M	USD	Point-in-time
Common stock, shares issued (in shares)	`CommonStockSharesIssued`	20.44M	shares	Point-in-time
Inventories	`InventoryNet`	$1.98M	USD	Point-in-time
Common stock, shares issued (in shares)	`CommonStockSharesIssued`	21.93M	shares	Point-in-time
Shares held in treasury (in shares)	`TreasuryStockShares`	4,007.00	shares	Point-in-time
Shares held in treasury (in shares)	`TreasuryStockShares`	47,185.00	shares	Point-in-time
Prepaid expenses and other	`PrepaidExpenseAndOtherAssetsCurrent`	$2.24M	USD	Point-in-time
Prepaid expenses and other	`PrepaidExpenseAndOtherAssetsCurrent`	$2.61M	USD	Point-in-time
Assets held for sale	`AssetsOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$15.22M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$158.55M	USD	Point-in-time
Total current assets	`AssetsCurrent`	$179.03M	USD	Point-in-time
Historical cost	`PropertyPlantAndEquipmentGross`	$976.98M	USD	Point-in-time
Historical cost	`PropertyPlantAndEquipmentGross`	$1.06B	USD	Point-in-time
Historical cost	`PropertyPlantAndEquipmentGross`	$1.12B	USD	Point-in-time
Accumulated depreciation	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$358.96M	USD	Point-in-time
Accumulated depreciation	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$461.40M	USD	Point-in-time
Accumulated depreciation	`AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment`	$459.89M	USD	Point-in-time
Property and equipment	`PropertyPlantAndEquipmentExcludingConstructionInProgress`	$655.18M	USD	Point-in-time
Property and equipment	`PropertyPlantAndEquipmentExcludingConstructionInProgress`	$618.02M	USD	Point-in-time
Property and equipment	`PropertyPlantAndEquipmentExcludingConstructionInProgress`	$598.41M	USD	Point-in-time
Construction in progress	`ConstructionInProgressGross`	$88.92M	USD	Point-in-time
Construction in progress	`ConstructionInProgressGross`	$74.34M	USD	Point-in-time
Net property and equipment	`PropertyPlantAndEquipmentNet`	$744.10M	USD	Point-in-time
Net property and equipment	`PropertyPlantAndEquipmentNet`	$692.36M	USD	Point-in-time
Right-of-Use Asset - Operating Leases	`OperatingLeaseRightOfUseAsset`	$17.31M	USD	Point-in-time
Investments, at Equity, and Advances to 50% or Less Owned Companies	`InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures`	$124.68M	USD	Point-in-time
Investments, at Equity, and Advances to 50% or Less Owned Companies	`InvestmentsInAffiliatesSubsidiariesAssociatesAndJointVentures`	$121.77M	USD	Point-in-time
Construction Reserve Funds	`ConstructionReserveFunds`	$12.89M	USD	Point-in-time
Construction Reserve Funds	`ConstructionReserveFunds`	$28.06M	USD	Point-in-time
Other Assets	`OtherAssetsNoncurrent`	$3.69M	USD	Point-in-time
Other Assets	`OtherAssetsNoncurrent`	$3.40M	USD	Point-in-time
Assets Held for Sale	`DisposalGroupIncludingDiscontinuedOperationAssetsNoncurrent`	$26.28M	USD	Point-in-time
Total assets	`Assets`	$1.01B	USD	Point-in-time
Total assets	`Assets`	$1.10B	USD	Point-in-time
Current portion of operating lease liabilities	`OperatingLeaseLiabilityCurrent`	$15.10M	USD	Point-in-time
Current portion of long-term debt	`LongTermDebtCurrent`	$16.81M	USD	Point-in-time
Current portion of long-term debt	`LongTermDebtCurrent`	$17.80M	USD	Point-in-time
Accounts payable and accrued expenses	`AccountsPayableAndAccruedLiabilitiesCurrent`	$18.09M	USD	Point-in-time
Accounts payable and accrued expenses	`AccountsPayableAndAccruedLiabilitiesCurrent`	$25.69M	USD	Point-in-time
Due to SEACOR Holdings	`DueToAffiliateCurrent`	$74.00K	USD	Point-in-time
Due to SEACOR Holdings	`DueToAffiliateCurrent`	$452.00K	USD	Point-in-time
Accrued wages and benefits	`EmployeeRelatedLiabilitiesCurrent`	$4.12M	USD	Point-in-time
Accrued wages and benefits	`EmployeeRelatedLiabilitiesCurrent`	$1.83M	USD	Point-in-time
Accrued interest	`InterestAndDividendsPayableCurrent`	$731.00K	USD	Point-in-time
Accrued interest	`InterestAndDividendsPayableCurrent`	$1.10M	USD	Point-in-time
Accrued income taxes	`AccruedIncomeTaxesCurrent`	$1.92M	USD	Point-in-time
Accrued capital, repair and maintenance expenditures	`AccruedCapitalRepairAndMaintenanceExpendituresCurrent`	$16.00M	USD	Point-in-time
Accrued capital, repair and maintenance expenditures	`AccruedCapitalRepairAndMaintenanceExpendituresCurrent`	$18.76M	USD	Point-in-time
Deferred and Unearned revenues	`ContractWithCustomerLiabilityCurrent`	$5.33M	USD	Point-in-time
Deferred and Unearned revenues	`ContractWithCustomerLiabilityCurrent`	$1.46M	USD	Point-in-time
Accrued insurance deductibles and premiums	`AccruedInsuranceCurrent`	$3.56M	USD	Point-in-time
Accrued insurance deductibles and premiums	`AccruedInsuranceCurrent`	$3.40M	USD	Point-in-time
Accrued professional fees	`AccruedProfessionalFeesCurrent`	$918.00K	USD	Point-in-time
Accrued professional fees	`AccruedProfessionalFeesCurrent`	$871.00K	USD	Point-in-time
Derivatives	`DerivativeLiabilitiesCurrent`	$1.66M	USD	Point-in-time
Derivatives	`DerivativeLiabilitiesCurrent`	$3.01M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$12.40M	USD	Point-in-time
Other current liabilities	`OtherLiabilitiesCurrent`	$4.82M	USD	Point-in-time
Liabilities associated with assets held for sale	`LiabilitiesOfDisposalGroupIncludingDiscontinuedOperationCurrent`	$2.53M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$94.82M	USD	Point-in-time
Total current liabilities	`LiabilitiesCurrent`	$83.62M	USD	Point-in-time
Long-Term Operating Lease Liabilities	`OperatingLeaseLiabilityNoncurrent`	$9.82M	USD	Point-in-time
Long-Term Debt	`LongTermDebtNoncurrent`	$387.85M	USD	Point-in-time
Long-Term Debt	`LongTermDebtNoncurrent`	$380.25M	USD	Point-in-time
Conversion Option Liability on Convertible Senior Notes	`DerivativeLiabilitiesNoncurrent`	$5.21M	USD	Point-in-time
Conversion Option Liability on Convertible Senior Notes	`DerivativeLiabilitiesNoncurrent`	$5.28M	USD	Point-in-time
Deferred Income Taxes	`DeferredTaxLiabilitiesNoncurrent`	$33.91M	USD	Point-in-time
Deferred Income Taxes	`DeferredTaxLiabilitiesNoncurrent`	$44.69M	USD	Point-in-time
Deferred Gains and Other Liabilities	`OtherLiabilitiesNoncurrent`	$6.27M	USD	Point-in-time
Deferred Gains and Other Liabilities	`OtherLiabilitiesNoncurrent`	$26.57M	USD	Point-in-time
Total liabilities	`Liabilities`	$548.00M	USD	Point-in-time
Total liabilities	`Liabilities`	$530.27M	USD	Point-in-time
Preferred stock, $.01 par value, 10,000,000 shares authorized; none issued nor outstanding	`PreferredStockValue`	-	USD	Point-in-time
Preferred stock, $.01 par value, 10,000,000 shares authorized; none issued nor outstanding	`PreferredStockValue`	-	USD	Point-in-time
Common stock, $.01 par value, 60,000,000 shares authorized; 21,928,674 and 20,443,215 shares issued in 2019 and 2018, respectively	`CommonStockValue`	$219.00K	USD	Point-in-time
Common stock, $.01 par value, 60,000,000 shares authorized; 21,928,674 and 20,443,215 shares issued in 2019 and 2018, respectively	`CommonStockValue`	$204.00K	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapital`	$429.32M	USD	Point-in-time
Additional paid-in capital	`AdditionalPaidInCapital`	$415.37M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$27.08M	USD	Point-in-time
Retained earnings	`RetainedEarningsAccumulatedDeficit`	$126.83M	USD	Point-in-time
Shares held in treasury of 47,185 and 4,007 in 2019 and 2018, respectively, at cost	`TreasuryStockValue`	$91.00K	USD	Point-in-time
Shares held in treasury of 47,185 and 4,007 in 2019 and 2018, respectively, at cost	`TreasuryStockValue`	$669.00K	USD	Point-in-time
Accumulated other comprehensive loss, net of tax	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$1.55M	USD	Point-in-time
Accumulated other comprehensive loss, net of tax	`AccumulatedOtherComprehensiveIncomeLossNetOfTax`	$-16.79M	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$457.49M	USD	Point-in-time
Total stockholders equity	`StockholdersEquity`	$525.53M	USD	Point-in-time
Noncontrolling interests in subsidiaries	`MinorityInterest`	$21.43M	USD	Point-in-time
Noncontrolling interests in subsidiaries	`MinorityInterest`	$29.40M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$554.93M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$523.17M	USD	Point-in-time
Total equity	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$478.92M	USD	Point-in-time
Total liabilities and equity	`LiabilitiesAndStockholdersEquity`	$1.10B	USD	Point-in-time
Total liabilities and equity	`LiabilitiesAndStockholdersEquity`	$1.01B	USD	Point-in-time

Income Statement 158 line items

Line Item	Tag	Value	Unit	Period
Operating Revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$49.07M	USD	1 Quarter
Operating Revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$38.63M	USD	1 Quarter
Loss on disposal of business	`DiscontinuedOperationGainLossOnDisposalOfDiscontinuedOperationNetOfTax`	$-9.11M	USD	Annual
Operating Revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$44.91M	USD	1 Quarter
Operating Revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$58.90M	USD	1 Quarter
Operating Revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$201.49M	USD	Annual
Operating Revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$52.81M	USD	1 Quarter
Operating Revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$123.42M	USD	Annual
Operating Revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$47.87M	USD	1 Quarter
Operating Revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$58.17M	USD	1 Quarter
Operating Revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$203.57M	USD	Annual
Operating Revenues	`RevenueFromContractWithCustomerIncludingAssessedTax`	$54.70M	USD	1 Quarter
Operating	`OperatingCostsAndExpenses`	$123.72M	USD	Annual
Operating	`OperatingCostsAndExpenses`	$132.27M	USD	Annual
Operating	`OperatingCostsAndExpenses`	$104.82M	USD	Annual
Administrative and general	`GeneralAndAdministrativeExpense`	$49.87M	USD	Annual
Administrative and general	`GeneralAndAdministrativeExpense`	$46.45M	USD	Annual
Administrative and general	`GeneralAndAdministrativeExpense`	$44.73M	USD	Annual
Lease expense	`LeaseExpense`	$14.45M	USD	Annual
Lease expense	`LeaseExpense`	$16.16M	USD	Annual
Lease expense	`LeaseExpense`	$13.24M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$68.84M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$64.01M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$60.31M	USD	Annual
Costs and expenses	`CostsAndExpenses`	$248.62M	USD	Annual
Costs and expenses	`CostsAndExpenses`	$260.81M	USD	Annual
Costs and expenses	`CostsAndExpenses`	$229.44M	USD	Annual
Losses on Asset Dispositions and Impairments, Net	`GainLossOnSalesOfAssetsAndAssetImpairmentCharges`	$-23.62M	USD	Annual
Losses on Asset Dispositions and Impairments, Net	`GainLossOnSalesOfAssetsAndAssetImpairmentCharges`	$-5.40M	USD	Annual
Losses on Asset Dispositions and Impairments, Net	`GainLossOnSalesOfAssetsAndAssetImpairmentCharges`	$-11.27M	USD	Annual
Operating Loss	`OperatingIncomeLoss`	$-24.21M	USD	1 Quarter
Operating Loss	`OperatingIncomeLoss`	$-17.64M	USD	1 Quarter
Operating Loss	`OperatingIncomeLoss`	$-20.84M	USD	1 Quarter
Operating Loss	`OperatingIncomeLoss`	$-10.50M	USD	1 Quarter
Operating Loss	`OperatingIncomeLoss`	$-12.21M	USD	1 Quarter
Operating Loss	`OperatingIncomeLoss`	$-11.25M	USD	1 Quarter
Operating Loss	`OperatingIncomeLoss`	$-21.03M	USD	1 Quarter
Operating Loss	`OperatingIncomeLoss`	$-52.53M	USD	Annual
Operating Loss	`OperatingIncomeLoss`	$-68.51M	USD	Annual
Operating Loss	`OperatingIncomeLoss`	$-3.35M	USD	1 Quarter
Operating Loss	`OperatingIncomeLoss`	$-129.64M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$1.22M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$1.45M	USD	Annual
Interest income	`InvestmentIncomeInterest`	$1.80M	USD	Annual
Interest expense	`InterestExpense`	$27.40M	USD	Annual
Interest expense	`InterestExpense`	$16.04M	USD	Annual
Interest expense	`InterestExpense`	$30.06M	USD	Annual
SEACOR Holdings management fees	`ManagementFeeRelatedParty`	$3.21M	USD	Annual
SEACOR Holdings guarantee fees	`GuaranteeFeesRelatedParty`	$201.00K	USD	Annual
SEACOR Holdings guarantee fees	`GuaranteeFeesRelatedParty`	$108.00K	USD	Annual
SEACOR Holdings guarantee fees	`GuaranteeFeesRelatedParty`	$29.00K	USD	Annual
Loss on Debt Extinguishment	`GainsLossesOnExtinguishmentOfDebt`	$-638.00K	USD	Annual
Marketable security gains (losses), net	`MarketableSecuritiesGainLoss`	$10.93M	USD	Annual
Derivative gains, net	`GainLossOnDerivativeInstrumentsNetPretax`	$2.85M	USD	Annual
Derivative gains, net	`GainLossOnDerivativeInstrumentsNetPretax`	$71.00K	USD	Annual
Derivative gains, net	`GainLossOnDerivativeInstrumentsNetPretax`	$20.26M	USD	Annual
Foreign currency losses, net	`ForeignCurrencyTransactionGainLossBeforeTax`	$-1.40M	USD	Annual
Foreign currency losses, net	`ForeignCurrencyTransactionGainLossBeforeTax`	$-1.66M	USD	Annual
Foreign currency losses, net	`ForeignCurrencyTransactionGainLossBeforeTax`	$-1.67M	USD	Annual
Other, net	`OtherNonoperatingIncomeExpense`	$677.00K	USD	Annual
Other, net	`OtherNonoperatingIncomeExpense`	$-6.00K	USD	Annual
Other, net	`OtherNonoperatingIncomeExpense`	$-1.00K	USD	Annual
Nonoperating income expense	`NonoperatingIncomeExpense`	$-24.71M	USD	Annual
Nonoperating income expense	`NonoperatingIncomeExpense`	$-30.31M	USD	Annual
Nonoperating income expense	`NonoperatingIncomeExpense`	$11.85M	USD	Annual
Loss from Continuing Operations Before Tax Benefit and Equity in Earnings (Losses) of 50% or Less Owned Companies	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$-93.22M	USD	Annual
Loss from Continuing Operations Before Tax Benefit and Equity in Earnings (Losses) of 50% or Less Owned Companies	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$-82.84M	USD	Annual
Loss from Continuing Operations Before Tax Benefit and Equity in Earnings (Losses) of 50% or Less Owned Companies	`IncomeLossFromContinuingOperationsBeforeIncomeTaxesMinorityInterestAndIncomeLossFromEquityMethodInvestments`	$-117.79M	USD	Annual
Current	`CurrentIncomeTaxExpenseBenefit`	$4.96M	USD	Annual
Current	`CurrentIncomeTaxExpenseBenefit`	$9.38M	USD	Annual
Current	`CurrentIncomeTaxExpenseBenefit`	$-13.40M	USD	Annual
Deferred	`DeferredIncomeTaxExpenseBenefit`	$-61.01M	USD	Annual
Deferred	`DeferredIncomeTaxExpenseBenefit`	$-12.87M	USD	Annual
Deferred	`DeferredIncomeTaxExpenseBenefit`	$-22.74M	USD	Annual
Income Tax Expense (Benefit)	`IncomeTaxExpenseBenefit`	$-74.41M	USD	Annual
Income Tax Expense (Benefit)	`IncomeTaxExpenseBenefit`	$-7.91M	USD	Annual
Income Tax Expense (Benefit)	`IncomeTaxExpenseBenefit`	$-13.35M	USD	Annual
Loss Before Equity in (Losses) Earnings of 50% or Less Owned Companies	`IncomeLossFromContinuingOperationsBeforeEquityMethodInvestmentsAndNoncontrollingInterestAfterTax`	$-74.92M	USD	Annual
Loss Before Equity in (Losses) Earnings of 50% or Less Owned Companies	`IncomeLossFromContinuingOperationsBeforeEquityMethodInvestmentsAndNoncontrollingInterestAfterTax`	$-43.38M	USD	Annual
Loss Before Equity in (Losses) Earnings of 50% or Less Owned Companies	`IncomeLossFromContinuingOperationsBeforeEquityMethodInvestmentsAndNoncontrollingInterestAfterTax`	$-79.87M	USD	Annual
Equity in (Losses) Earnings of 50% or Less Owned Companies, Net of Tax	`IncomeLossFromEquityMethodInvestments`	$3.85M	USD	Annual
Equity in (Losses) Earnings of 50% or Less Owned Companies, Net of Tax	`IncomeLossFromEquityMethodInvestments`	$-14.30M	USD	Annual
Equity in (Losses) Earnings of 50% or Less Owned Companies, Net of Tax	`IncomeLossFromEquityMethodInvestments`	$-3.55M	USD	Annual
Loss from Continuing Operations	`IncomeLossFromContinuingOperations`	$-7.78M	USD	1 Quarter
Loss from Continuing Operations	`IncomeLossFromContinuingOperations`	$-31.43M	USD	1 Quarter
Loss from Continuing Operations	`IncomeLossFromContinuingOperations`	$-89.23M	USD	Annual
Loss from Continuing Operations	`IncomeLossFromContinuingOperations`	$-39.53M	USD	Annual
Loss from Continuing Operations	`IncomeLossFromContinuingOperations`	$-26.50M	USD	1 Quarter
Loss from Continuing Operations	`IncomeLossFromContinuingOperations`	$-19.18M	USD	1 Quarter
Loss from Continuing Operations	`IncomeLossFromContinuingOperations`	$-17.71M	USD	1 Quarter
Loss from Continuing Operations	`IncomeLossFromContinuingOperations`	$-83.42M	USD	Annual
Loss from Continuing Operations	`IncomeLossFromContinuingOperations`	$-28.27M	USD	1 Quarter
Loss from Continuing Operations	`IncomeLossFromContinuingOperations`	$-31.44M	USD	1 Quarter
Loss from Continuing Operations	`IncomeLossFromContinuingOperations`	$-10.34M	USD	1 Quarter
(Loss) Income on Discontinued Operations, Net of Tax (including loss on disposal of $9,106)	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$989.00K	USD	Annual
(Loss) Income on Discontinued Operations, Net of Tax (including loss on disposal of $9,106)	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$1.37M	USD	Annual
(Loss) Income on Discontinued Operations, Net of Tax (including loss on disposal of $9,106)	`IncomeLossFromDiscontinuedOperationsNetOfTax`	$-9.47M	USD	Annual
Net Loss	`ProfitLoss`	$-38.54M	USD	Annual
Net Loss	`ProfitLoss`	$-7.97M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-31.69M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-30.26M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-82.05M	USD	Annual
Net Loss	`ProfitLoss`	$-15.77M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-28.27M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-18.24M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-26.63M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-21.92M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-98.69M	USD	Annual
Net Loss attributable to Noncontrolling Interests in Subsidiaries	`NetIncomeLossAttributableToNoncontrollingInterest`	$-5.64M	USD	Annual
Net Loss attributable to Noncontrolling Interests in Subsidiaries	`NetIncomeLossAttributableToNoncontrollingInterest`	$-5.86M	USD	Annual
Net Loss attributable to Noncontrolling Interests in Subsidiaries	`NetIncomeLossAttributableToNoncontrollingInterest`	$-4.44M	USD	Annual
Net Loss attributable to SEACOR Marine Holdings Inc.	`NetIncomeLoss`	$-25.55M	USD	1 Quarter
Net Loss attributable to SEACOR Marine Holdings Inc.	`NetIncomeLoss`	$-7.79M	USD	1 Quarter
Net Loss attributable to SEACOR Marine Holdings Inc.	`NetIncomeLoss`	$-92.84M	USD	Annual
Net Loss attributable to SEACOR Marine Holdings Inc.	`NetIncomeLoss`	$-28.83M	USD	1 Quarter
Net Loss attributable to SEACOR Marine Holdings Inc.	`NetIncomeLoss`	$-20.45M	USD	1 Quarter
Net Loss attributable to SEACOR Marine Holdings Inc.	`NetIncomeLoss`	$-25.02M	USD	1 Quarter
Net Loss attributable to SEACOR Marine Holdings Inc.	`NetIncomeLoss`	$-28.39M	USD	1 Quarter
Net Loss attributable to SEACOR Marine Holdings Inc.	`NetIncomeLoss`	$-77.61M	USD	Annual
Net Loss attributable to SEACOR Marine Holdings Inc.	`NetIncomeLoss`	$-32.90M	USD	Annual
Net Loss attributable to SEACOR Marine Holdings Inc.	`NetIncomeLoss`	$-18.44M	USD	1 Quarter
Net Loss attributable to SEACOR Marine Holdings Inc.	`NetIncomeLoss`	$-15.96M	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicAndDilutedShare`	$-1.93	USD	Annual
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicAndDilutedShare`	$-1.16	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicAndDilutedShare`	$-0.85	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicAndDilutedShare`	$-3.55	USD	Annual
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicAndDilutedShare`	$-1.18	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicAndDilutedShare`	$-1.63	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicAndDilutedShare`	$-0.39	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicAndDilutedShare`	$-1.31	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicAndDilutedShare`	$-0.49	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicAndDilutedShare`	$-0.74	USD	1 Quarter
Continuing operations	`IncomeLossFromContinuingOperationsPerBasicAndDilutedShare`	$-3.77	USD	Annual
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare`	$-0.40	USD	Annual
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare`	$0.07	USD	Annual
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare`	$0.10	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare`	$0.06	USD	Annual
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare`	$0.14	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare`	$-0.29	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare`	$-0.01	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare`	$0.04	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare`	$-0.01	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare`	$0.05	USD	1 Quarter
Discontinued operations	`IncomeLossFromDiscontinuedOperationsNetOfTaxPerBasicAndDilutedShare`	$-0.12	USD	1 Quarter
Basic and Diluted Income (Loss) Per Common Share and Warrants	`EarningsPerShareBasicAndDiluted`	$-3.95	USD	Annual
Basic and Diluted Income (Loss) Per Common Share and Warrants	`EarningsPerShareBasicAndDiluted`	$-0.78	USD	1 Quarter
Basic and Diluted Income (Loss) Per Common Share and Warrants	`EarningsPerShareBasicAndDiluted`	$-0.35	USD	1 Quarter
Basic and Diluted Income (Loss) Per Common Share and Warrants	`EarningsPerShareBasicAndDiluted`	$-1.21	USD	1 Quarter
Basic and Diluted Income (Loss) Per Common Share and Warrants	`EarningsPerShareBasicAndDiluted`	$-1.64	USD	1 Quarter
Basic and Diluted Income (Loss) Per Common Share and Warrants	`EarningsPerShareBasicAndDiluted`	$-1.19	USD	1 Quarter
Basic and Diluted Income (Loss) Per Common Share and Warrants	`EarningsPerShareBasicAndDiluted`	$-1.11	USD	1 Quarter
Basic and Diluted Income (Loss) Per Common Share and Warrants	`EarningsPerShareBasicAndDiluted`	$-3.70	USD	Annual
Basic and Diluted Income (Loss) Per Common Share and Warrants	`EarningsPerShareBasicAndDiluted`	$-0.71	USD	1 Quarter
Basic and Diluted Income (Loss) Per Common Share and Warrants	`EarningsPerShareBasicAndDiluted`	$-0.86	USD	1 Quarter
Basic and Diluted Income (Loss) Per Common Share and Warrants	`EarningsPerShareBasicAndDiluted`	$-1.87	USD	Annual
Basic and diluted shares	`WeightedAverageNumberOfShareOutstandingBasicAndDiluted`	23.51M	shares	Annual
Basic and diluted shares	`WeightedAverageNumberOfShareOutstandingBasicAndDiluted`	20.93M	shares	Annual
Basic and diluted shares	`WeightedAverageNumberOfShareOutstandingBasicAndDiluted`	17.60M	shares	Annual

Cash Flow Statement 132 line items

Line Item	Tag	Value	Unit	Period
Net Loss	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$83.42M	USD	Annual
Net Loss	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$39.53M	USD	Annual
Net Loss	`IncomeLossFromContinuingOperationsIncludingPortionAttributableToNoncontrollingInterest`	$98.33M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$68.84M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$64.01M	USD	Annual
Depreciation and amortization	`DepreciationDepletionAndAmortization`	$60.31M	USD	Annual
Deferred financing cost amortization	`AmortizationOfFinancingCosts`	$2.34M	USD	Annual
Deferred financing cost amortization	`AmortizationOfFinancingCosts`	$2.02M	USD	Annual
Deferred financing cost amortization	`AmortizationOfFinancingCosts`	$1.18M	USD	Annual
Amortization of deferred gains against charter expense	`SaleLeasebackTransactionCurrentPeriodGainRecognized`	$8.04M	USD	Annual
Amortization of deferred gains against charter expense	`SaleLeasebackTransactionCurrentPeriodGainRecognized`	$8.12M	USD	Annual
Debt discount and issue cost amortization, net	`AmortizationOfDebtDiscountPremium`	$5.66M	USD	Annual
Debt discount and issue cost amortization, net	`AmortizationOfDebtDiscountPremium`	$4.45M	USD	Annual
Debt discount and issue cost amortization, net	`AmortizationOfDebtDiscountPremium`	$5.35M	USD	Annual
Director share awards	`DirectorStockAwards`	$893.00K	USD	Annual
Director share awards	`DirectorStockAwards`	$894.00K	USD	Annual
Director share awards	`DirectorStockAwards`	$681.00K	USD	Annual
Restricted stock amortization	`RestrictedStockExpense`	$5.05M	USD	Annual
Restricted stock amortization	`RestrictedStockExpense`	$3.49M	USD	Annual
Restricted stock amortization	`RestrictedStockExpense`	$638.00K	USD	Annual
Restricted stock vesting	`RestrictedStockVesting`	$-88.00K	USD	Annual
Restricted stock vesting	`RestrictedStockVesting`	$88.00K	USD	Annual
Restricted stock vesting	`RestrictedStockVesting`	$577.00K	USD	Annual
Bad debt (recoveries) expense	`ProvisionForDoubtfulAccounts`	$-404.00K	USD	Annual
Bad debt (recoveries) expense	`ProvisionForDoubtfulAccounts`	$-880.00K	USD	Annual
Bad debt (recoveries) expense	`ProvisionForDoubtfulAccounts`	$-1.28M	USD	Annual
Losses on asset dispositions and impairments, net	`GainLossOnSalesOfAssetsAndAssetImpairmentCharges`	$-23.62M	USD	Annual
Losses on asset dispositions and impairments, net	`GainLossOnSalesOfAssetsAndAssetImpairmentCharges`	$-5.40M	USD	Annual
Losses on asset dispositions and impairments, net	`GainLossOnSalesOfAssetsAndAssetImpairmentCharges`	$-11.27M	USD	Annual
Loss on sale of Emergency Response Rescue Vessels ("ERRV")	`GainLossOnSaleOfEmergencyResponseRescueVessels`	$-9.11M	USD	Annual
Gain from other sales	`GainLossOnSaleOfOtherAssets`	$428.00K	USD	Annual
Marketable security (gains) losses, net	`MarketableSecuritiesGainLoss`	$10.93M	USD	Annual
Proceeds from sale of marketable securities	`ProceedsFromSaleOfSecuritiesOperatingActivities`	$51.88M	USD	Annual
Derivative gains, net	`GainLossOnDerivativeInstrumentsNetPretax`	$2.85M	USD	Annual
Derivative gains, net	`GainLossOnDerivativeInstrumentsNetPretax`	$71.00K	USD	Annual
Derivative gains, net	`GainLossOnDerivativeInstrumentsNetPretax`	$20.26M	USD	Annual
Cash settlements on derivative transactions, net	`PaymentsForProceedsFromDerivativeInstrumentsOperatingActivities`	$536.00K	USD	Annual
Cash settlements on derivative transactions, net	`PaymentsForProceedsFromDerivativeInstrumentsOperatingActivities`	$-1.37M	USD	Annual
Cash settlements on derivative transactions, net	`PaymentsForProceedsFromDerivativeInstrumentsOperatingActivities`	$512.00K	USD	Annual
Foreign currency losses, net	`ForeignCurrencyTransactionLossBeforeTax`	$1.66M	USD	Annual
Foreign currency losses, net	`ForeignCurrencyTransactionLossBeforeTax`	$1.40M	USD	Annual
Foreign currency losses, net	`ForeignCurrencyTransactionLossBeforeTax`	$1.67M	USD	Annual
Deferred	`DeferredIncomeTaxExpenseBenefit`	$-61.01M	USD	Annual
Deferred	`DeferredIncomeTaxExpenseBenefit`	$-12.87M	USD	Annual
Deferred	`DeferredIncomeTaxExpenseBenefit`	$-22.74M	USD	Annual
Equity in (earnings) losses of 50% or less owned companies, net of tax	`IncomeLossFromEquityMethodInvestments`	$3.85M	USD	Annual
Equity in (earnings) losses of 50% or less owned companies, net of tax	`IncomeLossFromEquityMethodInvestments`	$-14.30M	USD	Annual
Equity in (earnings) losses of 50% or less owned companies, net of tax	`IncomeLossFromEquityMethodInvestments`	$-3.55M	USD	Annual
Dividends received from 50% or less owned companies	`ProceedsFromDividendsReceived`	$2.07M	USD	Annual
Dividends received from 50% or less owned companies	`ProceedsFromDividendsReceived`	$2.64M	USD	Annual
Dividends received from 50% or less owned companies	`ProceedsFromDividendsReceived`	$1.72M	USD	Annual
Decrease (increase) in receivables	`IncreaseDecreaseInReceivables`	$-8.49M	USD	Annual
Decrease (increase) in receivables	`IncreaseDecreaseInReceivables`	$-31.26M	USD	Annual
Decrease (increase) in receivables	`IncreaseDecreaseInReceivables`	$18.62M	USD	Annual
Decrease in prepaid expenses and other assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$-103.00K	USD	Annual
Decrease in prepaid expenses and other assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$-6.24M	USD	Annual
Decrease in prepaid expenses and other assets	`IncreaseDecreaseInPrepaidDeferredExpenseAndOtherAssets`	$-1.05M	USD	Annual
Decrease (Increase) in accounts payable, accrued expenses and other liabilities	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-2.70M	USD	Annual
Decrease (Increase) in accounts payable, accrued expenses and other liabilities	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$-23.24M	USD	Annual
Decrease (Increase) in accounts payable, accrued expenses and other liabilities	`IncreaseDecreaseInAccountsPayableAndAccruedLiabilities`	$4.31M	USD	Annual
Net cash provided by (used in) operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$9.45M	USD	Annual
Net cash provided by (used in) operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$37.64M	USD	Annual
Net cash provided by (used in) operating activities	`NetCashProvidedByUsedInOperatingActivitiesContinuingOperations`	$-59.34M	USD	Annual
Purchases of property and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$68.98M	USD	Annual
Purchases of property and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$55.46M	USD	Annual
Purchases of property and equipment	`PaymentsToAcquirePropertyPlantAndEquipment`	$51.58M	USD	Annual
Cash settlements on derivative transactions, net	`PaymentsForProceedsFromHedgeInvestingActivities`	$369.00K	USD	Annual
Proceeds from disposition of property and equipment	`ProceedsFromSaleOfPropertyPlantAndEquipment`	$10.70M	USD	Annual
Proceeds from disposition of property and equipment	`ProceedsFromSaleOfPropertyPlantAndEquipment`	$20.14M	USD	Annual
Proceeds from disposition of property and equipment	`ProceedsFromSaleOfPropertyPlantAndEquipment`	$56.18M	USD	Annual
Cash impact of sale of ERRV fleet	`PaymentsForProceedsFromCashImpactOfSaleOfERRVFleet`	$5.14M	USD	Annual
Sale of subsidiary to joint venture	`ProceedsFromDivestitureOfInterestInJointVenture`	$8.02M	USD	Annual
Investments in and advances to 50% or less owned companies	`PaymentsToAcquireEquityMethodInvestments`	$43.73M	USD	Annual
Investments in and advances to 50% or less owned companies	`PaymentsToAcquireEquityMethodInvestments`	$17.42M	USD	Annual
Investments in and advances to 50% or less owned companies	`PaymentsToAcquireEquityMethodInvestments`	$5.47M	USD	Annual
Return of investments and advances from 50% or less owned companies	`ProceedsFromInvestmentsDistributionReturnOfCapital`	$7.55M	USD	Annual
Return of investments and advances from 50% or less owned companies	`ProceedsFromInvestmentsDistributionReturnOfCapital`	$16.26M	USD	Annual
Return of investments and advances from 50% or less owned companies	`ProceedsFromInvestmentsDistributionReturnOfCapital`	$461.00K	USD	Annual
Net decrease in construction reserve funds	`PaymentsForProceedsFromOtherInvestingActivities`	$-32.85M	USD	Annual
Net decrease in construction reserve funds	`PaymentsForProceedsFromOtherInvestingActivities`	$-15.17M	USD	Annual
Net decrease in construction reserve funds	`PaymentsForProceedsFromOtherInvestingActivities`	$-17.30M	USD	Annual
Principal payments on notes due from equity investees	`RepaymentOfNotesReceivableFromRelatedParties`	$116.00K	USD	Annual
Principal payments on notes due from equity investees	`RepaymentOfNotesReceivableFromRelatedParties`	$22.00K	USD	Annual
Cash assumed on consolidation of 50% or less owned companies	`ProceedsFromDivestitureOfBusinessesAndInterestsInAffiliates`	$1.94M	USD	Annual
Business acquisitions, net of cash acquired	`PaymentsToAcquireBusinessesNetOfCashAcquired`	$9.75M	USD	Annual
Net cash provided by (used in) investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-33.47M	USD	Annual
Net cash provided by (used in) investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$21.21M	USD	Annual
Net cash provided by (used in) investing activities	`NetCashProvidedByUsedInInvestingActivitiesContinuingOperations`	$-31.53M	USD	Annual
Payments on long-term debt	`RepaymentsOfLongTermDebt`	$49.41M	USD	Annual
Payments on long-term debt	`RepaymentsOfLongTermDebt`	$23.97M	USD	Annual
Payments on long-term debt	`RepaymentsOfLongTermDebt`	$11.93M	USD	Annual
Proceeds from issuance of long-term debt, net of issue costs	`ProceedsFromDebtNetOfIssuanceCosts`	$6.54M	USD	Annual
Proceeds from issuance of long-term debt, net of issue costs	`ProceedsFromDebtNetOfIssuanceCosts`	$62.02M	USD	Annual
Proceeds from exercise of stock options and warrants	`ProceedsFromStockOptionsAndWarrantsExercised`	$1.42M	USD	Annual
Proceeds from exercise of stock options and warrants	`ProceedsFromStockOptionsAndWarrantsExercised`	$833.00K	USD	Annual
Distribution of SEACOR Marine restricted stock to Company personnel by SEACOR Holdings	`ProceedsFromPaymentsForOtherFinancingActivities`	$-2.66M	USD	Annual
Issuance of stock	`ProceedsFromIssuanceOfCommonStock`	$43.00M	USD	Annual
Issuance of warrants	`ProceedsFromIssuanceOfWarrants`	$12.81M	USD	Annual
Purchase of subsidiary shares from noncontrolling interests	`PaymentToSubsidiarySharesFromNoncontrollingInterests`	$3.39M	USD	Annual
Purchase of subsidiary shares from noncontrolling interests	`PaymentToSubsidiarySharesFromNoncontrollingInterests`	$3.69M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-25.94M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$69.25M	USD	Annual
Net cash provided by (used in) financing activities	`NetCashProvidedByUsedInFinancingActivities`	$-11.73M	USD	Annual
Effects of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$-699.00K	USD	Annual
Effects of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$-17.64M	USD	Annual
Effects of Exchange Rate Changes on Cash, Cash Equivalents and Restricted Cash	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents`	$-1.24M	USD	Annual
Net (Decrease) in Cash, Cash Equivalents and Restricted Cash, Continuing Operations	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseContinuingOperationsIncludingExchangeRateEffect`	$-6.86M	USD	Annual
Net (Decrease) in Cash, Cash Equivalents and Restricted Cash, Continuing Operations	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseContinuingOperationsIncludingExchangeRateEffect`	$-12.93M	USD	Annual
Net (Decrease) in Cash, Cash Equivalents and Restricted Cash, Continuing Operations	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseContinuingOperationsIncludingExchangeRateEffect`	$-24.26M	USD	Annual
Operating Activities	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$6.32M	USD	Annual
Operating Activities	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$-2.90M	USD	Annual
Operating Activities	`CashProvidedByUsedInOperatingActivitiesDiscontinuedOperations`	$5.99M	USD	Annual
Investing Activities	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$2.32M	USD	Annual
Investing Activities	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$104.00K	USD	Annual
Investing Activities	`CashProvidedByUsedInInvestingActivitiesDiscontinuedOperations`	$-5.57M	USD	Annual
Effects of Exchange Rate Changes on Cash, Restricted Cash and Cash Equivalents	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDisposalGroupIncludingDiscontinuedOperations`	$3.43M	USD	Annual
Effects of Exchange Rate Changes on Cash, Restricted Cash and Cash Equivalents	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDisposalGroupIncludingDiscontinuedOperations`	$-75.00K	USD	Annual
Effects of Exchange Rate Changes on Cash, Restricted Cash and Cash Equivalents	`EffectOfExchangeRateOnCashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsDisposalGroupIncludingDiscontinuedOperations`	$2.70M	USD	Annual
Net Decrease in Cash, Restricted Cash and Cash Equivalents on Discontinued Operations	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseDiscontinuedOperationsIncludingExchangeRateEffect`	$637.00K	USD	Annual
Net Decrease in Cash, Restricted Cash and Cash Equivalents on Discontinued Operations	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseDiscontinuedOperationsIncludingExchangeRateEffect`	$8.56M	USD	Annual
Net Decrease in Cash, Restricted Cash and Cash Equivalents on Discontinued Operations	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseDiscontinuedOperationsIncludingExchangeRateEffect`	$3.12M	USD	Annual
Net Decrease in Cash, Cash Equivalents and Restricted Cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-6.22M	USD	Annual
Net Decrease in Cash, Cash Equivalents and Restricted Cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-9.80M	USD	Annual
Net Decrease in Cash, Cash Equivalents and Restricted Cash	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect`	$-15.70M	USD	Annual
Cash, Cash Equivalents and Restricted Cash, Beginning of Year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$87.05M	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash, Beginning of Year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$96.85M	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash, Beginning of Year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$118.77M	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash, Beginning of Year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$112.55M	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash, End of Year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$87.05M	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash, End of Year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$96.85M	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash, End of Year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$118.77M	USD	Point-in-time
Cash, Cash Equivalents and Restricted Cash, End of Year	`CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsIncludingDisposalGroupAndDiscontinuedOperations`	$112.55M	USD	Point-in-time

Stockholders Equity 53 line items

Line Item	Tag	Value	Unit	Period
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$554.93M	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$523.17M	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$478.92M	USD	Point-in-time
Balance (in shares)	`CommonStockSharesIssued`	20.44M	shares	Point-in-time
Balance (in shares)	`CommonStockSharesIssued`	21.93M	shares	Point-in-time
Impact of adoption of accounting principle	`CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption`	$10.42M	USD	Point-in-time
Impact of adoption of accounting principle	`CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption`	$-12.07M	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1`	$565.35M	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1`	$511.10M	USD	Point-in-time
Issuance of Common Stock	`StockIssuedDuringPeriodValueNewIssues`	$6.60M	USD	Annual
Issuance of Common Stock	`StockIssuedDuringPeriodValueNewIssues`	$43.00M	USD	Annual
Issuance of Common Stock (in shares)	`StockIssuedDuringPeriodSharesNewIssues`	103,213.00	shares	Point-in-time
Restricted stock grants	`StockIssuedDuringPeriodValueRestrictedStockAwardGross`	$2.00K	USD	Annual
Issuance of Warrants	`AdjustmentsToAdditionalPaidInCapitalWarrantIssued`	$62.81M	USD	Annual
Amortization of employee share awards	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$3.49M	USD	Annual
Amortization of employee share awards	`AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue`	$5.05M	USD	Annual
Exercise of options	`StockIssuedDuringPeriodValueStockOptionsExercised`	$1.42M	USD	Annual
Exercise of options	`StockIssuedDuringPeriodValueStockOptionsExercised`	$833.00K	USD	Annual
Exercise of options (in shares)	`StockIssuedDuringPeriodSharesStockOptionsExercised`	113,750.00	shares	Annual
Exercise of options (in shares)	`StockIssuedDuringPeriodSharesStockOptionsExercised`	66,625.00	shares	Annual
Exercise of Warrants	`StockRepurchasedDuringPeriodValueExerciseOfWarrants`	$-3.00K	USD	Annual
Restricted stock vesting	`TreasuryStockValueAcquiredCostMethod`	$579.00K	USD	Annual
Restricted stock vesting	`TreasuryStockValueAcquiredCostMethod`	$88.00K	USD	Annual
Director share awards	`StockIssuedDuringPeriodValueIssuedForServices`	$894.00K	USD	Annual
Director share awards	`StockIssuedDuringPeriodValueIssuedForServices`	$893.00K	USD	Annual
Acquisition of consolidated joint venture	`StockGrantedDuringPeriodValueSharebasedCompensation`	$2.11M	USD	Annual
Acquisition of consolidated joint venture	`StockGrantedDuringPeriodValueSharebasedCompensation`	$12.04M	USD	Annual
Issuance of noncontrolling interests	`NoncontrollingInterestIncreaseFromSubsidiaryEquityIssuance`	$31.39M	USD	Annual
Sale of Standby Safety Fleet	`SaleOfStandbySafetyFleet`	$17.40M	USD	Annual
Dissolution of Entity	`DissolutionOfEntity`	$62.00K	USD	Annual
Net Loss	`ProfitLoss`	$-38.54M	USD	Annual
Net Loss	`ProfitLoss`	$-7.97M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-31.69M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-30.26M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-82.05M	USD	Annual
Net Loss	`ProfitLoss`	$-15.77M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-28.27M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-18.24M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-26.63M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-21.92M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-98.69M	USD	Annual
Other comprehensive loss	`OtherComprehensiveIncomeLossNetOfTax`	$-881.00K	USD	Annual
Other comprehensive loss	`OtherComprehensiveIncomeLossNetOfTax`	$18.34M	USD	Annual
Other comprehensive loss	`OtherComprehensiveIncomeLossNetOfTax`	$-4.39M	USD	Annual
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$554.93M	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$523.17M	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterest`	$478.92M	USD	Point-in-time
Balance (in shares)	`CommonStockSharesIssued`	20.44M	shares	Point-in-time
Balance (in shares)	`CommonStockSharesIssued`	21.93M	shares	Point-in-time
Impact of adoption of accounting principle	`CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption`	$10.42M	USD	Point-in-time
Impact of adoption of accounting principle	`CumulativeEffectOfNewAccountingPrincipleInPeriodOfAdoption`	$-12.07M	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1`	$565.35M	USD	Point-in-time
Balance	`StockholdersEquityIncludingPortionAttributableToNoncontrollingInterestAdjustedBalance1`	$511.10M	USD	Point-in-time

Comprehensive Income 39 line items

Line Item	Tag	Value	Unit	Period
Reclassification of derivative losses on cash flow hedges to equity in earnings	`PercentageOfOwnedCompaniesDerivativeLossesOnCashFlowHedgesReclassificationToEquityInEarnings`	0.50	pure	Annual
Reclassification of derivative losses on cash flow hedges to equity in earnings	`PercentageOfOwnedCompaniesDerivativeLossesOnCashFlowHedgesReclassificationToEquityInEarnings`	0.50	pure	Annual
Reclassification of derivative losses on cash flow hedges to equity in earnings	`PercentageOfOwnedCompaniesDerivativeLossesOnCashFlowHedgesReclassificationToEquityInEarnings`	0.50	pure	Annual
Net Loss	`ProfitLoss`	$-38.54M	USD	Annual
Net Loss	`ProfitLoss`	$-7.97M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-31.69M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-30.26M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-82.05M	USD	Annual
Net Loss	`ProfitLoss`	$-15.77M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-28.27M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-18.24M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-26.63M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-21.92M	USD	1 Quarter
Net Loss	`ProfitLoss`	$-98.69M	USD	Annual
Foreign currency translation (losses) gains, net	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax`	$4.65M	USD	Annual
Foreign currency translation (losses) gains, net	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax`	$-2.37M	USD	Annual
Foreign currency translation (losses) gains, net	`OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationGainLossBeforeReclassificationAndTax`	$20.16M	USD	Annual
Reclassification of foreign currency translation losses to foreign currency losses, net	`OtherComprehensiveIncomeLossForeignCurrencyTransactionAndTranslationReclassificationAdjustmentFromAOCIRealizedUponSaleOrLiquidationBeforeTax`	-	USD	Annual
Derivative (losses) gains on cash flow hedges	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax`	$-1.90M	USD	Annual
Derivative (losses) gains on cash flow hedges	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax`	$-1.94M	USD	Annual
Derivative (losses) gains on cash flow hedges	`OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodBeforeTax`	$214.00K	USD	Annual
Other comprehensive income	`OtherComprehensiveIncomeLossBeforeTax`	$18.16M	USD	Annual
Other comprehensive income	`OtherComprehensiveIncomeLossBeforeTax`	$5.38M	USD	Annual
Other comprehensive income	`OtherComprehensiveIncomeLossBeforeTax`	$-4.35M	USD	Annual
Income tax (expense) benefit	`OtherComprehensiveIncomeLossTax`	$6.26M	USD	Annual
Income tax (expense) benefit	`OtherComprehensiveIncomeLossTax`	$46.00K	USD	Annual
Income tax (expense) benefit	`OtherComprehensiveIncomeLossTax`	$-173.00K	USD	Annual
Other comprehensive income, net	`OtherComprehensiveIncomeLossNetOfTax`	$-881.00K	USD	Annual
Other comprehensive income, net	`OtherComprehensiveIncomeLossNetOfTax`	$18.34M	USD	Annual
Other comprehensive income, net	`OtherComprehensiveIncomeLossNetOfTax`	$-4.39M	USD	Annual
Comprehensive Loss	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$-39.42M	USD	Annual
Comprehensive Loss	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$-80.36M	USD	Annual
Comprehensive Loss	`ComprehensiveIncomeNetOfTaxIncludingPortionAttributableToNoncontrollingInterest`	$-86.45M	USD	Annual
Comprehensive Loss attributable to Noncontrolling Interests in Subsidiaries	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-5.86M	USD	Annual
Comprehensive Loss attributable to Noncontrolling Interests in Subsidiaries	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-4.54M	USD	Annual
Comprehensive Loss attributable to Noncontrolling Interests in Subsidiaries	`ComprehensiveIncomeNetOfTaxAttributableToNoncontrollingInterest`	$-5.36M	USD	Annual
Comprehensive Loss attributable to SEACOR Marine Holdings Inc.	`ComprehensiveIncomeNetOfTax`	$-81.90M	USD	Annual
Comprehensive Loss attributable to SEACOR Marine Holdings Inc.	`ComprehensiveIncomeNetOfTax`	$-34.06M	USD	Annual
Comprehensive Loss attributable to SEACOR Marine Holdings Inc.	`ComprehensiveIncomeNetOfTax`	$-74.50M	USD	Annual

Data is extracted from SEC EDGAR XBRL filings. Values shown are as reported in the filing.