$WLFC
WILLIS LEASE FINANCE CORP Stock $wlfc

$wlfc Overview Financials Valuation SEC Filings Company Website

2020 Q4 Form 10-K Financial Statement

#000101816421000013 Filed on March 15, 2021

Income Statement

Concept	2020 Q4	2019 Q4	2019 Q3
Revenue	$61.49M	$89.23M	$120.4M
YoY Change	-31.09%	-24.5%	48.68%
Cost Of Revenue	$3.300M	$15.50M	$20.20M
YoY Change	-78.71%	-49.18%	128.66%
Gross Profit	$58.20M	$73.80M	$100.2M
YoY Change	-21.14%	-17.91%	38.88%
Gross Profit Margin	94.65%	82.71%	83.22%
Selling, General & Admin	$19.80M	$23.60M	$43.45M
YoY Change	-16.1%	0.85%	113.0%
% of Gross Profit	34.02%	31.98%	43.38%
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$23.30M	$23.20M	$22.70M
YoY Change	0.43%	9.43%	14.07%
% of Gross Profit	40.03%	31.44%	22.66%
Operating Expenses	$43.10M	$46.70M	$43.45M
YoY Change	-7.71%	4.71%	7.82%
Operating Profit	$15.10M	$27.10M	$28.91M
YoY Change	-44.28%	-40.18%	126.75%
Interest Expense	-$15.90M	-$11.90M	$16.57M
YoY Change	33.61%	-32.39%	-7.34%
% of Operating Profit	-105.3%	-43.91%	57.32%
Other Income/Expense, Net
YoY Change
Pretax Income	-$7.000M	$8.200M	$31.08M
YoY Change	-185.37%	-62.39%	134.43%
Income Tax	-$4.100M	$3.200M	$7.000M
% Of Pretax Income		39.02%	22.52%
Net Earnings	-$2.900M	$5.000M	$24.07M
YoY Change	-158.0%	-72.38%	148.84%
Net Earnings / Revenue	-4.72%	5.6%	20.0%
Basic Earnings Per Share	-$0.62	$0.71	$3.97
Diluted Earnings Per Share	-$0.62	$0.68	$3.81
COMMON SHARES
Basic Shares Outstanding	5.988M shares	5.850M shares	5.847M shares
Diluted Shares Outstanding	5.988M shares	6.099M shares	6.094M shares

Balance Sheet

Concept	2020 Q4	2019 Q4	2019 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$42.50M	$6.700M	$9.000M
YoY Change	534.33%	-42.74%	7.14%
Cash & Equivalents	$42.54M	$6.720M	$8.976M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory	$59.40M	$41.80M	$42.30M
Prepaid Expenses
Receivables	$28.30M	$24.10M	$33.90M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$130.2M	$72.60M	$85.20M
YoY Change	79.34%	-13.47%	47.92%
LONG-TERM ASSETS
Property, Plant & Equipment	$31.75M	$31.52M	$30.84M
YoY Change	0.74%	13.88%	-98.09%
Goodwill
YoY Change
Intangibles	$1.246M	$1.312M	$1.327M
YoY Change	-5.03%	-4.86%
Long-Term Investments	$53.28M	$57.94M	$53.95M
YoY Change	-8.05%	20.85%	21.51%
Other Assets	$39.20M	$57.10M	$72.30M
YoY Change	-31.35%	-19.69%	-63.19%
Total Long-Term Assets	$2.235B	$1.868B	$1.845B
YoY Change	19.63%	0.92%	-3.27%
TOTAL ASSETS
Total Short-Term Assets	$130.2M	$72.60M	$85.20M
Total Long-Term Assets	$2.235B	$1.868B	$1.845B
Total Assets	$2.365B	$1.941B	$1.930B
YoY Change	21.87%	0.29%	-1.77%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$23.10M	$45.60M	$36.00M
YoY Change	-49.34%	6.29%	-11.98%
Accrued Expenses	$3.900M		$4.000M
YoY Change
Deferred Revenue
YoY Change
Short-Term Debt	$0.00	$0.00	$0.00
YoY Change
Long-Term Debt Due
YoY Change
Total Short-Term Liabilities	$46.50M	$66.20M	$62.20M
YoY Change	-29.76%	-6.63%	-10.5%
LONG-TERM LIABILITIES
Long-Term Debt	$1.694B	$1.251B	$1.259B
YoY Change	35.4%	-6.45%	-9.56%
Other Long-Term Liabilities	$94.10M	$113.0M	$105.5M
YoY Change	-16.73%	13.0%	9.55%
Total Long-Term Liabilities	$1.788B	$1.364B	$1.365B
YoY Change	31.08%	-5.1%	-8.32%
TOTAL LIABILITIES
Total Short-Term Liabilities	$46.50M	$66.20M	$62.20M
Total Long-Term Liabilities	$1.788B	$1.364B	$1.365B
Total Liabilities	$1.951B	$1.541B	$1.535B
YoY Change	26.65%	-3.63%	-6.67%
SHAREHOLDERS EQUITY
Retained Earnings	$355.4M	$349.0M	$344.8M
YoY Change	1.84%	21.75%
Common Stock	$66.00K	$64.00K	$64.00K
YoY Change	3.13%	3.23%
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$364.0M	$350.3M	$345.5M
YoY Change
Total Liabilities & Shareholders Equity	$2.365B	$1.941B	$1.930B
YoY Change	21.87%	0.29%	-1.77%

Cashflow Statement

Concept	2020 Q4	2019 Q4	2019 Q3
OPERATING ACTIVITIES
Net Income	-$2.900M	$5.000M	$24.07M
YoY Change	-158.0%	-72.38%	148.84%
Depreciation, Depletion And Amortization	$23.30M	$23.20M	$22.70M
YoY Change	0.43%	9.43%	14.07%
Cash From Operating Activities	$9.900M	$59.50M	$79.30M
YoY Change	-83.36%	-18.72%	136.72%
INVESTING ACTIVITIES
Capital Expenditures	-$327.5M	-$69.90M	-$78.70M
YoY Change	368.53%	-43.22%	1.03%
Acquisitions
YoY Change
Other Investing Activities	$9.400M	$5.300M	$20.40M
YoY Change	77.36%	-80.59%	129.21%
Cash From Investing Activities	-$318.2M	-$64.60M	-$58.30M
YoY Change	392.57%	-32.57%	-15.51%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	229.3M	-12.00M	-28.30M
YoY Change	-2010.83%	-79.76%	-118.56%
NET CHANGE
Cash From Operating Activities	9.900M	59.50M	79.30M
Cash From Investing Activities	-318.2M	-64.60M	-58.30M
Cash From Financing Activities	229.3M	-12.00M	-28.30M
Net Change In Cash	-79.00M	-17.10M	-7.300M
YoY Change	361.99%	-79.12%	-106.24%
FREE CASH FLOW
Cash From Operating Activities	$9.900M	$59.50M	$79.30M
Capital Expenditures	-$327.5M	-$69.90M	-$78.70M
Free Cash Flow	$337.4M	$129.4M	$158.0M
YoY Change	160.74%	-34.08%	41.83%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
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CY2020	dei	Amendment Flag AmendmentFlag	false
CY2020	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2020
CY2020	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
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CY2020	us-gaap	Longterm Purchase Commitment Period LongtermPurchaseCommitmentPeriod	P3Y
CY2020	dei	Document Type DocumentType	10-K
CY2020	dei	Document Annual Report DocumentAnnualReport	true
CY2020	dei	Document Period End Date DocumentPeriodEndDate	2020-12-31
CY2020	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2020	dei	Document Transition Report DocumentTransitionReport	false
CY2020	dei	Entity File Number EntityFileNumber	001-15369
CY2020	dei	Entity Registrant Name EntityRegistrantName	WILLIS LEASE FINANCE CORP
CY2020	dei	Entity Incorporation State Country Code EntityIncorporationStateCountryCode	DE
CY2020	dei	Entity Tax Identification Number EntityTaxIdentificationNumber	68-0070656
CY2020	dei	Entity Address Address Line1 EntityAddressAddressLine1	4700 Lyons Technology Parkway
CY2020	dei	Entity Address City Or Town EntityAddressCityOrTown	Coconut Creek
CY2020	dei	Entity Address State Or Province EntityAddressStateOrProvince	FL
CY2020	dei	Entity Address Postal Zip Code EntityAddressPostalZipCode	33073
CY2020	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2020	dei	Local Phone Number LocalPhoneNumber	349-9989
CY2020	dei	Security12b Title Security12bTitle	Common Stock, $0.01 par value per share
CY2020	dei	Trading Symbol TradingSymbol	WLFC
CY2020	dei	Security Exchange Name SecurityExchangeName	NASDAQ
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CY2020	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
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CY2020	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
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CY2020	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	7879000	USD
CY2019	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	63572000	USD
CY2018Q4	us-gaap	Stockholders Equity StockholdersEquity	286787000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	66922000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Translation Adjustment Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTranslationAdjustmentTaxPortionAttributableToParent	-50000	USD
CY2019	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	-172000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	-927000	USD
CY2019	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-3178000	USD
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	3567000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	335000	USD
CY2019	us-gaap	Stock Issued During Period Value Share Based Compensation Forfeited StockIssuedDuringPeriodValueShareBasedCompensationForfeited	1475000	USD
CY2019	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	7787000	USD
CY2019	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	84000	USD
CY2019	us-gaap	Preferred Stock Dividends Per Share Cash Paid PreferredStockDividendsPerShareCashPaid	1.30
CY2020	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	1510000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	9748000	USD
CY2019	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3250000	USD
CY2019Q4	us-gaap	Stockholders Equity StockholdersEquity	350338000	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Translation Adjustment Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTranslationAdjustmentTaxPortionAttributableToParent	225000	USD
CY2020	us-gaap	Other Comprehensive Income Foreign Currency Transaction And Translation Adjustment Net Of Tax Portion Attributable To Parent OtherComprehensiveIncomeForeignCurrencyTransactionAndTranslationAdjustmentNetOfTaxPortionAttributableToParent	793000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationTaxParent	-757000	USD
CY2020	us-gaap	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification And Tax Parent OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationAndTaxParent	-2662000	USD
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1510000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation Gross StockIssuedDuringPeriodValueShareBasedCompensationGross	428000	USD
CY2020	us-gaap	Stock Issued During Period Value Share Based Compensation Forfeited StockIssuedDuringPeriodValueShareBasedCompensationForfeited	1155000	USD
CY2020	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	11378000	USD
CY2020	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	84000	USD
CY2020	us-gaap	Preferred Stock Dividends Per Share Cash Paid PreferredStockDividendsPerShareCashPaid	1.30
CY2020	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3259000	USD
CY2020Q4	us-gaap	Stockholders Equity StockholdersEquity	364015000	USD
CY2020	us-gaap	Net Income Loss NetIncomeLoss	9748000	USD
CY2020	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	94541000	USD
CY2019	us-gaap	Net Income Loss NetIncomeLoss	66922000	USD
CY2019	us-gaap	Other Depreciation And Amortization OtherDepreciationAndAmortization	86236000	USD
CY2020	us-gaap	Production Related Impairments Or Charges ProductionRelatedImpairmentsOrCharges	20540000	USD
CY2019	us-gaap	Production Related Impairments Or Charges ProductionRelatedImpairmentsOrCharges	18220000	USD
CY2020	us-gaap	Share Based Compensation ShareBasedCompensation	11378000	USD
CY2019	us-gaap	Share Based Compensation ShareBasedCompensation	7787000	USD
CY2020	us-gaap	Amortization Of Deferred Charges AmortizationOfDeferredCharges	5140000	USD
CY2019	us-gaap	Amortization Of Deferred Charges AmortizationOfDeferredCharges	6364000	USD
CY2020	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	5000	USD
CY2019	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-272000	USD
CY2020	us-gaap	Gain Loss On Sale Of Leased Assets Net Operating Leases GainLossOnSaleOfLeasedAssetsNetOperatingLeases	3391000	USD
CY2019	us-gaap	Gain Loss On Sale Of Leased Assets Net Operating Leases GainLossOnSaleOfLeasedAssetsNetOperatingLeases	20044000	USD
CY2020	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	2642000	USD
CY2019	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	8578000	USD
CY2020	us-gaap	Gain Loss On Sale Of Notes Receivable GainLossOnSaleOfNotesReceivable	-79000	USD
CY2019	us-gaap	Gain Loss On Sale Of Notes Receivable GainLossOnSaleOfNotesReceivable	0	USD
CY2020	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	9000	USD
CY2019	us-gaap	Gain Loss On Disposition Of Assets GainLossOnDispositionOfAssets	-42000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4688000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-220000	USD
CY2020	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-6953000	USD
CY2019	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-21074000	USD
CY2020	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	4215000	USD
CY2019	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	517000	USD
CY2020	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	7200000	USD
CY2019	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	3300000	USD
CY2020	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-7026000	USD
CY2019	us-gaap	Increase Decrease In Inventories IncreaseDecreaseInInventories	-29114000	USD
CY2020	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	16252000	USD
CY2019	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	2519000	USD
CY2020	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-18441000	USD
CY2019	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	2131000	USD
CY2020	wlfc	Increase Decrease In Maintenance Reserves IncreaseDecreaseInMaintenanceReserves	-24386000	USD
CY2019	wlfc	Increase Decrease In Maintenance Reserves IncreaseDecreaseInMaintenanceReserves	22282000	USD
CY2020	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	1166000	USD
CY2020	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	-3352000	USD
CY2019	us-gaap	Increase Decrease In Contract With Customer Liability IncreaseDecreaseInContractWithCustomerLiability	661000	USD
CY2019	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	2108000	USD
CY2020	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	93444000	USD
CY2019	us-gaap	Net Cash Provided By Used In Operating Activities NetCashProvidedByUsedInOperatingActivities	230315000	USD
CY2020	us-gaap	Proceeds From Sale Of Machinery And Equipment ProceedsFromSaleOfMachineryAndEquipment	26078000	USD
CY2019	us-gaap	Proceeds From Sale Of Machinery And Equipment ProceedsFromSaleOfMachineryAndEquipment	191891000	USD
CY2020	us-gaap	Proceeds From Sale Of Notes Receivable ProceedsFromSaleOfNotesReceivable	8431000	USD
CY2019	us-gaap	Proceeds From Sale Of Notes Receivable ProceedsFromSaleOfNotesReceivable	0	USD
CY2020	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	136583000	USD
CY2019	us-gaap	Payments To Acquire Notes Receivable PaymentsToAcquireNotesReceivable	42857000	USD
CY2020	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	7630000	USD
CY2019	us-gaap	Proceeds From Collection Of Notes Receivable ProceedsFromCollectionOfNotesReceivable	4950000	USD
CY2020	us-gaap	Payments To Acquire Interest In Joint Venture PaymentsToAcquireInterestInJointVenture	0	USD
CY2019	us-gaap	Payments To Acquire Interest In Joint Venture PaymentsToAcquireInterestInJointVenture	5713000	USD
CY2020	us-gaap	Payments To Acquire Equipment On Lease PaymentsToAcquireEquipmentOnLease	409250000	USD
CY2019	us-gaap	Payments To Acquire Equipment On Lease PaymentsToAcquireEquipmentOnLease	289385000	USD
CY2020	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	2976000	USD
CY2019	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	6330000	USD
CY2020	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-506670000	USD
CY2019	us-gaap	Net Cash Provided By Used In Investing Activities NetCashProvidedByUsedInInvestingActivities	-147444000	USD
CY2020	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	973200000	USD
CY2019	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	340120000	USD
CY2020	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	6065000	USD
CY2019	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3142000	USD
CY2020	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	530783000	USD
CY2019	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	428081000	USD
CY2020	wlfc	Proceeds From Security Deposit ProceedsFromSecurityDeposit	0	USD
CY2019	wlfc	Proceeds From Security Deposit ProceedsFromSecurityDeposit	2092000	USD
CY2020	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	2373000	USD
CY2019	us-gaap	Payments Of Debt Extinguishment Costs PaymentsOfDebtExtinguishmentCosts	0	USD
CY2020	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	428000	USD
CY2019	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	335000	USD
CY2019	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	3567000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P4Y2M12D
CY2019Q4	us-gaap	Operating Lease Weighted Average Remaining Lease Term1 OperatingLeaseWeightedAverageRemainingLeaseTerm1	P5Y2M1D
CY2020	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	3259000	USD
CY2019	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	3250000	USD
CY2020	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1155000	USD
CY2019	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1475000	USD
CY2020	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	428483000	USD
CY2019	us-gaap	Net Cash Provided By Used In Financing Activities NetCashProvidedByUsedInFinancingActivities	-101152000	USD
CY2020	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	15257000	USD
CY2019	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents Period Increase Decrease Including Exchange Rate Effect CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalentsPeriodIncreaseDecreaseIncludingExchangeRateEffect	-18281000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	63668000	USD
CY2018Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	81949000	USD
CY2020Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	78925000	USD
CY2019Q4	us-gaap	Cash Cash Equivalents Restricted Cash And Restricted Cash Equivalents CashCashEquivalentsRestrictedCashAndRestrictedCashEquivalents	63668000	USD
CY2020	us-gaap	Interest Paid Net InterestPaidNet	54339000	USD
CY2019	us-gaap	Interest Paid Net InterestPaidNet	63585000	USD
CY2020	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	510000	USD
CY2019	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	222000	USD
CY2020	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	8868000	USD
CY2019	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	2515000	USD
CY2020	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	2800000	USD
CY2019	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	10131000	USD
CY2020	wlfc	Equipment Held For Sale Transfer To Spare Parts Inventory EquipmentHeldForSaleTransferToSparePartsInventory	24702000	USD
CY2019	wlfc	Equipment Held For Sale Transfer To Spare Parts Inventory EquipmentHeldForSaleTransferToSparePartsInventory	23931000	USD
CY2020	wlfc	Transfers From Equipment Held For Operating Lease To Spare Parts Inventory TransfersFromEquipmentHeldForOperatingLeaseToSparePartsInventory	0	USD
CY2019	wlfc	Transfers From Equipment Held For Operating Lease To Spare Parts Inventory TransfersFromEquipmentHeldForOperatingLeaseToSparePartsInventory	422000	USD
CY2020	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	84000	USD
CY2019	us-gaap	Temporary Equity Accretion To Redemption Value Adjustment TemporaryEquityAccretionToRedemptionValueAdjustment	84000	USD
CY2020Q4	wlfc	Lease Rent Receivable Past Due LeaseRentReceivablePastDue	4600000	USD
CY2020Q4	wlfc	Maintenance Reserve Receivable Past Due MaintenanceReserveReceivablePastDue	1900000	USD
CY2020	wlfc	Lease Rent And Maintenance Reserve Payments Receivable Past Due Period Minimum LeaseRentAndMaintenanceReservePaymentsReceivablePastDuePeriodMinimum	P30D
CY2020Q4	us-gaap	Unbilled Receivables Current UnbilledReceivablesCurrent	800000	USD
CY2020	us-gaap	Derivatives Methods Of Accounting Hedging Derivatives DerivativesMethodsOfAccountingHedgingDerivatives	Interest Rate Hedging<div style="margin-top:10pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company enters into various derivative instruments periodically to mitigate the exposure on variable rate borrowings. The derivative instruments are fixed-rate interest swaps that are recorded at fair value as either an asset or liability.</span></div><div style="margin-top:10pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">While substantially all of the Company’s derivative transactions are entered into for the purposes described above, hedge accounting is only applied where specific criteria have been met and it is practicable to do so. In order to apply hedge accounting, the transaction must be designated as a hedge and it must be highly effective. The hedging instrument’s effectiveness is assessed utilizing regression analysis at the inception of the hedge and on at least a quarterly basis throughout its life. All of the transactions that the Company has designated as hedges are cash flow hedges. The effective portion of the change in fair value on a derivative instrument designated as a cash flow hedge is reported as a component of other comprehensive income and is reclassified into earnings in the period during which the transaction being hedged affects earnings. The ineffective portion of the hedges is recorded in earnings in the current period.</span></div>
CY2020Q4	wlfc	Prepaid Deposits PrepaidDeposits	10500000	USD
CY2019Q4	wlfc	Prepaid Deposits PrepaidDeposits	10600000	USD
CY2020	us-gaap	Use Of Estimates UseOfEstimates	Management EstimatesThese financial statements have been prepared on the accrual basis of accounting in accordance with accounting principles generally accepted in the United States.<div style="margin-top:10pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The preparation of consolidated financial statements requires management to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. Management evaluates estimates on an ongoing basis, including those related to residual values, estimated asset lives, impairments and bad debts. Estimates are based on historical experience and on various other assumptions that are believed to be reasonable under the circumstances for making judgments about the carrying values of assets and liabilities that are not readily apparent from other sources. Actual results may differ from these estimates under different assumptions or conditions.</span></div><div style="margin-top:10pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Management believes that the accounting policies on revenue recognition, maintenance reserves and expenditures, useful life of equipment, asset residual values, asset impairment and allowance for doubtful accounts are critical to the results of operations.</span></div><div style="margin-top:10pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">If the useful lives or residual values are lower than those estimated, upon sale of the asset a loss may be realized. Significant management judgment is required in the forecasting of future operating results, which are used in the preparation of projected undiscounted cash-flows and should different conditions prevail, material impairment write-downs may occur.</span></div>
CY2020Q4	us-gaap	Equity Method Investment Ownership Percentage EquityMethodInvestmentOwnershipPercentage	0.50
CY2020Q4	us-gaap	Business Combination Step Acquisition Equity Interest In Acquiree Percentage BusinessCombinationStepAcquisitionEquityInterestInAcquireePercentage	0.50
CY2020	wlfc	Amortization Of Lease Acquisition Costs AmortizationOfLeaseAcquisitionCosts	1500000	USD
CY2019	wlfc	Amortization Of Lease Acquisition Costs AmortizationOfLeaseAcquisitionCosts	2000000.0	USD
CY2020	us-gaap	Concentration Risk Credit Risk ConcentrationRiskCreditRisk	Risk Concentrations<div style="margin-top:10pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">Financial instruments which potentially subject us to concentrations of credit risk consist principally of cash deposits, lease receivables and interest rate swaps.</span></div><div style="margin-top:10pt;text-align:justify;text-indent:18pt"><span style="color:#000000;font-family:'Times New Roman',sans-serif;font-size:10pt;font-weight:400;line-height:120%">The Company places its cash deposits with financial institutions and other credit-worthy institutions, such as money market funds, and limits the amount of credit exposure to any one party. Management opts for security of principal as opposed to yield. Concentrations of credit risk with respect to lease receivables are limited due to the large number of customers comprising the customer base, and their dispersion across different geographic areas. Some lessees are required to make payments for maintenance reserves at the end of the lease however, this risk is considered limited due to the relatively few lessees which have this provision in the lease. The Company enters into interest rate swap agreements with counterparties that are investment grade financial institutions.</span></div>
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3784000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	4084000	USD
CY2020Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	3784000	USD
CY2019Q4	us-gaap	Operating Lease Right Of Use Asset OperatingLeaseRightOfUseAsset	4084000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	3873000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	3835000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	3873000	USD
CY2019Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	3835000	USD
CY2020Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.031
CY2019Q4	us-gaap	Operating Lease Weighted Average Discount Rate Percent OperatingLeaseWeightedAverageDiscountRatePercent	0.045
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Next Twelve Months LesseeOperatingLeaseLiabilityPaymentsDueNextTwelveMonths	1189000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Two LesseeOperatingLeaseLiabilityPaymentsDueYearTwo	1033000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Three LesseeOperatingLeaseLiabilityPaymentsDueYearThree	708000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Four LesseeOperatingLeaseLiabilityPaymentsDueYearFour	394000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due Year Five LesseeOperatingLeaseLiabilityPaymentsDueYearFive	394000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due After Year Five LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFive	591000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Payments Due LesseeOperatingLeaseLiabilityPaymentsDue	4309000	USD
CY2020Q4	us-gaap	Lessee Operating Lease Liability Undiscounted Excess Amount LesseeOperatingLeaseLiabilityUndiscountedExcessAmount	436000	USD
CY2020Q4	us-gaap	Operating Lease Liability OperatingLeaseLiability	3873000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due Current OperatingLeasesFutureMinimumPaymentsDueCurrent	1227000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due In Two Years OperatingLeasesFutureMinimumPaymentsDueInTwoYears	1055000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due In Three Years OperatingLeasesFutureMinimumPaymentsDueInThreeYears	688000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due In Four Years OperatingLeasesFutureMinimumPaymentsDueInFourYears	394000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due In Five Years OperatingLeasesFutureMinimumPaymentsDueInFiveYears	394000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due Thereafter OperatingLeasesFutureMinimumPaymentsDueThereafter	592000	USD
CY2020Q4	us-gaap	Operating Leases Future Minimum Payments Due OperatingLeasesFutureMinimumPaymentsDue	4350000	USD
CY2020	us-gaap	Operating Lease Cost OperatingLeaseCost	1141000	USD
CY2019	us-gaap	Operating Lease Cost OperatingLeaseCost	1326000	USD
CY2020	us-gaap	Lease Cost LeaseCost	1141000	USD
CY2019	us-gaap	Lease Cost LeaseCost	1326000	USD
CY2020	us-gaap	Operating Lease Payments OperatingLeasePayments	1083000	USD
CY2019	us-gaap	Operating Lease Payments OperatingLeasePayments	920000	USD
CY2020	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	705000	USD
CY2019	us-gaap	Right Of Use Asset Obtained In Exchange For Operating Lease Liability RightOfUseAssetObtainedInExchangeForOperatingLeaseLiability	495000	USD
CY2020	us-gaap	Gain Loss On Sale Of Leased Assets Net Operating Leases GainLossOnSaleOfLeasedAssetsNetOperatingLeases	3391000	USD
CY2020	us-gaap	Revenues Revenues	288692000	USD
CY2019	us-gaap	Gain Loss On Sale Of Leased Assets Net Operating Leases GainLossOnSaleOfLeasedAssetsNetOperatingLeases	20044000	USD
CY2019	us-gaap	Revenues Revenues	409160000	USD
CY2020Q4	us-gaap	Net Investment In Lease NetInvestmentInLease	1886600000	USD
CY2020Q4	wlfc	Net Investment In Lease Notes Receivable NetInvestmentInLeaseNotesReceivable	158700000	USD
CY2020Q4	wlfc	Number Of Leased Assets NumberOfLeasedAssets	291	engine
CY2020Q4	wlfc	Number Of Leased Assets NumberOfLeasedAssets	8	aircraft.
CY2020Q4	wlfc	Number Of Leased Assets NumberOfLeasedAssets	1	vessel
CY2019Q4	us-gaap	Net Investment In Lease NetInvestmentInLease	1650900000	USD
CY2019Q4	wlfc	Net Investment In Lease Notes Receivable NetInvestmentInLeaseNotesReceivable	38100000	USD
CY2019Q4	wlfc	Number Of Leased Assets NumberOfLeasedAssets	263	engine
CY2019Q4	wlfc	Number Of Leased Assets NumberOfLeasedAssets	12	aircraft.
CY2019Q4	wlfc	Number Of Leased Assets NumberOfLeasedAssets	1	marineVessel
CY2020	wlfc	Number Of Geographic Regions In Which Aircraft Lessees Are Domiciled In NumberOfGeographicRegionsInWhichAircraftLesseesAreDomiciledIn	8	regions
CY2020	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	142895000	USD
CY2019	us-gaap	Operating Lease Lease Income OperatingLeaseLeaseIncome	190690000	USD
CY2020Q4	us-gaap	Net Investment In Lease NetInvestmentInLease	1886613000	USD
CY2019Q4	us-gaap	Net Investment In Lease NetInvestmentInLease	1650918000	USD
CY2020Q4	us-gaap	Net Investment In Lease NetInvestmentInLease	1886613000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Next Twelve Months LessorOperatingLeasePaymentsToBeReceivedNextTwelveMonths	120393000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Two Years LessorOperatingLeasePaymentsToBeReceivedTwoYears	75835000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Three Years LessorOperatingLeasePaymentsToBeReceivedThreeYears	28452000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Four Years LessorOperatingLeasePaymentsToBeReceivedFourYears	15091000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Five Years LessorOperatingLeasePaymentsToBeReceivedFiveYears	5647000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received Thereafter LessorOperatingLeasePaymentsToBeReceivedThereafter	8002000	USD
CY2020Q4	us-gaap	Lessor Operating Lease Payments To Be Received LessorOperatingLeasePaymentsToBeReceived	253420000	USD
CY2018Q4	us-gaap	Equity Method Investments EquityMethodInvestments	47941000	USD
CY2019	wlfc	Income Loss From Equity Method Investments Excluding Amortization On Deferred Gains IncomeLossFromEquityMethodInvestmentsExcludingAmortizationOnDeferredGains	8578000	USD
CY2019	us-gaap	Payments To Acquire Interest In Joint Venture PaymentsToAcquireInterestInJointVenture	5713000	USD
CY2019	us-gaap	Proceeds From Divestiture Of Interest In Joint Venture ProceedsFromDivestitureOfInterestInJointVenture	3300000	USD
CY2019	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	-222000	USD
CY2019	wlfc	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Joint Venture OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxJointVenture	-774000	USD
CY2019Q4	us-gaap	Equity Method Investments EquityMethodInvestments	57936000	USD
CY2020	wlfc	Income Loss From Equity Method Investments Excluding Amortization On Deferred Gains IncomeLossFromEquityMethodInvestmentsExcludingAmortizationOnDeferredGains	2642000	USD
CY2020	us-gaap	Payments To Acquire Interest In Joint Venture PaymentsToAcquireInterestInJointVenture	0	USD
CY2020	us-gaap	Proceeds From Divestiture Of Interest In Joint Venture ProceedsFromDivestitureOfInterestInJointVenture	7200000	USD
CY2020	us-gaap	Foreign Currency Transaction Gain Loss Before Tax ForeignCurrencyTransactionGainLossBeforeTax	1018000	USD
CY2020	wlfc	Other Comprehensive Income Loss Cash Flow Hedge Gain Loss After Reclassification Before Tax Joint Venture OtherComprehensiveIncomeLossCashFlowHedgeGainLossAfterReclassificationBeforeTaxJointVenture	-1121000	USD
CY2020Q4	us-gaap	Equity Method Investments EquityMethodInvestments	53275000	USD
CY2020Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1712886000	USD
CY2019Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1270469000	USD
CY2020Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	19133000	USD
CY2019Q4	us-gaap	Deferred Finance Costs Net DeferredFinanceCostsNet	19463000	USD
CY2020Q4	us-gaap	Long Term Debt LongTermDebt	1693753000	USD
CY2019Q4	us-gaap	Long Term Debt LongTermDebt	1251006000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	51497000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	57341000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	52469000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	828636000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	50401000	USD
CY2020Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	672542000	USD
CY2020Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	1712886000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	16990000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Domestic IncomeLossFromContinuingOperationsBeforeIncomeTaxesDomestic	88182000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	346000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Foreign IncomeLossFromContinuingOperationsBeforeIncomeTaxesForeign	699000	USD
CY2020	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	17336000	USD
CY2019	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	88881000	USD
CY2020	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2020	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-88000	USD
CY2020	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	723000	USD
CY2020	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	635000	USD
CY2020	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	6251000	USD
CY2020	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	702000	USD
CY2020	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	USD
CY2020	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	6953000	USD
CY2020	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	6251000	USD
CY2020	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	614000	USD
CY2020	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	723000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7588000	USD
CY2019	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	0	USD
CY2019	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	722000	USD
CY2019	us-gaap	Current Foreign Tax Expense Benefit CurrentForeignTaxExpenseBenefit	163000	USD
CY2019	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	885000	USD
CY2019	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	20205000	USD
CY2019	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	869000	USD
CY2019	us-gaap	Deferred Foreign Income Tax Expense Benefit DeferredForeignIncomeTaxExpenseBenefit	0	USD
CY2019	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	21074000	USD
CY2019	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	20205000	USD
CY2019	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	1591000	USD
CY2019	us-gaap	Foreign Income Tax Expense Benefit Continuing Operations ForeignIncomeTaxExpenseBenefitContinuingOperations	163000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	21959000	USD
CY2020	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	3640000	USD
CY2019	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	18665000	USD
CY2020	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	633000	USD
CY2019	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	1440000	USD
CY2020	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	0	USD
CY2019	us-gaap	Income Tax Reconciliation Foreign Income Tax Rate Differential IncomeTaxReconciliationForeignIncomeTaxRateDifferential	0	USD
CY2020	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	508000	USD
CY2019	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	475000	USD
CY2020	wlfc	Income Tax Reconciliation Permanent Differences Relating To Irs Section162m IncomeTaxReconciliationPermanentDifferencesRelatingToIRSSection162m	2748000	USD
CY2019	wlfc	Income Tax Reconciliation Permanent Differences Relating To Irs Section162m IncomeTaxReconciliationPermanentDifferencesRelatingToIRSSection162m	2083000	USD
CY2020	wlfc	Income Tax Reconciliation Nondeductible Expense Permanent Differences And Other Adjustments IncomeTaxReconciliationNondeductibleExpensePermanentDifferencesAndOtherAdjustments	59000	USD
CY2019	wlfc	Income Tax Reconciliation Nondeductible Expense Permanent Differences And Other Adjustments IncomeTaxReconciliationNondeductibleExpensePermanentDifferencesAndOtherAdjustments	-704000	USD
CY2020	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7588000	USD
CY2019	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	21959000	USD
CY2018Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	182000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	250000	USD
CY2019	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	162000	USD
CY2019Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	270000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	66000	USD
CY2020	us-gaap	Unrecognized Tax Benefits Reductions Resulting From Lapse Of Applicable Statute Of Limitations UnrecognizedTaxBenefitsReductionsResultingFromLapseOfApplicableStatuteOfLimitations	6000	USD
CY2020Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	330000	USD
CY2020Q4	wlfc	Uncertain Tax Positions Reserved For Foreign Exposure UncertainTaxPositionsReservedForForeignExposure	300000	USD
CY2019Q4	wlfc	Uncertain Tax Positions Reserved For Foreign Exposure UncertainTaxPositionsReservedForForeignExposure	200000	USD
CY2020Q4	wlfc	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Lease Revenue DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedLeaseRevenue	2519000	USD
CY2019Q4	wlfc	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Lease Revenue DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedLeaseRevenue	1277000	USD
CY2020Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	10000	USD
CY2019Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	152000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	2153000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Inventory DeferredTaxAssetsInventory	0	USD
CY2020Q4	wlfc	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Reserves And Allowances DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReservesAndAllowances	4356000	USD
CY2019Q4	wlfc	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Reserves And Allowances DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReservesAndAllowances	1988000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	1769000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	4974000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	0	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Foreign DeferredTaxAssetsTaxCreditCarryforwardsForeign	19000	USD
CY2020Q4	wlfc	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	198000	USD
CY2019Q4	wlfc	Deferred Tax Assets Lease Liabilities DeferredTaxAssetsLeaseLiabilities	271000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	74045000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	12091000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	33000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	0	USD
CY2020Q4	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	65000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	57000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	85148000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	20829000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	468000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Valuation Allowance DeferredTaxAssetsValuationAllowance	153000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	84680000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Net DeferredTaxAssetsNet	20676000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	163773000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	118595000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Inventory Costs DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts	0	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Deferred Expense Capitalized Inventory Costs DeferredTaxLiabilitiesDeferredExpenseCapitalizedInventoryCosts	2350000	USD
CY2020Q4	wlfc	Deferred Tax Liabilities Notes Receivable DeferredTaxLiabilitiesNotesReceivable	34426000	USD
CY2019Q4	wlfc	Deferred Tax Liabilities Notes Receivable DeferredTaxLiabilitiesNotesReceivable	6640000	USD
CY2019Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	132043000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	184000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Leasing Arrangements DeferredTaxLiabilitiesLeasingArrangements	260000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	4616000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	4198000	USD
CY2020Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	202999000	USD
CY2020Q4	us-gaap	Deferred Tax Assets Other Comprehensive Loss DeferredTaxAssetsOtherComprehensiveLoss	1481000	USD
CY2019Q4	us-gaap	Deferred Tax Assets Other Comprehensive Loss DeferredTaxAssetsOtherComprehensiveLoss	949000	USD
CY2020Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	116838000	USD
CY2019Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	110418000	USD
CY2020Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	159200000	USD
CY2019Q4	us-gaap	Notes Receivable Fair Value Disclosure NotesReceivableFairValueDisclosure	39700000	USD
CY2020Q4	us-gaap	Notes Payable Fair Value Disclosure NotesPayableFairValueDisclosure	1691000000.0	USD
CY2019Q4	us-gaap	Notes Payable Fair Value Disclosure NotesPayableFairValueDisclosure	1262600000	USD
CY2019	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2020	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	0	shares
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	6405000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	63588000	USD
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5963000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5836000	shares
CY2020	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	165000	shares
CY2019	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	222000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6128000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6058000	shares
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.07
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	10.90
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.05
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	10.50
CY2020	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	800000	USD
CY2020Q4	us-gaap	Purchase Obligation PurchaseObligation	471000000.0	USD
CY2020Q4	us-gaap	Stock Repurchase Program Authorized Amount1 StockRepurchaseProgramAuthorizedAmount1	60000000.0	USD
CY2020	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	1500000	USD
CY2020	wlfc	Stock Repurchased Average Cost Per Share StockRepurchasedAverageCostPerShare	27.24
CY2019	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	3600000	USD
CY2019	wlfc	Stock Repurchased Average Cost Per Share StockRepurchasedAverageCostPerShare	49.29
CY2020Q4	us-gaap	Stock Repurchase Program Remaining Authorized Repurchase Amount1 StockRepurchaseProgramRemainingAuthorizedRepurchaseAmount1	54900000	USD
CY2020	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.065
CY2020Q4	us-gaap	Temporary Equity Liquidation Preference Per Share TemporaryEquityLiquidationPreferencePerShare	20.00
CY2020Q4	us-gaap	Temporary Equity Redemption Price Per Share TemporaryEquityRedemptionPricePerShare	20.00
CY2019	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	500000	USD
CY2020	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	11378000	USD
CY2019	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	7787000	USD
CY2020	wlfc	Defined Contribution Plan Maximum Percentage Of Pre Tax Salary That Could Be Deferred By Participants DefinedContributionPlanMaximumPercentageOfPreTaxSalaryThatCouldBeDeferredByParticipants	0.75
CY2020	wlfc	Defined Contribution Plan Maximum Amount Of Pre Tax Salary That Could Be Deferred By Participants DefinedContributionPlanMaximumAmountOfPreTaxSalaryThatCouldBeDeferredByParticipants	19500	USD
CY2020	wlfc	Defined Contribution Plan Maximum Amount Of Wages To Be Deferred By Participants With50 Years Of Age DefinedContributionPlanMaximumAmountOfWagesToBeDeferredByParticipantsWith50YearsOfAge	26000	USD
CY2020	wlfc	Defined Contribution Plan Minimum Age Of Employees For Specified Contribution Amount DefinedContributionPlanMinimumAgeOfEmployeesForSpecifiedContributionAmount	P50Y
CY2020	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.50
CY2020	us-gaap	Defined Contribution Plan Maximum Annual Contributions Per Employee Amount DefinedContributionPlanMaximumAnnualContributionsPerEmployeeAmount	13000000	USD
CY2020Q1	us-gaap	Revenues Revenues	81609000	USD
CY2020Q2	us-gaap	Revenues Revenues	74983000	USD
CY2020Q3	us-gaap	Revenues Revenues	70613000	USD
CY2020Q4	us-gaap	Revenues Revenues	61487000	USD
CY2020	us-gaap	Revenues Revenues	288692000	USD
CY2020Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	3455000	USD
CY2020Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4540000	USD
CY2020Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2144000	USD
CY2020Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-3734000	USD
CY2020	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	6405000	USD
CY2020Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.59
CY2020Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.75
CY2020Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.36
CY2020Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.62
CY2020	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.07
CY2020Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.56
CY2020Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.74
CY2020Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.35
CY2020Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.62
CY2020	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.05
CY2020Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5860000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	6016000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5985000	shares
CY2020Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5988000	shares
CY2020	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5963000	shares
CY2020Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6124000	shares
CY2020Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6103000	shares
CY2020Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6084000	shares
CY2020Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	5988000	shares
CY2020	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6128000	shares
CY2019Q1	us-gaap	Revenues Revenues	103769000	USD
CY2019Q2	us-gaap	Revenues Revenues	95797000	USD
CY2019Q3	us-gaap	Revenues Revenues	120366000	USD
CY2019Q4	us-gaap	Revenues Revenues	89228000	USD
CY2019	us-gaap	Revenues Revenues	409160000	USD
CY2019Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	20056000	USD
CY2019Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	16144000	USD
CY2019Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	23232000	USD
CY2019Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4156000	USD
CY2019	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	63588000	USD
CY2019Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.47
CY2019Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	2.75
CY2019Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	3.97
CY2019Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.71
CY2019	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	10.90
CY2019Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.35
CY2019Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	2.66
CY2019Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	3.81
CY2019Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.68
CY2019	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	10.50
CY2019Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5779000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5866000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5847000	shares
CY2019Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5850000	shares
CY2019	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	5836000	shares
CY2019Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	5978000	shares
CY2019Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6061000	shares
CY2019Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6094000	shares
CY2019Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6099000	shares
CY2019	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	6058000	shares
CY2019	wlfc	Related Party Transaction Proceeds From Sale Of Assets RelatedPartyTransactionProceedsFromSaleOfAssets	2600000	USD
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment.
CY2020	us-gaap	Number Of Operating Segments NumberOfOperatingSegments	2	segment.
CY2020	us-gaap	Gain Loss On Sale Of Leased Assets Net Operating Leases GainLossOnSaleOfLeasedAssetsNetOperatingLeases	3391000	USD
CY2020	us-gaap	Revenues Revenues	288692000	USD
CY2020	us-gaap	Depreciation And Amortization DepreciationAndAmortization	94541000	USD
CY2020	us-gaap	Selling Expense SellingExpense	16762000	USD
CY2020	us-gaap	Production Related Impairments Or Charges ProductionRelatedImpairmentsOrCharges	20540000	USD
CY2020	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	67910000	USD
CY2020	us-gaap	Equipment Expense EquipmentExpense	6533000	USD
CY2020	us-gaap	Interest Expense InterestExpense	63024000	USD
CY2020	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-4688000	USD
CY2020	wlfc	Finance Costs Net FinanceCostsNet	67712000	USD
CY2020	us-gaap	Costs And Expenses CostsAndExpenses	273998000	USD
CY2020	us-gaap	Operating Income Loss OperatingIncomeLoss	14694000	USD
CY2019	us-gaap	Gain Loss On Sale Of Leased Assets Net Operating Leases GainLossOnSaleOfLeasedAssetsNetOperatingLeases	20044000	USD
CY2019	us-gaap	Revenues Revenues	409160000	USD
CY2019	us-gaap	Depreciation And Amortization DepreciationAndAmortization	86236000	USD
CY2019	us-gaap	Selling Expense SellingExpense	62647000	USD
CY2019	us-gaap	Production Related Impairments Or Charges ProductionRelatedImpairmentsOrCharges	18220000	USD
CY2019	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	86523000	USD
CY2019	us-gaap	Equipment Expense EquipmentExpense	8122000	USD
CY2019	us-gaap	Interest Expense InterestExpense	66889000	USD
CY2019	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-220000	USD
CY2019	wlfc	Finance Costs Net FinanceCostsNet	67109000	USD
CY2019	us-gaap	Costs And Expenses CostsAndExpenses	328857000	USD
CY2019	us-gaap	Operating Income Loss OperatingIncomeLoss	80303000	USD
CY2020Q4	us-gaap	Assets Assets	2364948000	USD
CY2019Q4	us-gaap	Assets Assets	1940608000	USD

Files In Submission

Name	View Source	Status
0001018164-21-000013-index-headers.html	Edgar Link	pending
0001018164-21-000013-index.html	Edgar Link	pending
0001018164-21-000013.txt	Edgar Link	pending
0001018164-21-000013-xbrl.zip	Edgar Link	pending
ex1054-usedenginessaleagre.htm	Edgar Link	pending
ex1055-usedenginessaleagre.htm	Edgar Link	pending
ex1056-fixedpricerepairagr.htm	Edgar Link	pending
ex1057-fixedpricerepairagr.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xlsx	Edgar Link	pending
MetaLinks.json	Edgar Link	pending
R1.htm	Edgar Link	pending
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report.css	Edgar Link	pending
Show.js	Edgar Link	pending
wlfc-20201231.htm	Edgar Link	pending
wlfc-20201231.xsd	Edgar Link	pending
wlfc-20201231xex211xlistof.htm	Edgar Link	pending
wlfc-20201231xex231xconsent.htm	Edgar Link	pending
wlfc-20201231xex311.htm	Edgar Link	pending
wlfc-20201231xex312.htm	Edgar Link	pending
wlfc-20201231xex32.htm	Edgar Link	pending
wlfc-20201231_cal.xml	Edgar Link	unprocessable
wlfc-20201231_def.xml	Edgar Link	unprocessable
wlfc-20201231_htm.xml	Edgar Link	completed
wlfc-20201231_lab.xml	Edgar Link	unprocessable
wlfc-20201231_pre.xml	Edgar Link	unprocessable

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$WLFC
WILLIS LEASE FINANCE CORP Stock $wlfc

2020 Q4 Form 10-K Financial Statement

#000101816421000013 Filed on March 15, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WLFC WILLIS LEASE FINANCE CORP Stock $wlfc

2020 Q4 Form 10-K Financial Statement

#000101816421000013 Filed on March 15, 2021

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WLFC
WILLIS LEASE FINANCE CORP Stock $wlfc