$WLFC
WILLIS LEASE FINANCE CORP Stock $wlfc

$wlfc Overview Financials Valuation SEC Filings Company Website

2011 Q4 Form 10-K Financial Statement

#000110465913021812 Filed on March 18, 2013

Income Statement

Concept	2011 Q4	2010 Q4	2010 Q3
Revenue	$37.67M	$39.63M	$40.19M
YoY Change	-4.96%	2.15%	-7.82%
Cost Of Revenue
YoY Change
Gross Profit
YoY Change
Gross Profit Margin
Selling, General & Admin	$12.30M	$10.70M	$9.300M
YoY Change	14.95%	15.05%	-3.13%
% of Gross Profit
Research & Development
YoY Change
% of Gross Profit
Depreciation & Amortization	$12.60M	$12.60M	$13.00M
YoY Change	0.0%	6.78%	8.33%
% of Gross Profit
Operating Expenses	$24.80M	$23.30M	$22.30M
YoY Change	6.44%	10.43%	3.24%
Operating Profit
YoY Change
Interest Expense	-$7.800M	-$9.300M	-$10.00M
YoY Change	-16.13%	-1.06%	12.36%
% of Operating Profit
Other Income/Expense, Net
YoY Change
Pretax Income	$3.700M	$6.800M	$5.200M
YoY Change	-45.59%	30.77%	-52.73%
Income Tax	$0.00	$2.800M	$2.100M
% Of Pretax Income	0.0%	41.18%	40.38%
Net Earnings	$3.648M	$4.010M	$3.083M
YoY Change	-9.03%	301.0%	-66.85%
Net Earnings / Revenue	9.68%	10.12%	7.67%
Basic Earnings Per Share	$0.34	$0.37	$0.27
Diluted Earnings Per Share	$0.33	$0.35	$0.25
COMMON SHARES
Basic Shares Outstanding	8.425M shares	8.654M shares	8.683M shares
Diluted Shares Outstanding	8.758M shares	9.199M shares	9.080M shares

Balance Sheet

Concept	2011 Q4	2010 Q4	2010 Q3
SHORT-TERM ASSETS
Cash & Short-Term Investments	$6.400M	$2.200M	$2.000M
YoY Change	190.91%	4.76%	-94.46%
Cash & Equivalents	$6.440M	$2.225M	$2.000M
Short-Term Investments
Other Short-Term Assets
YoY Change
Inventory
Prepaid Expenses
Receivables	$8.400M	$8.900M	$5.400M
Other Receivables	$0.00	$0.00	$0.00
Total Short-Term Assets	$14.80M	$11.10M	$7.400M
YoY Change	33.33%	40.51%	-83.37%
LONG-TERM ASSETS
Property, Plant & Equipment	$6.901M	$1.005B	$947.8M
YoY Change	-99.31%	2.12%	2.1%
Goodwill
YoY Change
Intangibles
YoY Change
Long-Term Investments	$15.24M	$9.381M	$10.80M
YoY Change	62.45%	-12.33%	2.86%
Other Assets	$96.90M	$84.40M	$103.6M
YoY Change	14.81%	14.21%	17.33%
Total Long-Term Assets	$1.118B	$1.115B	$1.078B
YoY Change	0.31%	2.3%	2.83%
TOTAL ASSETS
Total Short-Term Assets	$14.80M	$11.10M	$7.400M
Total Long-Term Assets	$1.118B	$1.115B	$1.078B
Total Assets	$1.133B	$1.126B	$1.085B
YoY Change	0.64%	2.58%	-0.68%
SHORT-TERM LIABILITIES
YoY Change
Accounts Payable	$16.80M	$18.10M	$11.40M
YoY Change	-7.18%	25.69%	-46.98%
Accrued Expenses
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	$23.10M	$23.80M	$16.80M
YoY Change	-2.94%	19.6%	-36.84%
LONG-TERM LIABILITIES
Long-Term Debt	$718.1M	$731.6M	$705.3M
YoY Change	-1.85%	0.74%	-1.16%
Other Long-Term Liabilities	$70.60M	$67.90M	$72.50M
YoY Change	3.98%	10.05%	-0.14%
Total Long-Term Liabilities	$788.7M	$799.5M	$777.8M
YoY Change	-1.35%	1.47%	-1.07%
TOTAL LIABILITIES
Total Short-Term Liabilities	$23.10M	$23.80M	$16.80M
Total Long-Term Liabilities	$788.7M	$799.5M	$777.8M
Total Liabilities	$896.5M	$899.0M	$864.5M
YoY Change	-0.27%	2.52%	-1.28%
SHAREHOLDERS EQUITY
Retained Earnings	$156.7M
YoY Change
Common Stock	$91.00K
YoY Change
Preferred Stock
YoY Change
Treasury Stock (at cost)
YoY Change
Treasury Stock Shares
Shareholders Equity	$236.3M	$226.6M	$221.0M
YoY Change
Total Liabilities & Shareholders Equity	$1.133B	$1.126B	$1.085B
YoY Change	0.64%	2.58%	-0.68%

Cashflow Statement

Concept	2011 Q4	2010 Q4	2010 Q3
OPERATING ACTIVITIES
Net Income	$3.648M	$4.010M	$3.083M
YoY Change	-9.03%	301.0%	-66.85%
Depreciation, Depletion And Amortization	$12.60M	$12.60M	$13.00M
YoY Change	0.0%	6.78%	8.33%
Cash From Operating Activities	$20.40M	$39.10M	-$7.700M
YoY Change	-47.83%	123.43%	-129.73%
INVESTING ACTIVITIES
Capital Expenditures	-$51.60M	-$66.30M	-$6.000M
YoY Change	-22.17%	4.74%	-87.37%
Acquisitions
YoY Change
Other Investing Activities	$2.600M	$4.500M	$27.20M
YoY Change	-42.22%	-2.17%	58.14%
Cash From Investing Activities	-$49.10M	-$61.80M	$21.20M
YoY Change	-20.55%	5.28%	-169.97%
FINANCING ACTIVITIES
Cash Dividend Paid
YoY Change
Common Stock Issuance & Retirement, Net
YoY Change
Debt Paid & Issued, Net
YoY Change
Cash From Financing Activities	29.10M	23.00M	-13.20M
YoY Change	26.52%	219.44%	-1042.86%
NET CHANGE
Cash From Operating Activities	20.40M	39.10M	-7.700M
Cash From Investing Activities	-49.10M	-61.80M	21.20M
Cash From Financing Activities	29.10M	23.00M	-13.20M
Net Change In Cash	400.0K	300.0K	300.0K
YoY Change	33.33%	-100.88%	-110.0%
FREE CASH FLOW
Cash From Operating Activities	$20.40M	$39.10M	-$7.700M
Capital Expenditures	-$51.60M	-$66.30M	-$6.000M
Free Cash Flow	$72.00M	$105.4M	-$1.700M
YoY Change	-31.69%	30.45%	-102.32%

Facts In Submission

Frame	Concept Type	Concept / XBRL Key	Value	Unit
CY2011Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	6440000	USD
CY2011Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	76252000	USD
CY2011Q4	us-gaap	Property Subject To Or Available For Operating Lease Net PropertySubjectToOrAvailableForOperatingLeaseNet	981505000	USD
CY2011Q4	wlfc	Equipment Held For Sale EquipmentHeldForSale	20648000	USD
CY2011Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	8434000	USD
CY2011Q4	us-gaap	Notes Receivable Net NotesReceivableNet	542000	USD
CY2011Q4	us-gaap	Investments Investments	15239000	USD
CY2011Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	6901000	USD
CY2011Q4	wlfc	Equipment Purchase Deposits EquipmentPurchaseDeposits	1369000	USD
CY2011Q4	us-gaap	Other Assets OtherAssets	15875000	USD
CY2011Q4	us-gaap	Assets Assets	1133205000	USD
CY2011Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	16833000	USD
CY2011Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	12341000	USD
CY2011Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	84706000	USD
CY2011Q4	us-gaap	Long Term Debt LongTermDebt	718134000	USD
CY2011Q4	wlfc	Maintenance Reserves MaintenanceReserves	54509000	USD
CY2011Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	6278000	USD
CY2011Q4	us-gaap	Deferred Revenue Leases Net DeferredRevenueLeasesNet	3743000	USD
CY2011Q4	us-gaap	Liabilities Liabilities	896544000	USD
CY2011Q4	us-gaap	Preferred Stock Value Outstanding PreferredStockValueOutstanding	31915000	USD
CY2011Q4	us-gaap	Common Stock Value CommonStockValue	91000	USD
CY2011Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	56842000	USD
CY2011Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	156704000	USD
CY2011Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-8891000	USD
CY2011Q4	us-gaap	Stockholders Equity StockholdersEquity	236661000	USD
CY2011Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1133205000	USD
CY2011Q4	us-gaap	Property Subject To Or Available For Operating Lease Accumulated Depreciation PropertySubjectToOrAvailableForOperatingLeaseAccumulatedDepreciation	228708000	USD
CY2011Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	477000	USD
CY2011Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	4957000	USD
CY2011Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	2085000	USD
CY2011Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2011Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2011Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	3475000	shares
CY2011Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	3475000	shares
CY2011Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2011Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	20000000	shares
CY2011Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	9109663	shares
CY2011Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	9109663	shares
CY2011Q4	wlfc	Accumulated Other Comprehensive Income Loss Tax AccumulatedOtherComprehensiveIncomeLossTax	-5249000	USD
CY2012Q4	us-gaap	Assets Assets	1078715000	USD
CY2010	us-gaap	Share Based Compensation ShareBasedCompensation	2678000	USD
CY2010	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	594000	USD
CY2010	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	-44000	USD
CY2011	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	-385000	USD
CY2012Q4	us-gaap	Liabilities Liabilities	879162000	USD
CY2012Q4	us-gaap	Stockholders Equity StockholdersEquity	199553000	USD
CY2012Q4	us-gaap	Liabilities And Stockholders Equity LiabilitiesAndStockholdersEquity	1078715000	USD
CY2012Q4	us-gaap	Property Subject To Or Available For Operating Lease Accumulated Depreciation PropertySubjectToOrAvailableForOperatingLeaseAccumulatedDepreciation	242529000	USD
CY2012Q4	us-gaap	Allowance For Doubtful Accounts Receivable AllowanceForDoubtfulAccountsReceivable	980000	USD
CY2012Q4	us-gaap	Accumulated Depreciation Depletion And Amortization Property Plant And Equipment AccumulatedDepreciationDepletionAndAmortizationPropertyPlantAndEquipment	7087000	USD
CY2012Q4	us-gaap	Debt Instrument Unamortized Discount DebtInstrumentUnamortizedDiscount	0	USD
CY2012Q4	us-gaap	Preferred Stock Par Or Stated Value Per Share PreferredStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Preferred Stock Shares Authorized PreferredStockSharesAuthorized	5000000	shares
CY2012Q4	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	0	shares
CY2012Q4	us-gaap	Preferred Stock Shares Outstanding PreferredStockSharesOutstanding	0	shares
CY2012Q4	us-gaap	Common Stock Par Or Stated Value Per Share CommonStockParOrStatedValuePerShare	0.01
CY2012Q4	us-gaap	Common Stock Shares Authorized CommonStockSharesAuthorized	20000000	shares
CY2012Q4	us-gaap	Common Stock Shares Issued CommonStockSharesIssued	8715580	shares
CY2012Q4	us-gaap	Common Stock Shares Outstanding CommonStockSharesOutstanding	8715580	shares
CY2012Q4	wlfc	Accumulated Other Comprehensive Income Loss Tax AccumulatedOtherComprehensiveIncomeLossTax	-651000	USD
CY2012	us-gaap	Revenues Revenues	148090000	USD
CY2012	wlfc	Finance Costs Net FinanceCostsNet	47131000	USD
CY2012	us-gaap	Costs And Expenses CostsAndExpenses	147153000	USD
CY2012	us-gaap	Operating Income Loss OperatingIncomeLoss	937000	USD
CY2012	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	2696000	USD
CY2012	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-3793000	USD
CY2012	us-gaap	Net Income Loss NetIncomeLoss	1535000	USD
CY2011	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	104663000	USD
CY2011	us-gaap	Maintenance Revenue MaintenanceRevenue	39161000	USD
CY2011	us-gaap	Gain Loss On Sale Of Leased Assets Net Operating Leases GainLossOnSaleOfLeasedAssetsNetOperatingLeases	11110000	USD
CY2011	us-gaap	Other Income OtherIncome	1719000	USD
CY2011	us-gaap	Revenues Revenues	156653000	USD
CY2010	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	102133000	USD
CY2010	us-gaap	Maintenance Revenue MaintenanceRevenue	34776000	USD
CY2010	us-gaap	Gain Loss On Sale Of Leased Assets Net Operating Leases GainLossOnSaleOfLeasedAssetsNetOperatingLeases	7990000	USD
CY2010	us-gaap	Other Income OtherIncome	3403000	USD
CY2010	us-gaap	Revenues Revenues	148302000	USD
CY2011	us-gaap	Depreciation Depreciation	51250000	USD
CY2010	us-gaap	Depreciation Depreciation	48704000	USD
CY2010	us-gaap	Production Related Impairments Or Charges ProductionRelatedImpairmentsOrCharges	2874000	USD
CY2010	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	29302000	USD
CY2010	us-gaap	Equipment Expense EquipmentExpense	8118000	USD
CY2011	us-gaap	Equipment Expense EquipmentExpense	8394000	USD
CY2011	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	35701000	USD
CY2011	us-gaap	Production Related Impairments Or Charges ProductionRelatedImpairmentsOrCharges	3341000	USD
CY2011	us-gaap	Interest Expense InterestExpense	35201000	USD
CY2010	us-gaap	Interest Expense InterestExpense	40945000	USD
CY2010	us-gaap	Investment Income Interest InvestmentIncomeInterest	212000	USD
CY2011	us-gaap	Investment Income Interest InvestmentIncomeInterest	167000	USD
CY2011	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-343000	USD
CY2011	wlfc	Finance Costs Net FinanceCostsNet	35377000	USD
CY2010	wlfc	Finance Costs Net FinanceCostsNet	40733000	USD
CY2011	us-gaap	Costs And Expenses CostsAndExpenses	134063000	USD
CY2010	us-gaap	Costs And Expenses CostsAndExpenses	129731000	USD
CY2011	us-gaap	Operating Income Loss OperatingIncomeLoss	22590000	USD
CY2010	us-gaap	Operating Income Loss OperatingIncomeLoss	18571000	USD
CY2010	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1109000	USD
CY2011	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1295000	USD
CY2011	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	23885000	USD
CY2010	us-gaap	Income Loss From Continuing Operations Before Income Taxes Extraordinary Items Noncontrolling Interest IncomeLossFromContinuingOperationsBeforeIncomeTaxesExtraordinaryItemsNoncontrollingInterest	19680000	USD
CY2011	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	9377000	USD
CY2010	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	7630000	USD
CY2010	us-gaap	Net Income Loss NetIncomeLoss	12050000	USD
CY2011	us-gaap	Net Income Loss NetIncomeLoss	14508000	USD
CY2011	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3128000	USD
CY2010	us-gaap	Dividends Preferred Stock DividendsPreferredStock	3128000	USD
CY2010	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	8922000	USD
CY2011	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	11380000	USD
CY2011	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.35
CY2010	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	1.03
CY2010	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.96
CY2011	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	1.28
CY2011	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8423000	shares
CY2010	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8681000	shares
CY2010	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9251000	shares
CY2011	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8876000	shares
CY2011	us-gaap	Share Based Compensation ShareBasedCompensation	3173000	USD
CY2011	us-gaap	Amortization Of Deferred Charges AmortizationOfDeferredCharges	4544000	USD
CY2011	us-gaap	Amortization Of Deferred Hedge Gains AmortizationOfDeferredHedgeGains	483000	USD
CY2011	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	54000	USD
CY2010	us-gaap	Amortization Of Deferred Charges AmortizationOfDeferredCharges	5246000	USD
CY2010	us-gaap	Amortization Of Deferred Hedge Gains AmortizationOfDeferredHedgeGains	2956000	USD
CY2011	us-gaap	Other Noncash Income Expense OtherNoncashIncomeExpense	1113000	USD
CY2011	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	485000	USD
CY2010	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	160000	USD
CY2011	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-9377000	USD
CY2010	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-7630000	USD
CY2010	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	3045000	USD
CY2010	us-gaap	Increase Decrease In Notes Receivables IncreaseDecreaseInNotesReceivables	-196000	USD
CY2010	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	3108000	USD
CY2011	us-gaap	Increase Decrease In Notes Receivables IncreaseDecreaseInNotesReceivables	-205000	USD
CY2011	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	4507000	USD
CY2011	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-2021000	USD
CY2010	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	3733000	USD
CY2010	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	17383000	USD
CY2010	wlfc	Increase Decrease In Maintenance Reserves IncreaseDecreaseInMaintenanceReserves	3690000	USD
CY2010	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	-245000	USD
CY2010	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	-213000	USD
CY2011	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-2515000	USD
CY2011	wlfc	Increase Decrease In Maintenance Reserves IncreaseDecreaseInMaintenanceReserves	4067000	USD
CY2011	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	-552000	USD
CY2011	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	569000	USD
CY2012	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	67311000	USD
CY2011	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	76662000	USD
CY2010	us-gaap	Net Cash Provided By Used In Operating Activities Continuing Operations NetCashProvidedByUsedInOperatingActivitiesContinuingOperations	56633000	USD
CY2011	us-gaap	Proceeds From Sale Of Machinery And Equipment ProceedsFromSaleOfMachineryAndEquipment	110777000	USD
CY2010	us-gaap	Proceeds From Sale Of Machinery And Equipment ProceedsFromSaleOfMachineryAndEquipment	63777000	USD
CY2011	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	-1754000	USD
CY2011	us-gaap	Payments To Acquire Equipment On Lease PaymentsToAcquireEquipmentOnLease	144334000	USD
CY2011	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	904000	USD
CY2010	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	399000	USD
CY2010	us-gaap	Payments To Acquire Equipment On Lease PaymentsToAcquireEquipmentOnLease	121509000	USD
CY2012	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-31958000	USD
CY2011	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-45158000	USD
CY2010	us-gaap	Net Cash Provided By Used In Investing Activities Continuing Operations NetCashProvidedByUsedInInvestingActivitiesContinuingOperations	-54631000	USD
CY2011	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	155000	USD
CY2010	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	549000	USD
CY2010	us-gaap	Interest Paid Net InterestPaidNet	17629000	USD
CY2011	us-gaap	Interest Paid Net InterestPaidNet	20063000	USD
CY2011	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	132409000	USD
CY2010	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	174841000	USD
CY2010	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	268000	USD
CY2011	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	968000	USD
CY2011	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	3691000	USD
CY2010	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	776000	USD
CY2011	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	779000	USD
CY2010	us-gaap	Excess Tax Benefit From Share Based Compensation Financing Activities ExcessTaxBenefitFromShareBasedCompensationFinancingActivities	422000	USD
CY2011	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	5661000	USD
CY2010	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	4156000	USD
CY2011	us-gaap	Employee Service Share Based Compensation Cash Flow Effect Cash Used To Settle Awards EmployeeServiceShareBasedCompensationCashFlowEffectCashUsedToSettleAwards	-1262000	USD
CY2011	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	146439000	USD
CY2010	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	170037000	USD
CY2012	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-36414000	USD
CY2011	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-27289000	USD
CY2010	us-gaap	Net Cash Provided By Used In Financing Activities Continuing Operations NetCashProvidedByUsedInFinancingActivitiesContinuingOperations	-1833000	USD
CY2012	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	-1061000	USD
CY2011	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	4215000	USD
CY2010	us-gaap	Net Cash Provided By Used In Continuing Operations NetCashProvidedByUsedInContinuingOperations	169000	USD
CY2012Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	5379000	USD
CY2010Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2225000	USD
CY2009Q4	us-gaap	Cash And Cash Equivalents At Carrying Value CashAndCashEquivalentsAtCarryingValue	2056000	USD
CY2012	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	22935000	USD
CY2011	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	17067000	USD
CY2010	us-gaap	Transfer Of Portfolio Loans And Leases To Held For Sale1 TransferOfPortfolioLoansAndLeasesToHeldForSale1	70000000	USD
CY2012	dei	Entity Registrant Name EntityRegistrantName	WILLIS LEASE FINANCE CORP
CY2012	dei	Entity Central Index Key EntityCentralIndexKey	0001018164
CY2012	dei	Document Type DocumentType	10-K
CY2012	dei	Document Period End Date DocumentPeriodEndDate	2012-12-31
CY2012	dei	Amendment Flag AmendmentFlag	false
CY2012	dei	Current Fiscal Year End Date CurrentFiscalYearEndDate	--12-31
CY2012	dei	Document Fiscal Period Focus DocumentFiscalPeriodFocus	FY
CY2012	dei	Document Fiscal Year Focus DocumentFiscalYearFocus	2012
CY2012	dei	Entity Filer Category EntityFilerCategory	Accelerated Filer
CY2012	dei	Entity Well Known Seasoned Issuer EntityWellKnownSeasonedIssuer	No
CY2013Q1	dei	Entity Common Stock Shares Outstanding EntityCommonStockSharesOutstanding	8692743	shares
CY2012	dei	Entity Current Reporting Status EntityCurrentReportingStatus	Yes
CY2012	dei	Entity Voluntary Filers EntityVoluntaryFilers	No
CY2012Q2	dei	Entity Public Float EntityPublicFloat	74900000	USD
CY2010	wlfc	Shares Issued During Period Value Stock Compensation Plans SharesIssuedDuringPeriodValueStockCompensationPlans	1269000	USD
CY2010	wlfc	Cancellation Of Restricted Stock Units In Satisfaction Of Withholding Tax CancellationOfRestrictedStockUnitsInSatisfactionOfWithholdingTax	776000	USD
CY2010	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	2678000	USD
CY2010	wlfc	Adjustments To Additional Paid In Capital Tax Benefit On Disqualified Dispositions Of Shares AdjustmentsToAdditionalPaidInCapitalTaxBenefitOnDisqualifiedDispositionsOfShares	422000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	-2182000	USD
CY2010	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	9868000	USD
CY2010	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	4156000	USD
CY2011	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	16086000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Net Of Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodNetOfTax	1578000	USD
CY2011	wlfc	Adjustments To Additional Paid In Capital Tax Benefit On Disqualified Dispositions Of Shares AdjustmentsToAdditionalPaidInCapitalTaxBenefitOnDisqualifiedDispositionsOfShares	779000	USD
CY2011	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3173000	USD
CY2011	wlfc	Cancellation Of Restricted Stock Units In Satisfaction Of Withholding Tax CancellationOfRestrictedStockUnitsInSatisfactionOfWithholdingTax	968000	USD
CY2011	wlfc	Shares Issued During Period Value Stock Compensation Plans SharesIssuedDuringPeriodValueStockCompensationPlans	672000	USD
CY2011	wlfc	Employee Service Share Based Compensation Equity Effect Cash Used To Settle Awards EmployeeServiceShareBasedCompensationEquityEffectCashUsedToSettleAwards	1262000	USD
CY2011	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	5661000	USD
CY2012	us-gaap	Comprehensive Income Net Of Tax ComprehensiveIncomeNetOfTax	9196000	USD
CY2012	us-gaap	Dividends Preferred Stock DividendsPreferredStock	2493000	USD
CY2012	us-gaap	Stock Repurchased During Period Value StockRepurchasedDuringPeriodValue	12736000	USD
CY2012	wlfc	Shares Issued During Period Value Stock Compensation Plans SharesIssuedDuringPeriodValueStockCompensationPlans	1725000	USD
CY2012	wlfc	Cancellation Of Restricted Stock Units In Satisfaction Of Withholding Tax CancellationOfRestrictedStockUnitsInSatisfactionOfWithholdingTax	1194000	USD
CY2012	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-4311000	USD
CY2012	us-gaap	Adjustments To Additional Paid In Capital Sharebased Compensation Requisite Service Period Recognition Value AdjustmentsToAdditionalPaidInCapitalSharebasedCompensationRequisiteServicePeriodRecognitionValue	3144000	USD
CY2012	wlfc	Other Comprehensive Income Loss Reclassification Adjustment On Termination Of Derivatives Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnTerminationOfDerivativesBeforeTax	10143000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax	6427000	USD
CY2012	us-gaap	Derivative Instruments Gain Recognized In Other Comprehensive Income Effective Portion DerivativeInstrumentsGainRecognizedInOtherComprehensiveIncomeEffectivePortion	12259000	USD
CY2010	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	-1242000	USD
CY2011	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	838000	USD
CY2012	us-gaap	Other Comprehensive Income Unrealized Gain Loss On Derivatives Arising During Period Tax OtherComprehensiveIncomeUnrealizedGainLossOnDerivativesArisingDuringPeriodTax	4598000	USD
CY2012Q4	wlfc	Cash From Maintenance Reserve Payments Required To Be Held In Restricted Cash Account CashFromMaintenanceReservePaymentsRequiredToBeHeldInRestrictedCashAccount	9000000	USD
CY2012	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8490000	shares
CY2012	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	301000	shares
CY2011	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	453000	shares
CY2010	us-gaap	Weighted Average Number Diluted Shares Outstanding Adjustment WeightedAverageNumberDilutedSharesOutstandingAdjustment	570000	shares
CY2012	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8791000	shares
CY2010	us-gaap	Antidilutive Securities Excluded From Computation Of Earnings Per Share Amount AntidilutiveSecuritiesExcludedFromComputationOfEarningsPerShareAmount	4000	shares
CY2012	wlfc	Equity Method Investments Number EquityMethodInvestmentsNumber	2	item
CY2012Q4	us-gaap	Equity Method Investment Ownership Percentage EquityMethodInvestmentOwnershipPercentage	0.50	pure
CY2010Q4	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	3500000	USD
CY2012	wlfc	Amortization Of Lease Acquisition Costs AmortizationOfLeaseAcquisitionCosts	1600000	USD
CY2011	wlfc	Amortization Of Lease Acquisition Costs AmortizationOfLeaseAcquisitionCosts	1400000	USD
CY2010	wlfc	Amortization Of Lease Acquisition Costs AmortizationOfLeaseAcquisitionCosts	1600000	USD
CY2012	wlfc	Gain Loss On Equipment Held For Sale GainLossOnEquipmentHeldForSale	-5874000	USD
CY2011	wlfc	Gain Loss On Equipment Held For Sale GainLossOnEquipmentHeldForSale	-2306000	USD
CY2012	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	-5874000	USD
CY2011	us-gaap	Gain Loss On Sales Of Assets And Asset Impairment Charges GainLossOnSalesOfAssetsAndAssetImpairmentCharges	-3341000	USD
CY2012Q4	us-gaap	Property Subject To Or Available For Operating Lease Net PropertySubjectToOrAvailableForOperatingLeaseNet	961459000	USD
CY2012	us-gaap	Use Of Estimates UseOfEstimates	<div style='font-size:10.0pt;FONT-FAMILY: Times New Roman;'> <p style="MARGIN: 0in 0in 0pt 0.75in; TEXT-INDENT: -0.25in"><i><font style="FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: Times New Roman" size="2">(m)</font></i><i><font style="FONT-SIZE: 3pt; FONT-STYLE: italic" size="1">      </font></i> <i><font style="FONT-SIZE: 10pt; FONT-STYLE: italic" size="2">Management</font></i> <i><font style="FONT-SIZE: 10pt; FONT-STYLE: italic" size="2">Estimates</font></i></p> <p style="MARGIN: 0in 0in 0pt 0.75in; TEXT-INDENT: -0.25in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">These financial statements have been prepared on the accrual basis of accounting in accordance with accounting principles generally accepted in the United States.</font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">The preparation of consolidated financial statements requires us to make estimates and judgments that affect the reported amounts of assets, liabilities, revenues and expenses, and related disclosure of contingent assets and liabilities. On an ongoing basis, we evaluate our estimates, including those related to residual values, estimated asset lives, impairments and bad debts. We base our estimates 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.</font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">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.</font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">If the useful lives or residual values are lower than those estimated by us, 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.</font></p></div>
CY2012	us-gaap	Derivatives Methods Of Accounting Hedging Derivatives DerivativesMethodsOfAccountingHedgingDerivatives	<div style='font-size:10.0pt;FONT-FAMILY: Times New Roman;'> <p style="MARGIN: 0in 0in 0pt 55pt; TEXT-INDENT: -20pt"><i><font style="FONT-SIZE: 10pt; FONT-STYLE: italic; FONT-FAMILY: Times New Roman" size="2">(g)</font></i><i><font style="FONT-SIZE: 3pt; FONT-STYLE: italic" size="1">          </font></i> <i><font style="FONT-SIZE: 10pt; FONT-STYLE: italic" size="2">Interest Rate Hedging</font></i></p> <p style="MARGIN: 0in 0in 0pt 55pt; TEXT-INDENT: -20pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">We have entered into various derivative instruments to mitigate our exposure on our variable rate borrowings. The derivative instruments are fixed-rate interest swaps and are recorded at fair value as either an asset or liability.</font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 0.5in"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2"> </font></p> <p style="MARGIN: 0in 0in 0pt; TEXT-INDENT: 35pt"><font style="FONT-SIZE: 10pt; FONT-FAMILY: Times New Roman" size="2">While substantially all our 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 we have 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.</font></p></div>
CY2009Q4	us-gaap	Stockholders Equity StockholdersEquity	220793000	USD
CY2010Q4	us-gaap	Stockholders Equity StockholdersEquity	226970000	USD
CY2012	wlfc	Operating Leases Income Statement Lease Revenue Net OperatingLeasesIncomeStatementLeaseRevenueNet	21845000	USD
CY2011	wlfc	Operating Leases Income Statement Lease Revenue Net OperatingLeasesIncomeStatementLeaseRevenueNet	33643000	USD
CY2010	wlfc	Operating Leases Income Statement Lease Revenue Net OperatingLeasesIncomeStatementLeaseRevenueNet	36335000	USD
CY2010Q4	us-gaap	Property Subject To Or Available For Operating Lease Net PropertySubjectToOrAvailableForOperatingLeaseNet	998001000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Receivable Current OperatingLeasesFutureMinimumPaymentsReceivableCurrent	56492000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Two Years OperatingLeasesFutureMinimumPaymentsReceivableInTwoYears	38655000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Three Years OperatingLeasesFutureMinimumPaymentsReceivableInThreeYears	30436000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Four Years OperatingLeasesFutureMinimumPaymentsReceivableInFourYears	23172000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Receivable In Five Years OperatingLeasesFutureMinimumPaymentsReceivableInFiveYears	14620000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Receivable Thereafter OperatingLeasesFutureMinimumPaymentsReceivableThereafter	18133000	USD
CY2012Q4	us-gaap	Operating Leases Future Minimum Payments Receivable OperatingLeasesFutureMinimumPaymentsReceivable	181508000	USD
CY2012	wlfc	Notes Receivable From Number Of Lessees NotesReceivableFromNumberOfLessees	1	lessee
CY2012	wlfc	Number Of Aircraft Leased NumberOfAircraftLeased	2	aircraft
CY2012	wlfc	Number Of Engines Leased NumberOfEnginesLeased	1	engine
CY2012	us-gaap	Number Of Reportable Segments NumberOfReportableSegments	1	segment
CY2010	wlfc	Number Of Engines Sold To Investor Group NumberOfEnginesSoldToInvestorGroup	4	engine
CY2011	wlfc	Number Of Engines Sold To Investor Group NumberOfEnginesSoldToInvestorGroup	3	engine
CY2010	wlfc	Proceeds From Sale Of Engines To Investor Group ProceedsFromSaleOfEnginesToInvestorGroup	32900000	USD
CY2011	wlfc	Proceeds From Sale Of Engines To Investor Group ProceedsFromSaleOfEnginesToInvestorGroup	29000000	USD
CY2012	wlfc	Revenue Recognition Number Of Deliverables RevenueRecognitionNumberOfDeliverables	2	deliverable
CY2010	wlfc	Gain On Sale Of Engines To Investor Group GainOnSaleOfEnginesToInvestorGroup	7200000	USD
CY2011	wlfc	Gain On Sale Of Engines To Investor Group GainOnSaleOfEnginesToInvestorGroup	5000000	USD
CY2012Q4	wlfc	Operating Leases Lease Rent Receivable Over Thirty Days Past Due OperatingLeasesLeaseRentReceivableOverThirtyDaysPastDue	2900000	USD
CY2012Q4	wlfc	Maintenance Reserve Payments Receivable Over Thirty Days Past Due MaintenanceReservePaymentsReceivableOverThirtyDaysPastDue	2700000	USD
CY2011	wlfc	Gain Loss On Equipment Held For Operating Lease GainLossOnEquipmentHeldForOperatingLease	-1035000	USD
CY2012	us-gaap	Production Related Impairments Or Charges ProductionRelatedImpairmentsOrCharges	5874000	USD
CY2012Q4	wlfc	One Month Libor Rate At Period End OneMonthLIBORRateAtPeriodEnd	0.0021	pure
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Next Twelve Months LongTermDebtMaturitiesRepaymentsOfPrincipalInNextTwelveMonths	19237000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Two LongTermDebtMaturitiesRepaymentsOfPrincipalInYearTwo	36160000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Three LongTermDebtMaturitiesRepaymentsOfPrincipalInYearThree	20934000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Four LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFour	304215000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal In Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalInYearFive	29373000	USD
CY2012Q4	us-gaap	Long Term Debt Maturities Repayments Of Principal After Year Five LongTermDebtMaturitiesRepaymentsOfPrincipalAfterYearFive	287069000	USD
CY2012Q4	wlfc	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Lease Revenue DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedLeaseRevenue	1550000	USD
CY2011	wlfc	Income Tax Reconciliation Permanent Differences Relating To Irs Section162m IncomeTaxReconciliationPermanentDifferencesRelatingToIRSSection162m	737000	USD
CY2011	wlfc	Income Tax Reconciliation Nondeductible Expense Permanent Differences And Other Adjustments IncomeTaxReconciliationNondeductibleExpensePermanentDifferencesAndOtherAdjustments	266000	USD
CY2010	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	6690000	USD
CY2010	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	713000	USD
CY2010	wlfc	Income Tax Reconciliation State Income Tax Apportionment Adjustments IncomeTaxReconciliationStateIncomeTaxApportionmentAdjustments	396000	USD
CY2010	us-gaap	Income Tax Reconciliation Deductions Extraterritorial Income Exclusion IncomeTaxReconciliationDeductionsExtraterritorialIncomeExclusion	101000	USD
CY2012	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	185000	USD
CY2012	wlfc	Income Tax Reconciliation Tax Consequences On Sales Of Equipment IncomeTaxReconciliationTaxConsequencesOnSalesOfEquipment	-46000	USD
CY2012	wlfc	Income Tax Reconciliation Permanent Differences Relating To Irs Section162m IncomeTaxReconciliationPermanentDifferencesRelatingToIRSSection162m	385000	USD
CY2012	wlfc	Income Tax Reconciliation Nondeductible Expense Permanent Differences And Other Adjustments IncomeTaxReconciliationNondeductibleExpensePermanentDifferencesAndOtherAdjustments	-376000	USD
CY2011	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	8147000	USD
CY2011	us-gaap	Income Tax Reconciliation State And Local Income Taxes IncomeTaxReconciliationStateAndLocalIncomeTaxes	-38000	USD
CY2011	wlfc	Income Tax Reconciliation State Income Tax Apportionment Adjustments IncomeTaxReconciliationStateIncomeTaxApportionmentAdjustments	1137000	USD
CY2011	us-gaap	Income Tax Reconciliation Deductions Extraterritorial Income Exclusion IncomeTaxReconciliationDeductionsExtraterritorialIncomeExclusion	7000	USD
CY2011	wlfc	Income Tax Reconciliation Tax Consequences On Sales Of Equipment IncomeTaxReconciliationTaxConsequencesOnSalesOfEquipment	1214000	USD
CY2010	wlfc	Income Tax Reconciliation Permanent Differences Relating To Irs Section162m IncomeTaxReconciliationPermanentDifferencesRelatingToIRSSection162m	406000	USD
CY2010	wlfc	Income Tax Reconciliation Nondeductible Expense Permanent Differences And Other Adjustments IncomeTaxReconciliationNondeductibleExpensePermanentDifferencesAndOtherAdjustments	205000	USD
CY2011	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	1100000	USD
CY2010	us-gaap	Income Tax Reconciliation Change In Enacted Tax Rate IncomeTaxReconciliationChangeInEnactedTaxRate	400000	USD
CY2012	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.340	pure
CY2012	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.069	pure
CY2012	wlfc	Effective Income Tax Rate Reconciliation Tax Consequences On Sales Of Equipment EffectiveIncomeTaxRateReconciliationTaxConsequencesOnSalesOfEquipment	-0.017	pure
CY2012	wlfc	Effective Income Tax Rate Reconciliation Permanent Relating To Irs Section162 M EffectiveIncomeTaxRateReconciliationPermanentRelatingToIRSSection162M	0.143	pure
CY2012	wlfc	Effective Income Tax Rate Reconciliation Nondeductible Expense Permanent Differences And Other Adjustments EffectiveIncomeTaxRateReconciliationNondeductibleExpensePermanentDifferencesAndOtherAdjustments	-0.141	pure
CY2012	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.430	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.340	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	-0.002	pure
CY2011	wlfc	Effective Income Tax Reconciliation State Income Tax Apportionment Adjustments EffectiveIncomeTaxReconciliationStateIncomeTaxApportionmentAdjustments	0.047	pure
CY2011	wlfc	Effective Income Tax Rate Reconciliation Tax Consequences On Sales Of Equipment EffectiveIncomeTaxRateReconciliationTaxConsequencesOnSalesOfEquipment	0.051	pure
CY2011	wlfc	Effective Income Tax Rate Reconciliation Permanent Relating To Irs Section162 M EffectiveIncomeTaxRateReconciliationPermanentRelatingToIRSSection162M	0.031	pure
CY2011	wlfc	Effective Income Tax Rate Reconciliation Nondeductible Expense Permanent Differences And Other Adjustments EffectiveIncomeTaxRateReconciliationNondeductibleExpensePermanentDifferencesAndOtherAdjustments	0.010	pure
CY2011	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.391	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation At Federal Statutory Income Tax Rate EffectiveIncomeTaxRateReconciliationAtFederalStatutoryIncomeTaxRate	0.340	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation State And Local Income Taxes EffectiveIncomeTaxRateReconciliationStateAndLocalIncomeTaxes	0.037	pure
CY2010	wlfc	Effective Income Tax Reconciliation State Income Tax Apportionment Adjustments EffectiveIncomeTaxReconciliationStateIncomeTaxApportionmentAdjustments	0.020	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Deductions Extraterritorial Income Exclusion EffectiveIncomeTaxRateReconciliationDeductionsExtraterritorialIncomeExclusion	0.005	pure
CY2010	wlfc	Effective Income Tax Rate Reconciliation Permanent Relating To Irs Section162 M EffectiveIncomeTaxRateReconciliationPermanentRelatingToIRSSection162M	0.021	pure
CY2010	wlfc	Effective Income Tax Rate Reconciliation Nondeductible Expense Permanent Differences And Other Adjustments EffectiveIncomeTaxRateReconciliationNondeductibleExpensePermanentDifferencesAndOtherAdjustments	0.009	pure
CY2010	us-gaap	Effective Income Tax Rate Continuing Operations EffectiveIncomeTaxRateContinuingOperations	0.388	pure
CY2010Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	113000	USD
CY2011Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	308000	USD
CY2012Q4	us-gaap	Unrecognized Tax Benefits UnrecognizedTaxBenefits	406000	USD
CY2011	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	195000	USD
CY2012	us-gaap	Unrecognized Tax Benefits Increases Resulting From Current Period Tax Positions UnrecognizedTaxBenefitsIncreasesResultingFromCurrentPeriodTaxPositions	98000	USD
CY2012Q4	wlfc	Uncertain Tax Positions Reserved For Foreign Exposure UncertainTaxPositionsReservedForForeignExposure	100000	USD
CY2011Q4	wlfc	Uncertain Tax Positions Reserved For Foreign Exposure UncertainTaxPositionsReservedForForeignExposure	200000	USD
CY2012Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	706000	USD
CY2012Q4	wlfc	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Reserves And Allowances DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReservesAndAllowances	1596000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	962000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	542000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	32470000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	18000	USD
CY2012Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	37844000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	124292000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	4451000	USD
CY2012Q4	us-gaap	Deferred Income Tax Liabilities DeferredIncomeTaxLiabilities	90248000	USD
CY2012Q4	wlfc	Deferred Tax Assets Other Comprehensive Income DeferredTaxAssetsOtherComprehensiveIncome	651000	USD
CY2012Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	128743000	USD
CY2011Q4	wlfc	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Unearned Lease Revenue DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsUnearnedLeaseRevenue	1274000	USD
CY2011Q4	us-gaap	Deferred Tax Assets State Taxes DeferredTaxAssetsStateTaxes	603000	USD
CY2011Q4	wlfc	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Reserves And Allowances DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsReservesAndAllowances	1595000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Deferred Expense Reserves And Accruals Other DeferredTaxAssetsTaxDeferredExpenseReservesAndAccrualsOther	1795000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Tax Credit Carryforwards Alternative Minimum Tax DeferredTaxAssetsTaxCreditCarryforwardsAlternativeMinimumTax	527000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Operating Loss Carryforwards DeferredTaxAssetsOperatingLossCarryforwards	21805000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Charitable Contribution Carryforwards DeferredTaxAssetsCharitableContributionCarryforwards	16000	USD
CY2011Q4	us-gaap	Deferred Tax Assets Gross DeferredTaxAssetsGross	27615000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Property Plant And Equipment DeferredTaxLiabilitiesPropertyPlantAndEquipment	113956000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities Other DeferredTaxLiabilitiesOther	3612000	USD
CY2011Q4	wlfc	Deferred Tax Assets Other Comprehensive Income DeferredTaxAssetsOtherComprehensiveIncome	5247000	USD
CY2011Q4	us-gaap	Deferred Tax Liabilities DeferredTaxLiabilities	117568000	USD
CY2006Q1	us-gaap	Preferred Stock Shares Issued PreferredStockSharesIssued	3475000	shares
CY2011Q4	wlfc	One Month Libor Rate At Period End OneMonthLIBORRateAtPeriodEnd	0.0030	pure
CY2006Q1	us-gaap	Preferred Stock Dividend Rate Percentage PreferredStockDividendRatePercentage	0.090	pure
CY2006Q1	us-gaap	Preferred Stock Liquidation Preference PreferredStockLiquidationPreference	10.00
CY2006Q1	us-gaap	Preferred Stock Liquidation Preference Value PreferredStockLiquidationPreferenceValue	34800000	USD
CY2006Q1	us-gaap	Proceeds From Issuance Of Redeemable Preferred Stock ProceedsFromIssuanceOfRedeemablePreferredStock	31900000	USD
CY2006Q1	us-gaap	Redeemable Preferred Stock Dividends RedeemablePreferredStockDividends	260625	USD
CY2012Q4	us-gaap	Preferred Stock Redemption Amount PreferredStockRedemptionAmount	34800000	USD
CY2012Q4	us-gaap	Preferred Stock Redemption Price Per Share PreferredStockRedemptionPricePerShare	10.00
CY2012Q4	us-gaap	Redeemable Preferred Stock Dividends RedeemablePreferredStockDividends	147687	USD
CY2012Q3	us-gaap	Stock Repurchase Program Authorized Amount StockRepurchaseProgramAuthorizedAmount	100000000	USD
CY2012Q3	us-gaap	Stock Repurchase Program Period In Force1 StockRepurchaseProgramPeriodInForce1	P5Y
CY2012	us-gaap	Stock Repurchased During Period Shares StockRepurchasedDuringPeriodShares	928261	shares
CY2012	us-gaap	Payments For Repurchase Of Common Stock PaymentsForRepurchaseOfCommonStock	12736000	USD
CY2012	us-gaap	Treasury Stock Acquired Average Cost Per Share TreasuryStockAcquiredAverageCostPerShare	13.72
CY2010Q4	us-gaap	Equity Method Investments EquityMethodInvestments	9381000	USD
CY2011Q4	us-gaap	Equity Method Investments EquityMethodInvestments	15239000	USD
CY2012	us-gaap	Income Loss From Equity Method Investments IncomeLossFromEquityMethodInvestments	1759000	USD
CY2011	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	810000	USD
CY2012	us-gaap	Equity Method Investment Dividends Or Distributions EquityMethodInvestmentDividendsOrDistributions	802000	USD
CY2012	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	882000	USD
CY2012Q4	us-gaap	Notes Payable Fair Value Disclosure NotesPayableFairValueDisclosure	697300000	USD
CY2011Q4	us-gaap	Notes Payable Fair Value Disclosure NotesPayableFairValueDisclosure	634500000	USD
CY2012	wlfc	Defined Contribution Plan Maximum Percentage Of Pre Tax Salary That Could Be Deferred By Participants DefinedContributionPlanMaximumPercentageOfPreTaxSalaryThatCouldBeDeferredByParticipants	0.20	pure
CY2012	wlfc	Defined Contribution Plan Maximum Amount Of Wages To Be Deferred By Participants DefinedContributionPlanMaximumAmountOfWagesToBeDeferredByParticipants	17000	USD
CY2012	wlfc	Defined Contribution Plan Maximum Amount Of Wages To Be Deferred By Participants With50 Years Of Age DefinedContributionPlanMaximumAmountOfWagesToBeDeferredByParticipantsWith50YearsOfAge	22500	USD
CY2012	us-gaap	Defined Contribution Plan Employer Matching Contribution Percent DefinedContributionPlanEmployerMatchingContributionPercent	0.50	pure
CY2012	us-gaap	Defined Contribution Plan Maximum Annual Contribution Per Employee Percent DefinedContributionPlanMaximumAnnualContributionPerEmployeePercent	0.08	pure
CY2012	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	334122	USD
CY2011	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	306837	USD
CY2010	us-gaap	Defined Contribution Plan Cost Recognized DefinedContributionPlanCostRecognized	303000	USD
CY2011Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8796000	shares
CY2011Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8811000	shares
CY2011Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8758000	shares
CY2010Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9303000	shares
CY2010Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9255000	shares
CY2010Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9080000	shares
CY2010Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9199000	shares
CY2012	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	37000	USD
CY2012	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	242000	USD
CY2012	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	279000	USD
CY2012	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	212000	USD
CY2012	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	949000	USD
CY2012	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	175000	USD
CY2012	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	707000	USD
CY2012	us-gaap	Income Tax Expense Benefit IncomeTaxExpenseBenefit	1161000	USD
CY2011	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	1373000	USD
CY2011	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	9783000	USD
CY2011	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	11156000	USD
CY2010	us-gaap	Current Federal Tax Expense Benefit CurrentFederalTaxExpenseBenefit	-458000	USD
CY2010	us-gaap	Deferred Federal Income Tax Expense Benefit DeferredFederalIncomeTaxExpenseBenefit	7609000	USD
CY2010	us-gaap	Federal Income Tax Expense Benefit Continuing Operations FederalIncomeTaxExpenseBenefitContinuingOperations	7151000	USD
CY2011	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	-331000	USD
CY2011	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	-1448000	USD
CY2011	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	-1779000	USD
CY2010	us-gaap	Current State And Local Tax Expense Benefit CurrentStateAndLocalTaxExpenseBenefit	321000	USD
CY2010	us-gaap	Deferred State And Local Income Tax Expense Benefit DeferredStateAndLocalIncomeTaxExpenseBenefit	158000	USD
CY2010	us-gaap	State And Local Income Tax Expense Benefit Continuing Operations StateAndLocalIncomeTaxExpenseBenefitContinuingOperations	479000	USD
CY2010	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	-137000	USD
CY2010	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	7767000	USD
CY2011	us-gaap	Current Income Tax Expense Benefit CurrentIncomeTaxExpenseBenefit	1042000	USD
CY2011	us-gaap	Deferred Income Tax Expense Benefit DeferredIncomeTaxExpenseBenefit	8335000	USD
CY2012	us-gaap	Income Tax Reconciliation Income Tax Expense Benefit At Federal Statutory Income Tax Rate IncomeTaxReconciliationIncomeTaxExpenseBenefitAtFederalStatutoryIncomeTaxRate	916000	USD
CY2012	us-gaap	Income Loss From Equity Method Investments Net Of Dividends Or Distributions IncomeLossFromEquityMethodInvestmentsNetOfDividendsOrDistributions	957000	USD
CY2012	us-gaap	Proceeds From Sale Of Restricted Investments ProceedsFromSaleOfRestrictedInvestments	1754000	USD
CY2012	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	2493000	USD
CY2012	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	2402000	USD
CY2011	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	0	USD
CY2010	us-gaap	Capital Expenditures Incurred But Not Yet Paid CapitalExpendituresIncurredButNotYetPaid	6099000	USD
CY2009Q4	us-gaap	Stock Repurchase Program Authorized Amount StockRepurchaseProgramAuthorizedAmount	100000000	USD
CY2012Q4	us-gaap	Property Plant And Equipment Net PropertyPlantAndEquipmentNet	5989000	USD
CY2012Q4	wlfc	Equipment Purchase Deposits EquipmentPurchaseDeposits	1369000	USD
CY2012Q4	us-gaap	Other Assets OtherAssets	21574000	USD
CY2012Q4	us-gaap	Accounts Payable And Accrued Liabilities Current And Noncurrent AccountsPayableAndAccruedLiabilitiesCurrentAndNoncurrent	15374000	USD
CY2012	wlfc	Lease Rent And Maintenance Reserve Payments Receivable Past Due Period Minimum LeaseRentAndMaintenanceReservePaymentsReceivablePastDuePeriodMinimum	P30D
CY2010Q4	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	2000000	USD
CY2012	us-gaap	Operating Leases Income Statement Lease Revenue OperatingLeasesIncomeStatementLeaseRevenue	94591000	USD
CY2012Q4	us-gaap	Equity Method Investments EquityMethodInvestments	21831000	USD
CY2010	us-gaap	Equity Method Investment Realized Gain Loss On Disposal EquityMethodInvestmentRealizedGainLossOnDisposal	2020000	USD
CY2010	us-gaap	Proceeds From Sale Of Equity Method Investments ProceedsFromSaleOfEquityMethodInvestments	3500000	USD
CY2011	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	3128000	USD
CY2010	us-gaap	Payments Of Dividends Preferred Stock And Preference Stock PaymentsOfDividendsPreferredStockAndPreferenceStock	3128000	USD
CY2012	wlfc	Projected Maintenance Obligation Period ProjectedMaintenanceObligationPeriod	P6M
CY2012	wlfc	Number Of Geographic Regions In Which Aircraft Lessees Are Domiciled In NumberOfGeographicRegionsInWhichAircraftLesseesAreDomiciledIn	8	region
CY2012	wlfc	Preferred Sock Redemption Costs PreferredSockRedemptionCosts	2835000	USD
CY2012	us-gaap	Maintenance Revenue MaintenanceRevenue	41387000	USD
CY2012	us-gaap	Gain Loss On Sale Of Leased Assets Net Operating Leases GainLossOnSaleOfLeasedAssetsNetOperatingLeases	5499000	USD
CY2012	us-gaap	Other Income OtherIncome	6613000	USD
CY2012	us-gaap	Depreciation Depreciation	52591000	USD
CY2012	us-gaap	General And Administrative Expense GeneralAndAdministrativeExpense	34551000	USD
CY2012	us-gaap	Equipment Expense EquipmentExpense	7006000	USD
CY2012	us-gaap	Interest Expense InterestExpense	31749000	USD
CY2012	us-gaap	Investment Income Interest InvestmentIncomeInterest	80000	USD
CY2012	us-gaap	Gains Losses On Extinguishment Of Debt GainsLossesOnExtinguishmentOfDebt	-15462000	USD
CY2012	us-gaap	Share Based Compensation ShareBasedCompensation	3144000	USD
CY2012	us-gaap	Amortization Of Deferred Charges AmortizationOfDeferredCharges	3982000	USD
CY2012	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	341000	USD
CY2012	us-gaap	Amortization Of Deferred Hedge Gains AmortizationOfDeferredHedgeGains	-236000	USD
CY2012	us-gaap	Provision For Loan Lease And Other Losses ProvisionForLoanLeaseAndOtherLosses	503000	USD
CY2012	us-gaap	Payments For Repurchase Of Preferred Stock And Preference Stock PaymentsForRepurchaseOfPreferredStockAndPreferenceStock	34750000	USD
CY2012	us-gaap	Preferred Stock Redemption Discount PreferredStockRedemptionDiscount	-34750000	USD
CY2012Q4	us-gaap	Long Term Debt LongTermDebt	696988000	USD
CY2012Q4	us-gaap	Restricted Cash And Cash Equivalents RestrictedCashAndCashEquivalents	24591000	USD
CY2012Q4	wlfc	Equipment Held For Sale EquipmentHeldForSale	23607000	USD
CY2012Q4	us-gaap	Accounts Receivable Net AccountsReceivableNet	12916000	USD
CY2012Q4	us-gaap	Investments Investments	21831000	USD
CY2012Q1	us-gaap	Net Income Loss NetIncomeLoss	3289000	USD
CY2012Q2	us-gaap	Net Income Loss NetIncomeLoss	3229000	USD
CY2012Q4	us-gaap	Derivative Liabilities DerivativeLiabilities	1690000	USD
CY2012Q4	wlfc	Maintenance Reserves MaintenanceReserves	63313000	USD
CY2012Q4	us-gaap	Security Deposit Liability SecurityDepositLiability	6956000	USD
CY2012Q4	us-gaap	Deferred Revenue Leases Net DeferredRevenueLeasesNet	4593000	USD
CY2012Q4	us-gaap	Common Stock Value CommonStockValue	87000	USD
CY2012Q4	us-gaap	Additional Paid In Capital AdditionalPaidInCapital	47785000	USD
CY2012Q4	us-gaap	Retained Earnings Accumulated Deficit RetainedEarningsAccumulatedDeficit	152911000	USD
CY2012Q4	us-gaap	Accumulated Other Comprehensive Income Loss Net Of Tax AccumulatedOtherComprehensiveIncomeLossNetOfTax	-1230000	USD
CY2012	us-gaap	Nonmonetary Transaction Gain Loss Recognized On Transfer NonmonetaryTransactionGainLossRecognizedOnTransfer	1961000	USD
CY2012	us-gaap	Gain On Business Interruption Insurance Recovery GainOnBusinessInterruptionInsuranceRecovery	173000	USD
CY2012	wlfc	Extinguishment Of Debt And Termination Of Derivative Instrument Gain Loss Net Of Tax Cash Flow Impact ExtinguishmentOfDebtAndTerminationOfDerivativeInstrumentGainLossNetOfTaxCashFlowImpact	-7164000	USD
CY2011	us-gaap	Amortization Of Debt Discount Premium AmortizationOfDebtDiscountPremium	532000	USD
CY2012	us-gaap	Proceeds From Repayments Of Restricted Cash Financing Activities ProceedsFromRepaymentsOfRestrictedCashFinancingActivities	48213000	USD
CY2011	wlfc	Extinguishment Of Debt And Termination Of Derivative Instrument Gain Loss Net Of Tax Cash Flow Impact ExtinguishmentOfDebtAndTerminationOfDerivativeInstrumentGainLossNetOfTaxCashFlowImpact	-343000	USD
CY2012	wlfc	Defined Contribution Plan Minimum Age Of Employees For Specified Contribution Amount DefinedContributionPlanMinimumAgeOfEmployeesForSpecifiedContributionAmount	P50Y
CY2012Q4	us-gaap	Debt Instrument Carrying Amount DebtInstrumentCarryingAmount	696988000	USD
CY2012Q4	us-gaap	Notes Receivable Gross NotesReceivableGross	700000	USD
CY2012	wlfc	Extinguishment Of Debt And Termination Of Derivative Instrument Gain Loss Net Of Tax ExtinguishmentOfDebtAndTerminationOfDerivativeInstrumentGainLossNetOfTax	-15462000	USD
CY2011	wlfc	Extinguishment Of Debt And Termination Of Derivative Instrument Gain Loss Net Of Tax ExtinguishmentOfDebtAndTerminationOfDerivativeInstrumentGainLossNetOfTax	-343000	USD
CY2012	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	1725000	USD
CY2011	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	672000	USD
CY2010	us-gaap	Proceeds From Issuance Of Shares Under Incentive And Share Based Compensation Plans ProceedsFromIssuanceOfSharesUnderIncentiveAndShareBasedCompensationPlans	1269000	USD
CY2012	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	97000	USD
CY2011	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	195000	USD
CY2010	us-gaap	Income Tax Reconciliation Tax Contingencies IncomeTaxReconciliationTaxContingencies	113000	USD
CY2012	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	0.036	pure
CY2011	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	0.008	pure
CY2010	us-gaap	Effective Income Tax Rate Reconciliation Tax Contingencies EffectiveIncomeTaxRateReconciliationTaxContingencies	0.006	pure
CY2012Q4	wlfc	Operating Loss Carryforwards Windfalls Included OperatingLossCarryforwardsWindfallsIncluded	800000	USD
CY2012	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3144000	USD
CY2011	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	3173000	USD
CY2010	us-gaap	Allocated Share Based Compensation Expense AllocatedShareBasedCompensationExpense	2678000	USD
CY2012	wlfc	Investment In Joint Venture InvestmentInJointVenture	5635000	USD
CY2011	wlfc	Investment In Joint Venture InvestmentInJointVenture	5373000	USD
CY2012	us-gaap	Payments To Acquire Interest In Joint Venture PaymentsToAcquireInterestInJointVenture	5636000	USD
CY2011	us-gaap	Payments To Acquire Interest In Joint Venture PaymentsToAcquireInterestInJointVenture	8943000	USD
CY2012Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	654000	USD
CY2011Q4	us-gaap	Financing Receivable Allowance For Credit Losses FinancingReceivableAllowanceForCreditLosses	840000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Derivatives Qualifying As Hedges Net Of Tax OtherComprehensiveIncomeLossDerivativesQualifyingAsHedgesNetOfTax	7661000	USD
CY2012Q4	wlfc	Number Of Notes Receivable Relating To Settlement Agreements NumberOfNotesReceivableRelatingToSettlementAgreements	1	item
CY2012Q4	wlfc	Operating Loss Carryforwards Additional Tax Benefits Reflected OperatingLossCarryforwardsAdditionalTaxBenefitsReflected	2200000	USD
CY2012Q1	us-gaap	Revenues Revenues	35739000	USD
CY2012Q2	us-gaap	Revenues Revenues	35153000	USD
CY2012Q3	us-gaap	Revenues Revenues	37506000	USD
CY2012Q4	us-gaap	Revenues Revenues	39692000	USD
CY2011Q1	us-gaap	Revenues Revenues	40812000	USD
CY2011Q2	us-gaap	Revenues Revenues	38692000	USD
CY2011Q3	us-gaap	Revenues Revenues	39480000	USD
CY2011Q4	us-gaap	Revenues Revenues	37669000	USD
CY2010Q1	us-gaap	Revenues Revenues	35699000	USD
CY2010Q2	us-gaap	Revenues Revenues	32778000	USD
CY2010Q3	us-gaap	Revenues Revenues	40191000	USD
CY2010Q4	us-gaap	Revenues Revenues	39634000	USD
CY2010Q4	us-gaap	Net Income Loss NetIncomeLoss	4010000	USD
CY2012Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2507000	USD
CY2012Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2447000	USD
CY2012Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-7976000	USD
CY2012Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	-771000	USD
CY2011Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	4281000	USD
CY2011Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2699000	USD
CY2011Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1534000	USD
CY2011Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2866000	USD
CY2010Q1	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2268000	USD
CY2010Q2	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	1125000	USD
CY2010Q3	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	2301000	USD
CY2010Q4	us-gaap	Net Income Loss Available To Common Stockholders Basic NetIncomeLossAvailableToCommonStockholdersBasic	3228000	USD
CY2012	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.45
CY2012Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.30
CY2012Q3	us-gaap	Net Income Loss NetIncomeLoss	-7194000	USD
CY2012Q4	us-gaap	Net Income Loss NetIncomeLoss	2211000	USD
CY2011Q1	us-gaap	Net Income Loss NetIncomeLoss	5063000	USD
CY2011Q2	us-gaap	Net Income Loss NetIncomeLoss	3481000	USD
CY2011Q3	us-gaap	Net Income Loss NetIncomeLoss	2316000	USD
CY2011Q4	us-gaap	Net Income Loss NetIncomeLoss	3648000	USD
CY2010Q1	us-gaap	Net Income Loss NetIncomeLoss	3050000	USD
CY2010Q2	us-gaap	Net Income Loss NetIncomeLoss	1907000	USD
CY2010Q3	us-gaap	Net Income Loss NetIncomeLoss	3083000	USD
CY2012Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.29
CY2012Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.94
CY2012Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	-0.09
CY2011Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.50
CY2011Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.33
CY2011Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.18
CY2011Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.34
CY2010Q1	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.26
CY2010Q2	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.13
CY2010Q3	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.27
CY2010Q4	us-gaap	Earnings Per Share Basic EarningsPerShareBasic	0.37
CY2012	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.43
CY2012Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.29
CY2012Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.28
CY2012Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.91
CY2012Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	-0.09
CY2011Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.47
CY2011Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.31
CY2011Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.17
CY2011Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.33
CY2010Q1	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.24
CY2010Q2	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.12
CY2010Q3	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.25
CY2010Q4	us-gaap	Earnings Per Share Diluted EarningsPerShareDiluted	0.35
CY2012Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8404000	shares
CY2012Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8585000	shares
CY2012Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8667000	shares
CY2012Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8277000	shares
CY2011Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8552000	shares
CY2011Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8322000	shares
CY2011Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8397000	shares
CY2011Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8425000	shares
CY2010Q1	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8660000	shares
CY2010Q2	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8729000	shares
CY2010Q3	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8683000	shares
CY2010Q4	us-gaap	Weighted Average Number Of Shares Outstanding Basic WeightedAverageNumberOfSharesOutstandingBasic	8654000	shares
CY2012Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8756000	shares
CY2012Q2	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8848000	shares
CY2012Q3	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8889000	shares
CY2012Q4	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	8525000	shares
CY2011Q1	us-gaap	Weighted Average Number Of Diluted Shares Outstanding WeightedAverageNumberOfDilutedSharesOutstanding	9048000	shares
CY2012	us-gaap	Increase Decrease In Deferred Income Taxes IncreaseDecreaseInDeferredIncomeTaxes	-1161000	USD
CY2012	us-gaap	Increase Decrease In Accounts Receivable IncreaseDecreaseInAccountsReceivable	4985000	USD
CY2012	us-gaap	Increase Decrease In Notes Receivables IncreaseDecreaseInNotesReceivables	-542000	USD
CY2012	us-gaap	Increase Decrease In Other Operating Assets IncreaseDecreaseInOtherOperatingAssets	1256000	USD
CY2012	us-gaap	Increase Decrease In Accounts Payable And Accrued Liabilities IncreaseDecreaseInAccountsPayableAndAccruedLiabilities	-5936000	USD
CY2012	us-gaap	Increase Decrease In Restricted Cash IncreaseDecreaseInRestrictedCash	-1694000	USD
CY2012	wlfc	Increase Decrease In Maintenance Reserves IncreaseDecreaseInMaintenanceReserves	8804000	USD
CY2012	us-gaap	Increase Decrease In Deposit Other Assets IncreaseDecreaseInDepositOtherAssets	-678000	USD
CY2012	us-gaap	Increase Decrease In Deferred Revenue IncreaseDecreaseInDeferredRevenue	301000	USD
CY2012	us-gaap	Proceeds From Sale Of Machinery And Equipment ProceedsFromSaleOfMachineryAndEquipment	34607000	USD
CY2012	us-gaap	Payments To Acquire Equipment On Lease PaymentsToAcquireEquipmentOnLease	61464000	USD
CY2012	us-gaap	Payments To Acquire Property Plant And Equipment PaymentsToAcquirePropertyPlantAndEquipment	1219000	USD
CY2012	us-gaap	Proceeds From Issuance Of Long Term Debt ProceedsFromIssuanceOfLongTermDebt	603693000	USD
CY2012	us-gaap	Payments Of Debt Issuance Costs PaymentsOfDebtIssuanceCosts	11949000	USD
CY2012	us-gaap	Payments Related To Tax Withholding For Share Based Compensation PaymentsRelatedToTaxWithholdingForShareBasedCompensation	1194000	USD
CY2012	us-gaap	Repayments Of Long Term Debt RepaymentsOfLongTermDebt	626923000	USD
CY2012	us-gaap	Interest Paid Net InterestPaidNet	21528000	USD
CY2012	us-gaap	Income Taxes Paid Net IncomeTaxesPaidNet	105000	USD
CY2012	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	4598000	USD
CY2012	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	7661000	USD
CY2011	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-8933000	USD
CY2010	us-gaap	Unrealized Gain Loss On Derivatives UnrealizedGainLossOnDerivatives	-22057000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax	11349000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Reclassification Adjustment On Derivatives Included In Net Income Before Tax OtherComprehensiveIncomeLossReclassificationAdjustmentOnDerivativesIncludedInNetIncomeBeforeTax	18633000	USD
CY2011	us-gaap	Derivative Instruments Gain Recognized In Other Comprehensive Income Effective Portion DerivativeInstrumentsGainRecognizedInOtherComprehensiveIncomeEffectivePortion	2416000	USD
CY2010	us-gaap	Derivative Instruments Gain Recognized In Other Comprehensive Income Effective Portion DerivativeInstrumentsGainRecognizedInOtherComprehensiveIncomeEffectivePortion	-3424000	USD
CY2011	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	838000	USD
CY2010	us-gaap	Other Comprehensive Income Derivatives Qualifying As Hedges Tax Portion Attributable To Parent OtherComprehensiveIncomeDerivativesQualifyingAsHedgesTaxPortionAttributableToParent	-1242000	USD
CY2011	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	1578000	USD
CY2010	us-gaap	Other Comprehensive Income Loss Net Of Tax OtherComprehensiveIncomeLossNetOfTax	-2182000	USD

Files In Submission

Name	View Source	Status
0001104659-13-021812-index-headers.html	Edgar Link	pending
0001104659-13-021812-index.html	Edgar Link	pending
0001104659-13-021812.txt	Edgar Link	pending
0001104659-13-021812-xbrl.zip	Edgar Link	pending
a12-28274_110k.htm	Edgar Link	pending
a12-28274_1ex10d21.htm	Edgar Link	pending
a12-28274_1ex11d1.htm	Edgar Link	pending
a12-28274_1ex12d1.htm	Edgar Link	pending
a12-28274_1ex21d1.htm	Edgar Link	pending
a12-28274_1ex23d1.htm	Edgar Link	pending
a12-28274_1ex31d1.htm	Edgar Link	pending
a12-28274_1ex31d2.htm	Edgar Link	pending
a12-28274_1ex32.htm	Edgar Link	pending
FilingSummary.xml	Edgar Link	unprocessable
Financial_Report.xls	Edgar Link	pending
R1.htm	Edgar Link	pending
R10.htm	Edgar Link	pending
R11.htm	Edgar Link	pending
R12.htm	Edgar Link	pending
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R2.htm	Edgar Link	pending
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R64.htm	Edgar Link	pending
R7.htm	Edgar Link	pending
R8.htm	Edgar Link	pending
R9.htm	Edgar Link	pending
report.css	Edgar Link	pending
Show.js	Edgar Link	pending
wlfc-20121231.xml	Edgar Link	completed
wlfc-20121231.xsd	Edgar Link	pending
wlfc-20121231_cal.xml	Edgar Link	unprocessable
wlfc-20121231_def.xml	Edgar Link	unprocessable
wlfc-20121231_lab.xml	Edgar Link	unprocessable
wlfc-20121231_pre.xml	Edgar Link	unprocessable

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$WLFC
WILLIS LEASE FINANCE CORP Stock $wlfc

2011 Q4 Form 10-K Financial Statement

#000110465913021812 Filed on March 18, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WLFC WILLIS LEASE FINANCE CORP Stock $wlfc

2011 Q4 Form 10-K Financial Statement

#000110465913021812 Filed on March 18, 2013

Income Statement

Balance Sheet

Cashflow Statement

Facts In Submission

Files In Submission

$WLFC
WILLIS LEASE FINANCE CORP Stock $wlfc