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SCHEDULE II - VALUATION ACCOUNTS
 12 Months Ended
Dec. 31, 2023
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
SCHEDULE II - VALUATION ACCOUNTS
WILLIS LEASE FINANCE CORPORATION AND SUBSIDIARIES
SCHEDULE II - VALUATION ACCOUNTS

(In thousands)
 Balance at
Beginning
of Period		Cumulative Effect Due to Adoption of New Accounting StandardAdditions
Charged
(Credited)
to Expense		Net
(Deductions)
Recoveries		Balance at
End of Period
Year Ended December 31, 2022
Accounts receivable, allowance for doubtful accounts$1,154 $— $837 $(480)$1,511 
Deferred tax valuation allowance$518 $— $18 $— $536 
Year Ended December 31, 2023
Accounts receivable, allowance for doubtful accounts and credit losses$1,511 $20 $824 $(44)$2,311 
Notes receivable, allowance for credit losses$— $58 $11 $— $69 
Investments in sales-type leases, allowance for credit losses$— $6 $3 $— $9 
Deferred tax valuation allowance$536 $— $442 $— $978 
Deductions in allowance for doubtful accounts and credit losses represent uncollectible accounts written off, net of recoveries.