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Leases - Schedule of Future Minimum Lease Payments Under Non-Cancelable Operating Leases (Details) $ in Thousands | Dec. 31, 2022 USD ($)
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Leases [Abstract] |
2023 | $ 3,268
2024 | 3,218
2025 | 2,691
2026 | 757
2027 | 562
Thereafter | 854
Total | $ 11,350

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- References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Lessee, Noncancelable Operating Lease, Liability, to be Paid + References No definition available. + Details
Name: | wlfc_LesseeNoncancelableOperatingLeaseLiabilityToBePaid
Namespace Prefix: | wlfc_
Data Type: | xbrli:monetaryItemType
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- Definition Lessee, Noncancelable Operating Lease, Liability, to be Paid, After Year Five + References No definition available. + Details
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Namespace Prefix: | wlfc_
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- Definition Lessee, Noncancelable Operating Lease, Liability, to be Paid, Year Five + References No definition available. + Details
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Namespace Prefix: | wlfc_
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Period Type: | instant

X
- Definition Lessee, Noncancelable Operating Lease, Liability, to be Paid, Year Four + References No definition available. + Details
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Namespace Prefix: | wlfc_
Data Type: | xbrli:monetaryItemType
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X
- Definition Lessee, Noncancelable Operating Lease, Liability, to be Paid, Year One + References No definition available. + Details
Name: | wlfc_LesseeNoncancelableOperatingLeaseLiabilityToBePaidYearOne
Namespace Prefix: | wlfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
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- Definition Lessee, Noncancelable Operating Lease, Liability, to be Paid, Year Three + References No definition available. + Details
Name: | wlfc_LesseeNoncancelableOperatingLeaseLiabilityToBePaidYearThree
Namespace Prefix: | wlfc_
Data Type: | xbrli:monetaryItemType
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- Definition Lessee, Noncancelable Operating Lease, Liability, to be Paid, Year Two + References No definition available. + Details
Name: | wlfc_LesseeNoncancelableOperatingLeaseLiabilityToBePaidYearTwo
Namespace Prefix: | wlfc_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant