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Equipment Held for Operating Lease and Notes Receivable - Schedule of Carrying Values (Details) - USD ($) $ in Thousands | Jun. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Lessor, Lease, Description [Line Items] |  |
Accumulated Depreciation | $ (12,282) | $ (11,356)
Net Book Value | 31,148 | 31,753
Engines and related equipment |  |
Lessor, Lease, Description [Line Items] |  |
Gross Value | 2,291,301 | 2,238,160
Accumulated Depreciation | (488,930) | (445,780)
Net Book Value | 1,802,371 | 1,792,380
Aircraft and airframes |  |
Lessor, Lease, Description [Line Items] |  |
Gross Value | 82,128 | 89,613
Accumulated Depreciation | (6,220) | (7,312)
Net Book Value | 75,908 | 82,301
Marine vessel |  |
Lessor, Lease, Description [Line Items] |  |
Gross Value | 13,010 | 12,963
Accumulated Depreciation | (1,381) | (1,031)
Net Book Value | 11,629 | 11,932
Equipment Held For Operating Lease |  |
Lessor, Lease, Description [Line Items] |  |
Gross Value | 2,386,439 | 2,340,736
Accumulated Depreciation | (496,531) | (454,123)
Net Book Value | $ 1,889,908 | $ 1,886,613

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