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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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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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