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Investments (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Schedule of Equity Method Investments [Line Items] |  |
Undistributed earnings of investments | $ 39,400 | $ 48,200
Peregrine |  |
Schedule of Equity Method Investments [Line Items] |  |
Cost method investments | 3,300 | 3,300
Variable Interest Entity, Not Primary Beneficiary |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity investment in unconsolidated joint venture | $ 119,979 | 128,812
Variable Interest Entity, Not Primary Beneficiary | AerDragon |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity investment, ownership percentage | 16.70% |
Equity investment in unconsolidated joint venture | $ 68,673 | 65,920
Variable Interest Entity, Not Primary Beneficiary | AerLift |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity investment, ownership percentage | 39.30% |
Equity investment in unconsolidated joint venture | $ 35,188 | 47,644
Variable Interest Entity, Not Primary Beneficiary | ACSAL |  |
Schedule of Equity Method Investments [Line Items] |  |
Equity investment, ownership percentage | 19.40% |
Equity investment in unconsolidated joint venture | $ 16,118 | $ 15,248

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