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General (Company, AIG Offering And The Share Repurchase, And Genesis Funding Limited Transaction) (Narrative) (Details) $ in Thousands |  | 1 Months Ended | 12 Months Ended |
--- | --- | --- | --- | ---
Jun. 09, 2015 shares | Aug. 24, 2015 shares | Dec. 31, 2016 USD ($) item shares | Dec. 31, 2014 USD ($) item | Dec. 31, 2015 USD ($)
General [Line Items] |  |  |  |  |
Total Assets | $ |  |  | $ 41,620,453 |  | $ 43,749,499
Ordinary shares, acquired |  |  | 25,012,978 |  |
Number of aircraft | item |  |  | 1,022 |  |
GFL [Member] |  |  |  |  |
General [Line Items] |  |  |  |  |
Total Assets | $ |  |  |  | $ 727,000 |
Number of aircraft | item |  |  |  | 37 |
Sale of Class A common shares, percentage of ownership before transaction |  |  |  | 100.00% |
AIG [Member] | AerCap Holdings N.V. [Member] |  |  |  |  |
General [Line Items] |  |  |  |  |
Number of ordinary shares sold in secondary offering | 71,184,686 | 10,677,702 |  |  |
Ordinary shares, acquired | 15,698,588 |  |  |  |

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