Annual and transition report of foreign private issuers pursuant to Section 13 or 15(d)

Investments (Components Of Investments) (Details)

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Investments (Components Of Investments) (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Schedule of Equity Method Investments [Line Items]    
Equity investment in unconsolidated joint venture $ 84,079 $ 72,985
AerDragon [Member]
   
Schedule of Equity Method Investments [Line Items]    
Equity investment in unconsolidated joint venture 36,473 30,332
Equity investment, ownership percentage 25.00%  
AerLift [Member]
   
Schedule of Equity Method Investments [Line Items]    
Equity investment in unconsolidated joint venture 46,456 41,662
Equity investment, ownership percentage 40.00%  
AerData [Member]
   
Schedule of Equity Method Investments [Line Items]    
Equity investment in unconsolidated joint venture $ 1,150 $ 991
Equity investment, ownership percentage 43.00%