Derivatives (Details Textual) (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2012 interestratederivatives	Jun. 30, 2011	Jun. 30, 2012	Jun. 30, 2011	Dec. 31, 2011
Derivative [Line Items]
Number of Derivatives Matured	4
Accelerated Amortization of Deferred Hedge Losses on Sold Aircraft		$ 1,839	$ 1,839	$ 1,839
Expense Expected to be Charged Against Earnings for Term Financing No. 1 Hedge Instruments.	23,470		23,470
Expense expected to be charged against earnings for ECA Financing hedge instruments.	9,303		9,303
Number of Derivatives Terminated	2
Net Deferred Derivative Loss to be Amortized	50,429
Derivatives (Textual) [Abstract]
Weighted average interest pay rates of derivatives	2.87%		2.87%		5.04%
Accrued interest payable related to interest rate derivatives	34,455		34,455
Net interest settlements on interest rate derivatives over next 12 months			22,130
Accrued interest payable interest rate cash flow hedge liability at fair value	345		345
Deferred net loss reclassified form OCI into interest expense on terminated interest rate derivatives			12,937
Amount of Deferred Gain) or Loss Expected to be Amortized			$ 33,009