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

Prepayments On Flight Equipment (Summary Of Movements In Prepayments On Flight Equipment) (Details)

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Prepayments On Flight Equipment (Summary Of Movements In Prepayments On Flight Equipment) (Details) (USD $)
In Thousands, unless otherwise specified
12 Months Ended
Dec. 31, 2011
Dec. 31, 2010
Dec. 31, 2009
Prepayments On Flight Equipment [Abstract]      
Net book value at beginning of period $ 199,417 $ 527,666 $ 448,945
Prepayments made 43,313 132,706 431,410
Prepayments applied against the purchase of flight equipment (151,550) (468,933) (375,690)
Interest capitalized 4,439 7,978 23,001
Net book value at end of period $ 95,619 $ 199,417 $ 527,666