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Commitments And Contingencies (Summary Of Movements In Prepayments On Flight Equipment) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Commitments And Contingencies [Abstract]    
Net book value at beginning of period $ 3,486,514 $ 223,815
Prepayments made during the period 747,541 320,396
ILFC Transaction   3,176,322
Interest capitalized during the period 79,230 [1] 80,328
Prepayments and capitalized interest applied against the purchase of flight equipment (1,012,859) (314,347)
Net book value at end of period $ 3,300,426 $ 3,486,514
[1] Includes an out of period adjustment of $16.9 million. See Note 2-Basis of presentation.