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Maintenance Rights Intangible And Lease Premium, Net (Summary Of Details Of Lease Premiums And Related Accumulated Amortization) (Details) - USD ($)
$ in Thousands
Dec. 31, 2015
Dec. 31, 2014
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount $ 416,465 $ 439,365
Accumulated amortization (52,328) (21,330)
Finite-lived intangible assets 364,137 418,035
Lease Premium [Member]    
Finite-Lived Intangible Assets [Line Items]    
Gross carrying amount 107,140 119,763
Accumulated amortization (36,413) (25,996)
Finite-lived intangible assets $ 70,727 $ 93,767