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

Maintenance Rights Intangible And Lease Premium, Net (Narrative) (Details)

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Maintenance Rights Intangible And Lease Premium, Net (Narrative) (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Maintenance Rights Intangible And Lease Premium, Net [Abstract]      
Amortization of intangibles $ 23,042 $ 17,967 $ 8,746