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

Accrued Maintenance Liability (Details)

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Accrued Maintenance Liability (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2016
Dec. 31, 2015
Accrued Maintenance Liability [Abstract]    
Accrued maintenance liability at beginning of period $ 3,185,794 $ 3,194,365
Maintenance payments received 794,711 776,488
Maintenance payments returned (505,407) (558,477)
Release to income other than upon sale (421,332) (243,809)
Release to income upon sale (341,161) (49,077)
Lessor contribution, top ups and other 8,315 18,403
Interest accretion 26,563 47,901
Additions due to aircraft acquisitions 3,093  
Accrued maintenance liability at end of period $ 2,750,576 $ 3,185,794