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Accrued Maintenance Liability | 12 Months Ended
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Dec. 31, 2015
Accrued Maintenance Liability [Abstract] |
Accrued Maintenance Liability | 14. Accrued maintenance liability Movements in accrued maintenance liability during the years ended December 31, 2015 and 2014 were as follows:
| Year Ended December 31,
| 2015 |  | 2014
Accrued maintenance liability at beginning of period | $ | 3,194,365 |  | $ | 466,293
ILFC Transaction |  | — |  |  | 2,575,118
GFL Transaction |  | — |  |  | (88,523)
Maintenance payments received |  | 776,488 |  |  | 561,558
Maintenance payments returned |  | (558,477) |  |  | (286,041)
Release to income upon redelivery |  | (243,809) |  |  | (92,296)
Release to income upon sale |  | (49,077) |  |  | —
Lessor contribution and top ups |  | 18,403 |  |  | 5,570
Interest accretion |  | 47,901 |  |  | 52,686
Accrued maintenance liability at end of period | $ | 3,185,794 |  | $ | 3,194,365

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- Definition Accrued Maintenance Liability [Text Block] + References No definition available. + Details
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