Income Taxes (Summary of Unrecognized Tax Benefits and Temporary Differences) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Unrecognized tax benefits
Balance at the beginning of the period	$ 464	$ 566
Increases related to current year tax positions	5	109
Decreases due to tax positions expired	(195)	(211)
Balance at the end of the period	274	464
Uncertain tax positions, reserved resulting from the extraterritorial income exclusion			$ 200
Uncertain tax positions, reserved for tax exposure in Europe	0	0
Deferred tax assets:
Unearned lease revenue	1,511	1,368
State taxes	944	564
Reserves and allowances	898	938
Other accruals	1,767	582
Alternative minimum tax credit	377	377
Net operating loss carry forward	35,827	37,173
Charitable contributions	42	28
Total deferred tax assets	41,366	41,030
Less: valuation allowance	(1,280)	(1,310)
Net deferred tax assets	40,086	39,720
Deferred tax liabilities:
Depreciation and impairment on aircraft engines and equipment	(138,084)	(129,332)
Other deferred tax liabilities	981	(898)
Net deferred tax liabilities	(137,103)	(130,230)
Other comprehensive income, deferred tax asset	275
Net deferred tax liabilities	(96,742)	$ (90,510)
Additional tax benefits reflected in net operating tax loss carryforwards pursuant to SFAS 123R	3,000
Tax effects of windfalls included in net operating loss carryforwards	1,000
Federal
Deferred tax liabilities:
Operating loss carryforwards	100,500
State
Deferred tax liabilities:
Operating loss carryforwards	$ 3,900