Income Taxes (Summary of Unrecognized Tax Benefits and Temporary Differences) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Unrecognized tax benefits
Balance at the beginning of the period	$ 274	$ 464
Increases related to current year tax positions	4	5
Decreases due to tax positions expired	(72)	(195)
Balance at the end of the period	206	274
Uncertain tax positions, reserved for tax exposure in Europe	0
Deferred tax assets:
Unearned lease revenue	1,839	1,511
State taxes	1,035	944
Reserves and allowances	1,659	898
Other accruals	2,501	1,767
Alternative minimum tax credit	377	377
Net operating loss carry forward	35,693	35,827
Charitable contributions	52	42
Total deferred tax assets	43,156	41,366
Less: valuation allowance	(1,280)	(1,280)
Net deferred tax assets	41,876	40,086
Deferred tax liabilities:
Depreciation and impairment on aircraft engines and equipment	(147,827)	(137,496)
Other deferred tax assets (liabilities)	422	981
Net deferred tax liabilities	(147,405)	(136,515)
Other comprehensive income, deferred tax asset	551	275
Net deferred tax liabilities	(104,978)	$ (96,154)
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	105,000
State
Deferred tax liabilities:
Operating loss carryforwards	$ 4,700