Income Taxes (Details 2) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011
Unrecognized tax benefits
Balance at the beginning of the period	$ 308,000	$ 113,000
Increases related to current year tax positions	98,000	195,000
Balance at the end of the period	406,000	308,000
Uncertain tax positions, reserved for tax exposure in Europe	100,000	200,000
Deferred tax assets:
Unearned lease revenue	1,550,000	1,274,000
State taxes	706,000	603,000
Reserves and allowances	1,596,000	1,595,000
Other accruals	962,000	1,795,000
Alternative minimum tax credit	542,000	527,000
Net operating loss carry forward	32,470,000	21,805,000
Charitable contributions	18,000	16,000
Total deferred tax assets	37,844,000	27,615,000
Deferred tax liabilities:
Depreciation and impairment on aircraft engines and equipment	(124,292,000)	(113,956,000)
Other deferred tax liabilities	(4,451,000)	(3,612,000)
Net deferred tax liabilities	(128,743,000)	(117,568,000)
Other comprehensive income, deferred tax asset	651,000	5,247,000
Net deferred tax liabilities	$ (90,248,000)	$ (84,706,000)