Consolidated Statements of Cash Flows - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Cash flows from operating activities:
Net income	$ 7,356	$ 7,247	$ 15,626
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization expense	69,586	65,441	58,727
Write-down of equipment	9,181	5,602	6,461
Stock-based compensation expenses	4,150	3,509	3,439
Amortization of deferred costs	4,307	4,319	4,113
Amortization of interest rate derivative cost		(499)	(404)
Allowances and provisions	697	(81)	(684)
Gain on sale of leased equipment	(8,354)	(5,753)	(5,675)
Gain on insurance settlement			(351)
Gain on debt extinguishment	(1,151)
Income from joint ventures	(1,175)	(1,329)	(3,526)
Deferred income taxes	6,508	3,996	(4,389)
Changes in assets and liabilities:
Receivables	(5,857)	4,454	2,269
Spare parts inventory	4,128	(5,964)
Other assets	(2,635)	(590)	(3,158)
Accounts payable and accrued expenses	1,669	(1,881)	(23)
Restricted cash	9,636	(6,831)	(5,701)
Maintenance reserves	4,580	(10,861)	14,022
Security deposits	5,747	1,159	614
Unearned lease revenue	748	793	(1,064)
Net cash provided by operating activities	109,121	62,731	80,296
Cash flows from investing activities:
Proceeds from sale of equipment (net of selling expenses)	45,701	43,632	38,706
Restricted cash for investing activities	(16,763)	6,366	(20,502)
Capital contribution to joint ventures	(630)	(17,623)	(11,219)
Dividends received from joint ventures	1,304	847
Acquisitions of J.T. Power, net of cash acquired			(4,171)
Investment in WOLF, net of cash acquired			2,020
Purchase of equipment held for operating lease and for sale	(183,616)	(128,075)	(136,231)
Purchase of property, equipment and furnishings	(3,988)	(13,831)	(453)
Net cash used in investing activities	(157,992)	(108,684)	(131,850)
Cash flows from financing activities:
Proceeds from issuance of notes payable	192,700	154,395	130,000
Debt issuance cost	(13)	(5,074)	(1,252)
Interest bearing security deposits	(1,606)	4,553	7,588
Proceeds from shares issued under stock compensation plans	518	410	680
Cancellation of restricted stock units in satisfaction of withholding tax	(1,558)	(1,544)	(1,248)
Repurchase of common stock	(16,500)	(5,352)	(5,918)
Excess tax benefit from stock-based compensation	26	311
Principal payments on notes payable	(153,816)	(101,054)	(70,874)
Decrease in restricted cash	25,359
Net cash provided by (used in) financing activities	45,110	46,645	58,976
Increase/(Decrease) in cash and cash equivalents	(3,761)	692	7,422
Cash and cash equivalents at beginning of period	13,493	12,801	5,379
Cash and cash equivalents at end of period	9,732	13,493	12,801
Net cash paid for:
Interest	35,568	33,132	33,931
Income Taxes	353	210	111
Supplemental disclosures of non-cash investing activities:
Purchase of aircraft and engines, liability incurred but not paid	4,662	8,188	63
Engines and equipment, transferred from Held for Operating Lease to Held for Sale but not settled	22,079	3,071	$ 15,166
Equipment held for sale, transferred to spare parts inventory	$ 6,061	$ 9,649