SCHEDULE I - Parent Company Information - Condensed Balance Sheets (Details) - USD ($) $ in Thousands	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
ASSETS
Cash and cash equivalents	$ 9,732	$ 13,493	$ 12,801	$ 5,379
Equipment held for operating lease, less accumulated depreciation	1,122,859	1,066,448	1,033,022
Equipment held for sale	23,454	18,114
Operating lease related receivable, net of allowances	14,072	8,912
Spare parts inventory	20,526	18,593
Investments	41,295	41,590
Deferred income taxes	41,366	41,030
Property, equipment & furnishings, less accumulated depreciation	20,247	17,955
Intangible assets, net	932	1,164
Other assets, net	22,434	24,099
Total assets	1,308,577	1,261,626
Liabilities:
Accounts payable and accrued expenses	21,665	21,614
Deferred income taxes	96,742	90,510
Notes payable	878,684	840,956
Maintenance reserves	71,054	66,474
Security deposits	25,010	20,869
Unearned lease revenue	5,090	4,342
Total liabilities	1,098,245	1,044,765
Shareholders' equity:
Common stock ($0.01 par value, 20,000,000 shares authorized; 7,548,395 and 8,346,304 shares issued and outstanding at December 31, 2015 and December 31, 2014, respectively)	75	83
Paid-in capital in excess of par	28,720	42,076
Retained earnings	182,058	174,702
Accumulated other comprehensive loss, net of income (loss) tax expense (benefit)	(521)
Total shareholders' equity	210,332	216,861	212,605	199,163
Total liabilities and shareholders' equity	1,308,577	1,261,626
Parent Company
ASSETS
Cash and cash equivalents	2,894	2,411	$ 1,520	$ 4,142
Equipment held for operating lease, less accumulated depreciation	763,549	628,341
Equipment held for sale	22,680	15,768
Operating lease related receivable, net of allowances	4,502	3,379
Spare parts inventory	16,120	14,906
Due from affiliate	20,286	19,044
Investments	41,295	41,590
Investment in subsidiaries	118	6,054
Property, equipment & furnishings, less accumulated depreciation	19,964	17,867
Intangible assets, net	271	271
Other assets, net	13,577	13,528
Total assets	905,256	763,159
Liabilities:
Accounts payable and accrued expenses	17,660	10,820
Deferred income taxes	37,272	26,132
Notes payable	578,218	457,364
Maintenance reserves	38,072	32,845
Security deposits	20,612	16,864
Unearned lease revenue	3,090	2,273
Total liabilities	694,924	546,298
Shareholders' equity:
Common stock ($0.01 par value, 20,000,000 shares authorized; 7,548,395 and 8,346,304 shares issued and outstanding at December 31, 2015 and December 31, 2014, respectively)	75	83
Paid-in capital in excess of par	28,720	42,076
Retained earnings	182,058	174,702
Accumulated other comprehensive loss, net of income (loss) tax expense (benefit)	(521)
Total shareholders' equity	210,332	216,861
Total liabilities and shareholders' equity	$ 905,256	$ 763,159