SCHEDULE I - Parent Company Information (Details) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2013	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
ASSETS
Cash and cash equivalents	$ 12,801	$ 5,379	$ 6,440	$ 2,225
Equipment held for operating lease, less accumulated depreciation	1,033,022	961,459	981,505
Equipment held for sale	32,491	23,607
Operating lease related receivable, net of allowances	13,286	12,916
Investments	23,485	21,831
Deferred income taxes	40,739	37,844
Property, equipment & furnishings, less accumulated depreciation	4,950	5,989
Intangible assets, net	1,396
Equipment purchase deposits	1,369	1,369
Other assets, net	22,355	21,574
Total assets	1,199,229	1,078,715
Liabilities:
Accounts payable and accrued expenses	16,283	15,374
Liabilities under derivative instruments		1,690
Deferred income taxes	86,685	90,638
Notes payable	787,614	696,988
Maintenance reserves	77,335	63,313
Security deposits	15,158	6,956
Unearned lease revenue	3,549	4,593
Total liabilities	986,624	879,552
Shareholders' equity:
Preferred stock ($0.01 par value, 5,000,000 shares authorized; 0 shares issued and outstanding at December 31, 2013 and 2012)
Common stock ($0.01 par value, 20,000,000 shares authorized; 8,399,739 and 8,715,580 shares issued and outstanding at December 31, 2013 and 2012, respectively)	84	87
Paid-in capital in excess of par	44,741	47,785
Retained earnings	167,455	151,829
Accumulated other comprehensive loss, net of income (loss) tax expense (benefit)	325	(538)
Total shareholders' equity	212,605	199,163	236,271	226,580
Total liabilities and shareholders' equity	1,199,229	1,078,715
Parent Company
ASSETS
Cash and cash equivalents	1,520	4,142	6,429	2,202
Equipment held for operating lease, less accumulated depreciation	464,912	266,302
Equipment held for sale	26,382	18,271
Operating lease related receivable, net of allowances	1,911	3,688
Due from affiliate	1,393
Investments	23,485	21,831
Investment in subsidiaries	97,869	198,443
Deferred income taxes		2,774
Property, equipment & furnishings, less accumulated depreciation	4,868	5,989
Intangible assets, net	271
Equipment purchase deposits	1,369	1,369
Other assets, net	9,774	9,257
Total assets	633,754	532,066
Liabilities:
Accounts payable and accrued expenses	8,813	11,313
Due to subsidiaries, net		2,648
Liabilities under derivative instruments		1,690
Deferred income taxes	6,993
Notes payable	378,828	301,671
Maintenance reserves	15,282	11,787
Security deposits	10,008	1,994
Unearned lease revenue	1,225	1,800
Total liabilities	421,149	332,903
Shareholders' equity:
Common stock ($0.01 par value, 20,000,000 shares authorized; 8,399,739 and 8,715,580 shares issued and outstanding at December 31, 2013 and 2012, respectively)	84	87
Paid-in capital in excess of par	44,741	47,785
Retained earnings	167,455	151,829
Accumulated other comprehensive loss, net of income (loss) tax expense (benefit)	325	(538)
Total shareholders' equity	212,605	199,163
Total liabilities and shareholders' equity	$ 633,754	$ 532,066