Consolidated Statements of Equity (USD $) In Thousands, except Share data	Total	Common Shares of Beneficial Interest Outstanding	Additional Paid-in Capital	Net Unrealized Appreciation of Retained Interests in Transferred Assets	Cumulative Net Income	Cumulative Dividends	Treasury Stock	Cumulative Preferred Stock of Subsidiary
Beginning Balances at Dec. 31, 2009	$ 152,458	$ 111	$ 152,611	$ 325	$ 167,686	$ (164,274)	$ (4,901)	$ 900
Beginning Balances, shares at Dec. 31, 2009		10,548,354
Net unrealized appreciation (depreciation)	216			216
Cumulative effect adjustment	201			(265)	466
Share-based compensation expense	134		134
Share-based compensation expense, shares		9,700
Shares issued through exercise of stock options	11		11
Shares issued through exercise of stock options, shares	1,500	1,500
Dividends ($0.64, $0.64 and $0.60 per share for the period ended December 31, 2010, 2011 and 2012, respectively)	(6,757)					(6,757)
Net income (loss)	4,297				4,297
Ending Balances at Dec. 31, 2010	150,560	111	152,756	276	172,449	(171,031)	(4,901)	900
Ending Balances, shares at Dec. 31, 2010		10,559,554
Net unrealized appreciation (depreciation)	118			118
Share-based compensation expense	178		178
Share-based compensation expense, shares		15,000
Dividends ($0.64, $0.64 and $0.60 per share for the period ended December 31, 2010, 2011 and 2012, respectively)	(6,767)					(6,767)
Net income (loss)	3,647				3,647
Ending Balances at Dec. 31, 2011	147,736	111	152,934	394	176,096	(177,798)	(4,901)	900
Ending Balances, shares at Dec. 31, 2011	10,574,554	10,574,554
Net unrealized appreciation (depreciation)	(116)			(116)
Share-based compensation expense	138		138
Share-based compensation expense, shares		15,000
Dividends ($0.64, $0.64 and $0.60 per share for the period ended December 31, 2010, 2011 and 2012, respectively)	(6,353)					(6,353)
Net income (loss)	(2,179)				(2,179)
Ending Balances at Dec. 31, 2012	$ 139,226	$ 111	$ 153,072	$ 278	$ 173,917	$ (184,151)	$ (4,901)	$ 900
Ending Balances, shares at Dec. 31, 2012	10,589,554	10,589,554