Financial Instruments (Details) (USD $)	12 Months Ended
	Dec. 31, 2011	Dec. 31, 2010
TRA investment carrying value	$ 1,700,000
Investment in TRA's preferred stock using cost method of accounting	1,700,000
Impairment charge	3,477,000
Revolving obligation under Credit Facility		53,000,000
TRA Investment [Member]
TRA investment carrying value	1,700,000	5,200,000
Investment in TRA's preferred stock using cost method of accounting	$ 1,700,000	$ 5,200,000