Other Assets (Details) (USD $)			3 Months Ended	6 Months Ended
	Jun. 30, 2011	Dec. 31, 2010	Jun. 30, 2011 BuyEfficient, LLC	Jun. 30, 2011 BuyEfficient, LLC
Other assets, net
Property and equipment, net	$ 1,864,000	$ 1,758,000
Intangible assets	8,777,000
Notes receivable	90,483,000	3,950,000
Interest Receivable	450,000
Other receivables	6,808,000	4,403,000
Other	3,458,000	2,632,000
Total other assets, net	111,840,000	12,743,000
Intangible assets
Percentage of equity interest purchased (as a percent)			50.00%	50.00%
Intangible assets			8,800,000	8,800,000
Remaining useful life of intangibles, low end of range (in years)				7
Remaining useful life of intangibles, high end of range (in years)				20
Accumulated amortization			300,000	300,000
Amortization expense			$ 200,000	$ 300,000