Consolidated Subsidiaries (Details 2) (USD $)	12 Months Ended					0 Months Ended	4 Months Ended
	Dec. 31, 2011	Dec. 31, 2012	Dec. 31, 2012 Silver Creek	Dec. 31, 2011 Silver Creek	Dec. 31, 2010 Silver Creek	Aug. 20, 2010 Silver Creek Series A Preferred Stock	Dec. 17, 2010 Silver Creek Series A Preferred Stock	Dec. 31, 2012 Silver Creek Series A Preferred Stock	Dec. 31, 2011 Silver Creek Series A Preferred Stock
Consolidated subsidiaries
Additional shares purchased by parent company related to initial purchase						12,000,000
Shares issued to other investors							4,190,000
Proceeds from shares issued to other investors						$ 4,165,000
Issuance cost for shares issued to other investors	1,946,000					25,000
Ownership interest (as a percent)			74.00%	74.00%
Non-controlling interest	574,000	97,000	97,000	574,000	1,027,000
Total assets of consolidated subsidiaries	85,299,000	148,974,000	2,202,000	2,302,000
Total liabilities of consolidated subsidiaries	$ 106,990,000	$ 155,394,000	$ 1,763,000	$ 39,000
Shares owned by employees and directors of the parent company (as a percent)								6.00%	6.00%