Stockholder's Equity (Details 4) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Sep. 30, 2012	Sep. 30, 2011	Dec. 31, 2011	Dec. 31, 2010
Stockholders' Equity [Line Items]
Common stock issued on conversion of preferred stock			1,039,721
Preferred Stock, Shares Outstanding	26,224,854		26,224,854		25,724,854	11,349,854
Preferred stock, shares issued during period			11,500,000	14,375,000
Preferred stock redeemed, shares			(11,000,000)	0
Preferred stock balance average rate			0.06493	0.07013	0.07013	0.07663
Preferred stock balance issued average rate			0.06500	0.06500
Preferred stock balance redeemed average rate			0.07716	0.000
Preferred stock redemption charge	$ 0	$ 0	$ 6,242	$ 0