Stockholders' Equity (Narrative) (Details) (USD $)	0 Months Ended	12 Months Ended			12 Months Ended
	Feb. 15, 2012	Dec. 31, 2009	Sep. 30, 2012	Dec. 31, 2011	Dec. 31, 2011 Series A Preferred Stock [Member]	Dec. 31, 2009 Series A Preferred Stock [Member]
Class of Stock [Line Items]
Preferred stock, shares authorized			50,000	50,000		39,000
Liquidation preference per share, preferred stock						$ 1,000
Warrant to purchase common shares, expiration period		10 years
Warrant, common shares issuable upon exercise		313,505
Warrant to purchase common shares, exercise price		$ 18.66
Sale of preferred stock and warrant to U.S. Treasury, aggregate price		$ 39,000,000
Stock repurchased from U.S. Treasury, shares					39,000
Stock repurchased from U.S. Treasury, value					39,000,000
Warrant repurchased from U.S. Treasury, value	$ 1,200,724