Subordinated Debentures (Details) (USD $)	9 Months Ended
	Sep. 30, 2012	Sep. 30, 2011	Jul. 31, 2012
Debt Instrument [Line Items]
Conversion of subordinated debentures	$ 20,770,000	$ 0
Stock Issued During Period, Shares, Conversion of Convertible Securities	2,549,333
Cash			1,300,000
Convertible Subordinated Debt [Member]
Debt Instrument [Line Items]
Conversion of subordinated debentures	$ 20,600,000
Shares of Subordinated Debentures Converted During Period	688,327
Shares of Convertible Subordinated Debentures			44,001