Junior Subordinated Notes Held By Subsidiary Trust (Details) (USD $)	12 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010	Dec. 19, 2012
Extinguishment of Debt [Line Items]
Equity Method Investment, Ownership Percentage		100.00%
Redemption of Junior Subordinated Notes				$ 30,928,000
Rate of Premium on Redemption of Junior Subordinated Debentures				3.017%
interest Rate on Junior Subordinated Notes				8.62%
Gain (loss) on debt extinguishment	(4,144,000)	0	0
Junior Subordinated Debenture [Member]
Extinguishment of Debt [Line Items]
Gain (loss) on debt extinguishment	$ 1,000,000