Preferred Stock (Details) (USD $)			0 Months Ended		0 Months Ended
	Dec. 31, 2012	Dec. 31, 2011	Feb. 08, 2013 Non-Cumulative Perpetual Preferred Stock, Series A [Member]	Sep. 15, 2011 Non-Cumulative Perpetual Preferred Stock, Series A [Member]	Sep. 15, 2011 Fixed Rate Cumulative Perpetual Preferred Stock, [Member]
Preferred Stock [Abstract]
Preferred stock, shares issued (in shares)	22,847	22,847		22,847
Preferred stock, per share liquidation preference (in dollars per share)	$ 1,000	$ 1,000		$ 1,000
Preferred stock, aggregate purchase price	$ 22,847,000	$ 22,847,000		$ 22,847,000
Redemption of preferred stock (in shares)					17,390
Preferred shares liquidation amount (in dollars per share)					$ 1,000
Redemption of preferred stock			$ 10,000,000		$ 17,390,000