Preferred Stock and Common Stock Warrant (Details) (USD $) In Thousands, except Share data, unless otherwise specified	0 Months Ended		3 Months Ended	6 Months Ended
	Sep. 30, 2010	Feb. 27, 2009	Jun. 30, 2013	Jun. 30, 2013	Jun. 30, 2012	Dec. 31, 2012	Sep. 29, 2010
Class of Stock [Line Items]
Preferred stock, shares issued			30,000	30,000		30,000
Proceeds received in exchange		$ 30,000
Adjustments to additional paid-in capital, common stock warrant		1,363
Shares Authorized (shares)			2,000,000	2,000,000		2,000,000
Shares Outstanding (shares)			30,000	30,000		30,000
Carrying Value			19,569	19,569		18,865
Common Stock
Class of Stock [Line Items]
Number of shares to be purchased by warrants (shares)		513,113
Exercise price of warrants (dollars per share)		8.77
Preferred Class A
Class of Stock [Line Items]
Dividend rate (percent)				0.00%
Shares Authorized (shares)			1,000,000	1,000,000		1,000,000
Shares Outstanding (shares)			0	0		0
Carrying Value			0	0		0
Preferred Class B
Class of Stock [Line Items]
Shares Authorized (shares)			1,000,000	1,000,000		1,000,000
Carrying Value		28,637
Preferred Class B | Series A Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares issued		30,000
Warrant term (years)		10 years
Liquidation preference		$ 1,000
Fair value of stock on exchange date	29,026
Dividend rate (percent)		5.00%		5.00%
Shares Outstanding (shares)			0	0		0
Carrying Value			0	0		0
Preferred Class B | Series CD Preferred Stock
Class of Stock [Line Items]
Preferred stock, shares issued		30,000					30,000
Liquidation preference		$ 1,000
Gain recorded on exchange of stock	12,867
Period for initial dividend rate (years)				8 years
Expected dividend rate (percent)				9.00%
Discount rate (percent)				10.00%
Accretion period of redemption discount (years)			8 years
Accretion of redemption discount				704	634
Dividend rate (percent)	2.00%	9.00%		2.00%
Shares Outstanding (shares)			30,000	30,000		30,000
Carrying Value			$ 19,569	$ 19,569		$ 18,865	$ 16,159
Preferred Class B | Series CD Preferred Stock | Banking Subsidiary Uncertified for 180 Days
Class of Stock [Line Items]
Number of days uncertified, first period (days)				180 days
Dividend rate (percent)				5.00%
Preferred Class B | Series CD Preferred Stock | Banking Subsidiary Uncertified for 270 Days
Class of Stock [Line Items]
Number of days uncertified, second period (days)				90 days
Dividend rate (percent)	9.00%