CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2012	Apr. 30, 2012	Mar. 30, 2012	Dec. 31, 2011
Investment securities:
Securities held-to-maturity, fair value	$ 3,927			$ 9,736
Statement [Line Items]
Preferred stock, par value (in dollars per share)	$ 0.01			$ 0.01
Preferred stock, shares authorized (in shares)	1,000,000			1,000,000
Common stock, par value (in dollars per share)	$ 0.01			$ 0.01
Common stock, shares authorized (in shares)	100,000,000			10,000,000
Common stock, shares issued (in shares)	7,424,572			7,422,164
Common stock, shares outstanding (in shares)	7,424,572			7,422,164
Series A Preferred Stock [Member]
Statement [Line Items]
Preferred stock, shares issued (in shares)	11,560			11,560
Preferred stock, shares outstanding (in shares)	11,560			11,560
Preferred stock, liquidation preference (in dollars per share)	$ 1,000.00			$ 1,000.00
Series B Preferred Stock [Member]
Statement [Line Items]
Preferred stock, shares issued (in shares)	164,575	22,379	142,196	164,575
Preferred stock, shares outstanding (in shares)	164,575			164,575
Preferred stock, liquidation preference (in dollars per share)	$ 17.2		$ 17.20	$ 17.2