UNAUDITED BALANCE SHEETS (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	9 Months Ended	12 Months Ended
	Sep. 30, 2011	Dec. 31, 2010
ASSETS
Investment securities, held-to-maturity, fair value	377,050	0
Other real estate owned, covered under loss sharing agreements with the FDIC	4,883	5,342
Stockholders' equity:
Preferred stock, par value (in dollars per share)	1,000	1,000
Preferred stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, par value (in dollars per share)	1.00	1.00
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	11,395,440	8,398,013
Common stock, shares outstanding (in shares)	11,395,440	8,398,013
Common Class A [Member]
Stockholders' equity:
Preferred stock, shares outstanding (in shares)	2,892	0
Preferred stock, shares outstanding (in shares)	2,892	0
Preferred stock, Dividend rate	5.00%	5.00%
Common Class B [Member]
Stockholders' equity:
Preferred stock, shares outstanding (in shares)	145	0
Preferred stock, shares outstanding (in shares)	145	0
Preferred stock, Dividend rate	9.00%	9.00%