CONSOLIDATED BALANCE SHEETS - UNAUDITED (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
ASSETS
Investment securities, held-to-maturity fair value	$ 291,663	$ 330,809
Other real estate owned, covered under loss sharing agreements with the FDIC	$ 6,363	$ 6,166
Shareholders' 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
Preferred stock, shares issued (in shares)	0	0
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)	11,395,302	11,347,683
Common stock, shares outstanding (in shares)	11,395,302	11,347,683
Treasury stock (in shares)	47,619	47,619