Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Dec. 31, 2011	Dec. 31, 2010
ASSETS
Securities held to maturity, fair value	$ 0	$ 3,440
Other real estate owned, valuation allowance	$ 1,902	$ 1,622
Shareholders' equity:
Preferred stock, par value (in dollars per share)	$ 5	$ 5
Preferred stock, authorized (in shares)	2,000,000	2,000,000
Preferred stock, outstanding (in shares)	0	0
Common stock, par value (in dollars per share)	$ 1	$ 1
Preferred stock, authorized (in shares)	20,000,000	20,000,000
Preferred stock, outstanding (in shares)	7,806,869	6,127,735