Consolidated Balance Sheets [Parenthetical] (USD $)	Sep. 30, 2012	Dec. 31, 2011
Securities held-to-maturity, fair value (in dollars)		$ 24,000
Serial preferred stock, par value (in dollars per share)	$ 1	$ 1
Serial preferred stock, shares authorized	5,000,000	5,000,000
Serial preferred stock, shares issued	20,000	20,000
Serial preferred stock, shares outstanding	20,000	20,000
Serial preferred stock, liquidation preference (in dollars)	$ 22,200,000	$ 21,400,000
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized	35,000,000	35,000,000
Common stock, shares issued	4,773,100	4,749,415
Common stock, shares, outstanding	4,773,100	4,749,415