Consolidated Balance Sheets (Unaudited) (Parenthetical) (USD $) In Thousands, except Share data, unless otherwise specified	Mar. 31, 2013	Dec. 31, 2012
Consolidated Balance Sheets Parenthetical
Securities held to maturity, fair value	$ 73,761	$ 72,364
Preferred stock, shares authorized	30,000	30,000
Common stock, stated par value	$ 1.00	$ 1.00
Common Stock, shares authorized	3,000,000	3,000,000
Common Stock, shares issued	1,830,266	1,830,266
Common Stock, shares outstanding	1,652,618	1,653,472
Treasury stock, shares, at cost	177,648	176,794