Consolidated Balance Sheets (Parenthetical) (Unaudited) (USD $)	Mar. 31, 2013	Dec. 31, 2012
Statement - Consolidated Balance Sheets (Parenthetical) (Unaudited) [Line Items]
Common stock, shares authorized	20,000,000	20,000,000
Common stock, stated value	$ 5.00	$ 5.00
Common stock, shares issued	4,728,267	4,728,267
Common stock, shares outstanding	4,527,850	4,525,518
Treasury stock, shares	200,418	202,749