CONSOLIDATED BALANCE SHEETS (Parenthetical) (USD $)	Dec. 31, 2011	Dec. 31, 2010
Shareholders' equity
Common stock, par value (in dollars per share)	$ 1.25	$ 1.25
Common stock, Shares authorized (in shares)	40,000,000	40,000,000
Common stock, shares issued (in shares)	18,517,101	17,660,312
Treasury stock (in shares)	2,023,838	2,023,838