Consolidated Balance Sheets Parenthetical (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Shareholders' equity
Common Stock, par value (in dollars per share)	$ 1.50	$ 1.50
Common Stock, shares authorized (in shares)	75,000	75,000
Common Stock, shares issued (in shares)	18,572	18,572
Treasury Stock, shares (in shares)	1,026	980