Consolidated Condensed Balance Sheets Parenthetical (USD $) In Thousands, except Per Share data, unless otherwise specified	Mar. 31, 2012	Dec. 31, 2011
Shareholders' equity
Common Stock, par value per share	$ 1.5	$ 1.5
Common Stock, shares authorized	75,000	75,000
Common Stock, shares issued	18,572	18,572
Treasury Stock, shares	972	980