Consolidated Balance Sheets (Parenthetical) (USD $) In Thousands, except Per Share data, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011
Shareholders' equity:
Common shares, par value	$ 1.25	$ 1.25
Common Stock, Shares Authorized	120,000	120,000
Common shares, shares issued	58,931	58,931
Treasury shares, shares	10,796	5,025