Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Jun. 30, 2014	Dec. 31, 2013
Condensed Consolidated Balance Sheets
Common stock, par value (in dollars per share)	$ 1	$ 1
Common stock, shares authorized (in shares)	100,000,000	100,000,000
Common stock, shares issued (in shares)	65,953,718	65,912,638
Common stock, shares outstanding (in shares)	43,023,504	42,982,424
Treasury stock, shares (in shares)	22,930,214	22,930,214