Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2012	Dec. 31, 2011
Condensed Consolidated Balance Sheets [Abstract]
Preferred Stock, Shares Authorized	15,000,000	15,000,000
Preferred Stock, Shares Outstanding	0	0
Preferred Stock, Par Value	$ 1	$ 1
Common Stock, Shares Authorized	250,000,000	250,000,000
Common Stock, Shares Issued	67,342,973	67,335,341
Common Stock, Par Value	$ 1	$ 1
Treasury Stock, Shares	9,239,260	9,110,389