Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Sep. 30, 2011	Dec. 31, 2010
Condensed Consolidated Balance Sheets
Common stock, par	$ 1	$ 1
Common stock, authorized	60,000,000	60,000,000
Common stock, issued	45,901,110	45,599,036
Common stock, outstanding	45,901,110	45,599,036