Condensed Consolidated Balance Sheets (Parenthetical) (USD $)	Mar. 31, 2012	Dec. 31, 2011
Stockholders' deficiency:
Preferred stock, par value	$ 1	$ 1
Preferred stock, shares authorized	10,000,000	10,000,000
Common stock, par value	$ 0.10	$ 0.10
Common stock, shares authorized	150,000,000	150,000,000
Common stock, shares issued	83,026,033	83,022,812
Common stock, shares outstanding	79,445,212	79,441,991
Common stock in treasury, shares	3,580,821	3,580,821