Consolidated Balance Sheet (Parenthetical) (unaudited) (USD $)	Jun. 30, 2011	Dec. 31, 2010
Current Assets:
Allowance for doubtful accounts	$ 3.2	$ 3.1
Stockholder's Equity:
Common stock, par value	$ 0.01	$ 0.01
Common stock, shares authorized	250,000,000	250,000,000
Common stock, shares issued	23,875,831	23,875,831
Common stock, shares held in treasury	4,541,900	4,541,900