CONDENSED CONSOLIDATED BALANCE SHEETS Parentheticals (USD $) In Millions, except Share data, unless otherwise specified	Sep. 30, 2012	Dec. 31, 2011
Credit facility borrowings classified as long-term debt	$ 400.0
Preferred Stock, Shares Authorized	25,000,000	25,000,000
Common Stock, Shares Authorized	200,000,000	200,000,000
Common Stock, Par Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares, Issued	123,779,646	123,229,210
Common Stock, Shares, Outstanding	110,630,790	110,284,228
Treasury Stock, Shares	13,148,856	12,944,982