CONDENSED CONSOLIDATED BALANCE SHEETS Parentheticals (USD $)	Mar. 31, 2013	Dec. 31, 2012
Common Stock, Shares Authorized	200,000,000	200,000,000
Common Stock, Par Value Per Share	$ 0.01	$ 0.01
Common Stock, Shares, Issued	149,597,084	149,094,571
Common Stock, Shares, Outstanding	136,310,324	135,944,172
Treasury Stock, Shares	13,286,760	13,150,399