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Consolidated Balance Sheets (Parenthetical) (USD $)
In Thousands, except Per Share data, unless otherwise specified
Dec. 31, 2011
Dec. 31, 2010
Balance Sheets [Abstract]    
Allowance for doubtful accounts $ 11,706 $ 30,112
Preferred stock, par value $ 0.01 $ 0.01
Preferred stock authorized but unissued and undesignated 10,000 10,000
Preferred stock, shares issued 0 0
Preferred stock, shares outstanding 0 0
Common stock, par value $ 0.01 $ 0.01
Common stock, shares authorized 100,000 100,000
Common stock, shares issued 45,955 45,811
Common stock, shares outstanding 44,298 45,761
Treasury Stock, shares 1,657 50