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Stock Repurchases
9 Months Ended
Sep. 30, 2011
Comprehensive Income/Stock repurchases [Abstract] 
Stock Repurchases
12. Stock Repurchases:
     In June 2008 our Board of Directors approved a $300 million share repurchase plan which authorizes us to repurchase shares of our common stock through open market purchases (the “2008 Share Repurchase Plan”). The 2008 Share Repurchase Plan has no stated expiration date. Additionally, in connection with the vesting of restricted stock units and performance share units, employees may surrender shares to satisfy tax-withholding obligations. Through the third quarter of 2011, we repurchased 2,305,810 shares of our common stock including 25,399 in surrendered shares, totaling $90.9 million. These repurchased and surrendered shares are included in Treasury Stock.