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Stock-Based Compensation (PSU Activity) (Details) (Restricted Stock Units RSU and Performance Stock Units PSU, USD $)
In Thousands, except Share data, unless otherwise specified
12 Months Ended
Dec. 31, 2012
Dec. 31, 2011
Dec. 31, 2010
Weighted-Average Fair Value      
Granted (In dollars per share) $ 13.78 $ 14.78 $ 10.1
Performance Stock Units Psu Subject to Market Condition
     
Share-based Compensation Arrangement by Share-based Payment Award, Equity Instruments Other than Options, Nonvested, Number of Shares [Roll Forward]      
Outstanding at January 1, 2012 (Shares) 677,971    
Granted (Shares) 1,846,014    
Vested (Shares) (124,874)    
Forfeited or Expired (Shares) (100,438)    
Outstanding at December 31, 2012 (Shares) 2,298,673    
Weighted-Average Fair Value      
Outstanding at January 1, 2012 Weighted Average Fair Value (In dollars per share) $ 13.34    
Granted (In dollars per share) $ 11.89    
Vested (In dollars per share) $ 14.60    
Forfeited or Expired (In dollars per share) $ 11.87    
Outstanding at December 31, 2012 Weighted Average Fair Value (In dollars per share) $ 12.18    
Outstanding at January 1, 2012 Aggregate Intrinsic Value (In thousands of dollars) $ 7,946    
Outstanding at December 31, 2012 Aggregate Intrinsic Value (In thousands of dollars) $ 37,399