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Stock-Based Compensation (Stock Appreciation Rights) (Details) (Stock Appreciation Rights (SARs), USD $)
In Millions, except Share data, unless otherwise specified
1 Months Ended 12 Months Ended
Sep. 30, 2012
May 31, 2012
Mar. 31, 2012
Dec. 31, 2012
Fair value assumptions        
Risk-free interest rate (as a percent) 1.00% 1.18% 1.56%  
Dividend yield (as a percent) 3.80% 4.20% 3.50%  
Expected life 6 years 6 months 6 years 6 months 6 years 6 months  
Volatility (as a percent) 44.30% 44.00% 43.90%  
SAR grant price $ 21.37 $ 19.65 $ 23.73  
Fair value of SAR award (in dollars per share) $ 6.20 $ 4.77 $ 6.10  
Number of Shares        
Outstanding at 1/1/2012       0
Granted (in shares)       707,012
Forfeited/expired (in shares)       (181,725)
Outstanding at 1/1/2012       525,287
Weighted Average Exercise Price        
Outstanding at 1/1/2012       $ 0.00
Granted       $ 21.23
Forfeited/expired       $ 21.23
Outstanding at 12/31/2012       $ 21.23
Outstanding at 12/31/2012 - Aggregate Intrinsic Value       $ 1.2
Outstanding at 12/31/2012 - Weighted Average Remaining Contractual Term       9 years 3 months 18 days
Unrecognized stock-based compensation expense       $ 2.3
Unrecognized stock-based compensation expense, period of recognition       4 years 3 months 18 days
1995 Executive Incentive Compensation Plan
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (in shares) 43,058 345,502 318,452