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Stock Compensation (Details) (USD $)
In Millions, except Share data, unless otherwise specified
3 Months Ended 9 Months Ended
Sep. 30, 2014
Sep. 30, 2013
Sep. 30, 2014
Sep. 30, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Allocated Share-based Compensation Expense $ 0.8   $ 2.4 $ 2.1
Options Granted (in shares)     209,500  
The total intrinsic value of all stock options exercised 0.2 1.2 1.6 2.6
Stock Options [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based Compensation Arrangement By Share-based Payment Award Expiration     10 years  
Total unrecognized compensation cost related to non-vested share based compensation arrangements $ 4.8   $ 4.8  
Restricted Stock [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Granted (in shares) 104,100   104,100  
Granted, Average Grant Date Fair Value (in dollars per share) $ 20.93   $ 20.93  
2008 Plan [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares authorized for grant under plan (in shares) 3,000,000   3,000,000  
Minimum [Member] | Stock Options [Member]
       
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period, in years     3 years