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Stock-Based Compensation Plans Narrative (Details) - USD ($)
$ / shares in Units, $ in Millions
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Statutory tax rate 35.00% 35.00% 35.00%
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized $ 7.8    
Employee Service Share-based Compensation, Nonvested Awards, Total Compensation Cost Not yet Recognized, Period for Recognition 2 years    
Percentage of fair value at purchase date 85.00%    
Discount from market price, purchase date 15.00%    
Employee Option Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares reserved for future grants under the stock option and compensation plan 11,500,000    
Directors' Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Shares reserved for future grants under the stock option and compensation plan 396,000    
Non Qualified Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures 0   50,000
Stock Options      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value   $ 3.14 $ 2.49
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Net of Forfeitures   288,626 617,869
Restricted Stock/RSUs/PSUs      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Share-based Compensation Arrangement by Share-based Payment Award, Options, Grants in Period, Weighted Average Grant Date Fair Value $ 10.66