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Stock-Based Compensation and Other Incentive Plans (Narrative) (Details)
shares in Millions, $ in Millions
3 Months Ended 9 Months Ended 12 Months Ended
Dec. 31, 2016
USD ($)
award
shares
Oct. 01, 2016
USD ($)
Dec. 31, 2015
USD ($)
Dec. 31, 2014
USD ($)
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of award types granted in period | award 3      
Fresh-start accounting adjustment to incentive compensation $ 3.7      
Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense $ 1.0 $ 1.9 $ 5.9 $ 5.6
Time Based Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of award types granted in period | award 2      
Time Based Restricted Stock Units (RSUs) [Member] | Minimum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 1 year      
Time Based Restricted Stock Units (RSUs) [Member] | Maximum [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Vesting period 3 years      
Performance Based Restricted Stock Units (RSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of award types granted in period | award 1      
Vesting period 3 years      
Volatility rate (percent) 58.00%      
Employee Stock Option [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense   0.2 $ 1.4 3.2
2016 Omnibus Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Shares authorized for incentive plan | shares 3.0      
Number of shares available for grant | shares 2.6      
Long Term Incentive Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Requisite service period     3 years  
Compensation expense $ 1.6 $ 7.2 $ 7.9 $ 10.1
Reduction in scheduled compensation payouts 6.0      
Amounts unpaid under long term incentive plan $ 13.9   $ 17.8