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Share-Based Compensation - Narrative (Details) - USD ($)
$ in Millions
3 Months Ended 4 Months Ended 8 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Apr. 30, 2019
Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Share-based compensation expense $ 4.8 $ 4.4    
Related tax benefits 0.7 0.7    
Income tax benefit $ 0.6 $ 1.9    
PBRSUs        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Maximum exercisable (in shares) 9,007,166      
PBRSUs | Minimum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares vesting if targets conditions met, potential percentage     0.00% 0.00%
PBRSUs | Maximum        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares vesting if targets conditions met, potential percentage     350.00% 200.00%