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Stock-Based Compensation - Textual (Details)
$ in Millions
1 Months Ended 6 Months Ended
Mar. 31, 2010
Jun. 30, 2019
USD ($)
installment
shares
Mar. 31, 2019
Mar. 31, 2018
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of installments | installment   2    
Incentive Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Purchase price of common stock 100.00%      
Non-Statutory Stock Options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Purchase price of common stock 85.00%      
Stock options [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Percent of voting interests 10.00%      
Purchase price of common stock above minimum threshold 110.00%      
Expiration period 10 years      
Award vesting period 4 years      
Compensation not yet recognized, stock options   $ 5.2    
Stock options [Member] | Tranche One [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights 25.00%      
Stock options [Member] | Tranche Two [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights 75.00%      
Restricted Stock Units (RSUs) [Member] | Tranche One [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period 3 years      
Award vesting rights 33.33333%      
Restricted Stock Units (RSUs) [Member] | Tranche Two [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting period 4 years      
Award vesting rights 25.00%      
Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Performance awards, threshold level, number of shares, multiplier   0    
Performance Shares [Member] | Tranche One [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Future vesting rights, percentage   50.00%    
Performance Shares [Member] | Tranche Two [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Future vesting rights, percentage   50.00%    
RSAs and RSUs [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation not yet recognized, share-based awards other than options   $ 1.4    
Performance Stock Units (PSUs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation not yet recognized, share-based awards other than options   1.1    
Performance Based Options (PBOs) [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Compensation not yet recognized, share-based awards other than options   $ 3.1    
2019 Plan [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Number of shares available for grant (in shares) | shares   7,897,144    
Maximum number of shares to be issued upon exercise of stock options (in shares) | shares   14,000,000    
Number of shares authorized (in shares) | shares   8,100,000    
2019 PSU and PBO Plan [Member] | Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Estimated performance goal achievement rate   106.00%    
2018 PSU and PBO Plan [Member] | Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Estimated performance goal achievement rate     118.00%  
2018 PSU and PBO Plan [Member] | Performance Shares [Member] | Tranche One [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights 50.00%      
2018 PSU and PBO Plan [Member] | Performance Shares [Member] | Tranche Two [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights 50.00%      
2017 PSU and PBO Plan [Member] | Performance Shares [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Estimated performance goal achievement rate       134.20%
2017 PSU and PBO Plan [Member] | Performance Shares [Member] | Tranche One [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights 50.00%      
2017 PSU and PBO Plan [Member] | Performance Shares [Member] | Tranche Two [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights 50.00%      
2016 PSU Plan [Member] | Performance Shares [Member] | Tranche One [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights 50.00%      
2016 PSU Plan [Member] | Performance Shares [Member] | Tranche Two [Member]        
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]        
Award vesting rights 50.00%