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Stock-Based Compensation - Textual (Details)
$ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Mar. 31, 2010
shares
Mar. 31, 2018
USD ($)
Jun. 30, 2017
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
shares
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   $ 4.6        
Stock options [Member] | Performance Goal: Threshold Level [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting rights 75.00%          
Stock options [Member] | Performance Goal: Superior Level [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting rights 25.00%          
Restricted Stock Units (RSUs) [Member] | Performance Goal: Threshold Level [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period 3 years          
Award vesting rights 33.3333%          
Restricted Stock Units (RSUs) [Member] | Performance Goal: Target Level [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting period 4 years          
Award vesting rights 25.00%          
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   1.3        
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   $ 3.5        
Minimum [Member] | Incentive Stock Options [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Purchase price of common stock 100.00%          
Minimum [Member] | Non-Statutory Stock Options [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Purchase price of common stock 85.00%          
2010 Plan [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Shares reserved for future issuance (shares) | shares 1,100,000          
2016 PSU Plan [Member] | Performance Shares [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting rights     50.00% 50.00%    
Future vesting rights percentage   50.00%        
Estimated performance goal achievement rate   142.30%       100.00%
PBOs granted in period (shares) | shares           0
2016 PSU Plan [Member] | Performance Shares [Member] | Second Year Vesting Period [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Future vesting rights percentage   50.00%        
2016 PSU Plan [Member] | Minimum [Member] | Performance Shares [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance awards, threshold level, number of shares, multiplier       0    
2015 PSU Plan [Member] | Performance Shares [Member] | Second Year Vesting Period [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Future vesting rights percentage   50.00%        
2015 PSU Plan [Member] | Performance Stock Units (PSUs) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Award vesting rights       50.00% 50.00%  
2017 PSU and PBO Plan [Member] | Performance Shares [Member] | Second Year Vesting Period [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Future vesting rights percentage   50.00%        
2017 PSU and PBO Plan [Member] | Performance Based Options (PBOs) [Member] | Second Year Vesting Period [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] | Minimum [Member] | Performance Stock Units (PSUs) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance awards, threshold level, number of shares, multiplier       0    
2017 PSU and PBO Plan [Member] | Minimum [Member] | Performance Based Options (PBOs) [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance awards, threshold level, number of shares, multiplier       0    
2017 PSU Plan [Member] | Maximum [Member] | Performance Shares [Member] | Performance Goal: Threshold Level [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance awards, threshold level, number of shares, multiplier   0.5        
2017 PSU Plan [Member] | Maximum [Member] | Performance Shares [Member] | Performance Goal: Target Level [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance awards, threshold level, number of shares, multiplier   1        
2017 PSU Plan [Member] | Maximum [Member] | Performance Shares [Member] | Performance Goal: Superior Level [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance awards, threshold level, number of shares, multiplier   2        
2017 PBO Plan [Member] | Maximum [Member] | Performance Shares [Member] | Performance Goal: Threshold Level [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance awards, threshold level, number of shares, multiplier   0.25        
2017 PBO Plan [Member] | Maximum [Member] | Performance Shares [Member] | Performance Goal: Target Level [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance awards, threshold level, number of shares, multiplier   0.5        
2017 PBO Plan [Member] | Maximum [Member] | Performance Shares [Member] | Performance Goal: Superior Level [Member]            
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]            
Performance awards, threshold level, number of shares, multiplier   1