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Equity-Based Compensation - Restricted Stock Awards with Market Conditions Additional Information (Detail) - Restricted stock
$ / shares in Units, $ in Millions
1 Months Ended 3 Months Ended 12 Months Ended
Feb. 28, 2014
trading_day
$ / shares
shares
Mar. 31, 2017
USD ($)
shares
Mar. 31, 2016
USD ($)
shares
Dec. 31, 2011
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of shares granted (in shares)   286,256 434,283  
Number of shares, forfeited (in shares)   167,712 588,819  
2014 Management Market-Based Awards        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of shares granted (in shares) 1,277,500     366,666
Share-based payment award, threshold, number of trading days | trading_day 45      
Vesting percentage 25.00%      
Number of shares, forfeited (in shares)   20,000    
2014 Management Market-Based Awards | Tranche one        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Volume weighted average price targets (in dollars per share) | $ / shares $ 28.07      
2014 Management Market-Based Awards | Tranche two        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Volume weighted average price targets (in dollars per share) | $ / shares 30.16      
2014 Management Market-Based Awards | Tranche three        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Volume weighted average price targets (in dollars per share) | $ / shares 32.38      
2014 Management Market-Based Awards | Tranche four        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Volume weighted average price targets (in dollars per share) | $ / shares $ 34.71      
2014 Employee Market-Based Awards        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Number of shares granted (in shares)   90,800    
Share-based payment award, threshold, number of trading days | trading_day 45      
Number of shares, forfeited (in shares)   12,600    
2014 Management and Employee Market Based Awards        
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]        
Share based compensation expense | $   $ 0.1 $ 0.8