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Equity-Based Compensation - Restricted Stock Awards with Market Conditions Additional Information (Detail)
$ / shares in Units, $ in Thousands
1 Months Ended 3 Months Ended 6 Months Ended 12 Months Ended
Feb. 28, 2014
trading_day
$ / shares
shares
Jun. 30, 2016
USD ($)
shares
Mar. 31, 2016
shares
Jun. 30, 2015
USD ($)
shares
Mar. 31, 2015
shares
Jun. 30, 2016
USD ($)
trading_day
Jun. 30, 2015
USD ($)
Dec. 31, 2011
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Unrecognized equity-based compensation | $   $ 25,841   $ 43,891   $ 25,841 $ 43,891  
Restricted Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of shares, granted   112,397 434,283 140,416 441,256      
Number of shares, forfeited   7,500 588,819   43,660      
2011 Executive Performance-Based Awards | Restricted Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of shares, granted               366,666
2014 Management Market-Based Awards | Restricted Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of shares, granted 1,277,500              
Share-based payment award, threshold, number of trading days | trading_day 45              
Vesting percentage 25.00%              
2014 Management Market-Based Awards | Restricted Stock | 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 | Restricted Stock | 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 | Restricted Stock | 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 | Restricted Stock | 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 | Restricted Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of shares, granted   90,800            
Share-based payment award, threshold, number of trading days | trading_day           45    
Number of shares, forfeited   12,600            
2014 Management and Employee Market Based Awards | Restricted Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Share based compensation expense | $   $ 100   $ 2,600   $ 800 $ 5,300  
Unrecognized equity-based compensation | $   $ 100       $ 100