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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 12 Months Ended
Nov. 30, 2015
Apr. 30, 2014
trading_day
shares
Feb. 28, 2014
trading_day
$ / shares
shares
Mar. 31, 2016
USD ($)
shares
Mar. 31, 2015
USD ($)
shares
Dec. 31, 2015
trading_day
shares
Dec. 31, 2014
shares
Dec. 31, 2011
shares
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of SARs outstanding (in shares)       479,656        
Unrecognized equity-based compensation | $       $ 28,983 $ 42,705      
Tranche One                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Vesting percentage 25.00%              
Tranche Two                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Vesting percentage       75.00%        
Restricted Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of SARs outstanding (in shares)       2,668,975 3,508,624 3,480,828 3,755,275  
Number of shares, forfeited (in shares)       588,819 43,660      
Number of shares, granted (in shares)       434,283 441,256      
2011 Executive Performance-Based Awards | Restricted Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of SARs outstanding (in shares)               366,666
2014 Management Market-Based Awards | Restricted Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of SARs outstanding (in shares)     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]                
Share-based payment award, threshold, number of trading days | trading_day   45       45    
Number of shares, forfeited (in shares)       12,600        
Number of shares, granted (in shares)   50,800            
2014 Management and Employee Market Based Awards | Restricted Stock                
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]                
Number of shares, granted (in shares)           20,000    
Share based compensation expense | $       $ 800 $ 2,600      
Unrecognized equity-based compensation | $       $ 100