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Equity-Based Compensation - Additional Information (Detail) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Authorized common stock 4,700,000    
Equity incentive plan available for future grant 1,921,673    
Annual increments in employee grants 25.00%    
Stock options, contractual term 10 years    
Equity-based compensation expense $ 20,472 $ 10,058 $ 5,249
Unrecognized compensation expense related to unvested options $ 47,900    
Vesting period 1 year 4 months 24 days    
Warrants outstanding and exercisable 0    
Deferred income tax benefit $ 43,613 7,215 10,083
Tax realized from stock options exercised 300 4,600 $ 1,800
Stock Compensation Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Deferred income tax benefit $ (8,400) $ (4,100)