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Stock-Based Compensation - Additional Information (Detail) (USD $)
In Thousands, except Share data, unless otherwise specified
6 Months Ended
Jun. 30, 2014
Restricted Stock Awards and Restricted Stock Units
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Unrecognized compensation expense $ 35,445
Remaining weighted average term over which unamortized compensation expense will be recognized 1 year 3 months 18 days
Service Based Restricted Stock Awards
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share based compensation arrangement by share based payment award granted in period 191,115
Description of vesting date The RSUs vest in various increments on the anniversaries of the individual grant dates, through June 4, 2018, subject to the recipient's continued employment or service through each applicable vesting date.
Service Based Restricted Stock Awards | Maximum
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Vesting date Jun. 04, 2018
Performance Based Restricted Stock Units
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Share based compensation arrangement by share based payment award granted in period 35,000