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Employee Benefit Plan - Additional Information (Detail) - USD ($)
 12 Months Ended
Dec. 31, 2015
Dec. 31, 2014
Dec. 31, 2013
Defined Contribution Plan Disclosure [Line Items]      
Maximum employee contribution to 401k 50.00%    
Employer match for first 6% contributed by plan participant 50.00%    
Maximum contribution by participant that employer will match at 50% 6.00%    
Maximum annual contribution by employer $ 3,000    
Employer contribution to the plan $ 1,600,000 $ 2,900,000 $ 2,700,000