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Employee Benefit Plan - Additional Information (Detail) - USD ($) | 12 Months Ended
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Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Compensation And Retirement Disclosure [Abstract] |  |  |
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 | $ 1,900,000 | $ 1,600,000 | $ 2,900,000

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- Definition Annual maximum contribution to participant 401k plan. + References No definition available. + Details
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- References No definition available. + Details
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- Definition Amount of discretionary contributions made by an employer to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage of employees' gross pay for which the employer contributes a matching contribution to a defined contribution plan. + References No definition available. + Details
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- Definition Percentage employer matches of the employee's percentage contribution matched. + References No definition available. + Details
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- Definition Maximum percentage of employee gross pay the employee may contribute to a defined contribution plan. + References No definition available. + Details
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