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Stock Incentive Plans - Additional Information (Detail) - USD ($) |  | 3 Months Ended
--- | --- | ---
Jan. 02, 2020 | Mar. 31, 2021 | Mar. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Total intrinsic value of options exercised |  | $ 9,100,000 | $ 700,000
Share-based compensation expense tax benefit recognized |  | 0 |
Share-based compensation expense capitalized |  | $ 0 |
2014 Employee Stock Purchase Plan |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Maximum portion of employee ESPP plan contribution |  | 15.00% |
Maximum value of employee purchased shares per calendar year |  | $ 25,000 |
Offering period for employee stock purchases |  | 6 months |
Applicable exercise date an offering period shall be equal to percentage of the lower of fair market value of common stock |  | 85.00% |
Issuance of common stock under ESPP (in shares) | 24,052 |  |
Aggregate proceeds from the issuance of shares | $ 800,000 |  |
Restricted Stock Units |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Intrinsic value of RSUs |  | $ 126,200,000 |
Total unrecognized compensation costs related to stock options and RSUs |  | $ 50,700,000 |
Stock options and RSUs expected weighted average period |  | 1 year 10 months 28 days |
Employee Stock Option |  |  |
Share-based Compensation Arrangement by Share-based Payment Award [Line Items] |  |  |
Stock options and RSUs expected weighted average period |  | 2 years 10 months 20 days |
Total fair value of options vested during period |  | $ 2,700,000 |
Total unrecognized compensation costs related to stock options |  | $ 25,200,000 |

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