Stock Plans and Stock-Based Compensation - Stock Options - Additional Information (Details) - USD ($) $ in Thousands	3 Months Ended
Mar. 31, 2021	Mar. 31, 2020
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock-based compensation expense	$ 12,685	$ 10,310
Intrinsic value of options exercised	6,300	9,200
Intrinsic value of all outstanding options	21,500	47,100
Total unrecognized compensation cost	900
Proceeds from stock option exercises	$ 1,604	$ 2,989
Stock Options
Share Based Compensation Arrangement By Share Based Payment Award [Line Items]
Stock options vesting period	4 years
Stock options expiration period	10 years
Stock options granted	0	0
Stock-based compensation expense	$ 400	$ 900
Weighted-average amortization period	9 months 18 days

Amount of expense for award under share-based payment arrangement. Excludes amount capitalized.

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Amount of cost to be recognized for option under share-based payment arrangement.

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Amount of cash inflow from exercise of option under share-based payment arrangement.

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Period from grant date that an equity-based award expires, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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