Stockholders' Equity - Narrative (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common stock, shares authorized (in shares)	200,000,000	200,000,000
Common stock, shares issued (in shares)	74,980,546	70,264,265
Common stock, shares outstanding (in shares)	72,234,303	67,554,435
Common stock, par value (in dollars per share)	$ 0.001	$ 0.001
Preferred stock, shares authorized (in shares)	5,000,000	5,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Preferred stock, par value (in dollars per share)	$ 0.001	$ 0.001
Accrual during period for cash awards related to bonus	$ 18,400	$ 20,400
Accrual during period for cash awards related to achievement of long-term incentive plan awards		8,900
Stock-based compensation expense	$ 69,656	$ 65,946	$ 44,105
Weighted average fair value of stock options granted (in dollars per share)	$ 28.68	$ 13.84	$ 12.12
Dividend yield	0.00%	0.00%	0.00%
Expected life (in years)	5 years	5 years	5 years
Stock option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Common Stock, Increase In Shares Authorized During The Period	5,000,000
Shares of common stock available for issuance (up to)	40,067,744
Stock option term (in years)	10 years
Shares reserved for future issuance	5,000,000
Fair value of stock options exercised	$ 6,600	$ 10,000
Unrecognized compensation cost related to nonvested share-based compensation arrangements	$ 44,800
Weighted average recognition period of unrecognized compensation cost	2 years 8 months 12 days
Employee Stock Purchase Plan
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock available for issuance (up to)	1,000,000
Shares reserved for future issuance	700,000
Incentive Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares of common stock available for issuance (up to)	3,368,048
Shares reserved for future issuance	0
Restricted stock units
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Weighted average recognition period of unrecognized compensation cost	3 years 2 months 12 days
Unrecognized compensation cost - RSU	$ 141,900
Restricted stock units \| Minimum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	3 years
Restricted stock units \| Maximum
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Vesting period (in years)	4 years

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Share-Based Compensation, Accrual For Cash Awards To Be Settled In Stock, Achievement Of Incentive Plan Awards

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Amount of cost to be recognized for nonvested award under share-based payment arrangement. Excludes share and unit options.

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Face amount or stated value per share of preferred stock nonredeemable or redeemable solely at the option of the issuer.

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The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

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The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

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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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Expected term of award under share-based payment arrangement, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days.

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