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Stock-Based Compensation - Schedule of Stock Option Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Dec. 31, 2020 USD ($) $ / shares shares
Shares
Outstanding at beginning of period (in shares) | shares	892
Granted (in shares) | shares	262
Exercised (in shares) | shares	(96)
Forfeited (in shares) | shares	(15)
Outstanding at end of period (in shares) | shares	1,043
Exercisable (in shares) | shares	559
Vested and expected to vest (in shares) | shares	476
Weighted-Average Exercise Price
Outstanding at beginning of period (in dollars per share) | $ / shares	$ 115.82
Granted (in dollars per share) | $ / shares	109.66
Exercised (in dollars per share) | $ / shares	96.55
Forfeited or expired (in dollars per share) | $ / shares	138.52
Outstanding at end of period (in dollars per share) | $ / shares	115.72
Exercisable (in dollars per share) | $ / shares	110.49
Vested and expected to vest (in dollars per share) | $ / shares	$ 121.90
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual term, Outstanding	7 years 2 months 12 days
Weighted average remaining contractual term, Exercisable	6 years 4 months 24 days
Weighted average remaining contractual term, Vested and expected to vest	8 years 2 months 12 days
Aggregate Intrinsic Value, Outstanding | $	$ 91,603
Aggregate Intrinsic Value, Exercisable | $	52,036
Aggregate Intrinsic Value, Vested and expected to vest | $	$ 38,844

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The number of shares into which fully or partially vested stock options outstanding as of the balance sheet date can be currently converted under the option plan.

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The weighted-average price as of the balance sheet date at which grantees can acquire the shares reserved for issuance on vested portions of options outstanding and currently exercisable under the stock option plan.

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Weighted average price of options that were either forfeited or expired.

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Amount by which the current fair value of the underlying stock exceeds the exercise price of options outstanding.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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Amount by which current fair value of underlying stock exceeds exercise price of fully vested and expected to vest options outstanding. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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Number of fully vested and expected to vest options outstanding that can be converted into shares under option plan. Includes, but is not limited to, unvested options for which requisite service period has not been rendered but that are expected to vest based on achievement of performance condition, if forfeitures are recognized when they occur.

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