Stockholders' Equity Stock-Based Compensation - Summary of Status of Stock Option Activity (Details) shares in Thousands	3 Months Ended
Mar. 31, 2020 $ / shares shares
Shares
Stock options outstanding, beginning (in shares) \| shares	944
Granted \| shares	121
Exercised \| shares	(65)
Stock options cancelled (in shares) \| shares	(12)
Stock options outstanding, ending (in shares) \| shares	988
Weighted-average exercise price per share
Stock options outstanding beginning, weighted average exercise price (in USD per share) \| $ / shares	$ 30.63
Stock options granted, weighted average exercise price (in USD per share) \| $ / shares	77.16
Share-based Compensation Arrangements by Share-based Payment Award, Options, Exercises in Period, Weighted Average Exercise Price \| $ / shares	21.26
Stock options cancelled, weighted average exercise price (in USD per share) \| $ / shares	43.34
Stock options outstanding ending, weighted average exercise price (in USD per share) \| $ / shares	$ 36.77

Share-based Compensation Arrangement by Share-based Payment Award, fair value weighted average [Roll Forward]

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- Definition

The number of shares under options that were cancelled during the reporting period as a result of occurrence of a terminating event specified in contractual agreements pertaining to the stock option plan.

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Gross number of share options (or share units) granted during the period.

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Number of options outstanding, including both vested and non-vested options.

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A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

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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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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average price at which grantees could have acquired the underlying shares with respect to stock options that were terminated.

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Weighted average per share amount at which grantees can acquire shares of common stock by exercise of options.

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Number of share options (or share units) exercised during the current period.

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