Employee Stock Plans - Schedule of Stock Options Award Activity (Details) - $ / shares shares in Thousands	6 Months Ended
Jun. 30, 2021
Stock Option Activity
Outstanding at beginning of period (in shares)	1,820
Granted (in shares)	0
Exercised or released (in shares)	(493)
Expired or canceled (in shares)	0
Outstanding at end of period (in shares)	1,327
Exercisable at end of period (in shares)	1,179
Stock Option Weighted Average Exercise Price Per Share
Outstanding at beginning of period (in dollars per share)	$ 15.02
Granted (in dollars per share)	0
Exercised or released (in dollars per share)	11.05
Expired or canceled (in dollars per share)	0
Outstanding at end of period (in dollars per share)	16.50
Exercisable at end of period (in dollars per share)	$ 16.13

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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For presentations that combine terminations, 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 or that expired.

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

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No definition available.

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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 of the plan that expired.

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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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