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Share-Based Compensation Share-Based Compensation Plans - Summary of Stock Option Activity (Details) $ / shares in Units, shares in Thousands, $ in Thousands	3 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
Number of Shares
Beginning Blance Stock options outstanding (in shares) | shares	205
Exercised (in shares) | shares	(190)
Forfeited, canceled or expired (in shares) | shares	0
Ending Balance Stock options outstanding (in shares) | shares	15
Options vested and expected to vest (in shares) | shares	15
Weighted-Average Exercise Price per Share
Beginning Balance weighted-average exercise price per share (in usd per share) | $ / shares	$ 14.29
Exercised (in dollars per share) | $ / shares	14.15
Forfeited, canceled or expired (in dollars per share) | $ / shares	0
Ending Balance weighted-average exercise price per share (in usd per share) | $ / shares	16.06
Options vested and expected to vest (in dollars per share) | $ / shares	$ 16.06
Share-based Compensation Arrangement by Share-based Payment Award, Options, Additional Disclosures [Abstract]
Weighted average remaining contractual term options outstanding	3 years 10 months 6 days
Aggregate intrinsic value stock options outstanding | $	$ 934
Weighted average remaining contractual term options vested and expected to vest	3 years 10 months 6 days
Aggregate intrinsic value of options vested and expected to vest | $	$ 934

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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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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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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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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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Weighted-average exercise price, at which grantee can acquire shares reserved for issuance, for 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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Weighted average price at which option holders acquired shares when converting their stock options into shares.

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Weighted average remaining contractual term for option awards outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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Weighted average remaining contractual term for fully vested and expected to vest options outstanding, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents reported fact of one year, five months, and thirteen days. 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 share options (or share units) exercised during the current period.

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