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Share-Based Compensation - Summary of Option Activity Under 2013 Plan (Details) - Option Activity Under the 2013 Plan $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2021 USD ($) $ / shares shares
Shares
Outstanding, beginning of year (in shares) | shares	305,362
Granted (in shares) | shares	0
Exercised (in shares) | shares	(104,484)
Forfeited (in shares) | shares	0
Outstanding, end of year (in shares) | shares	200,878
Exercisable, end of year (in shares) | shares	188,888
Weighted– Average Exercise Price
Outstanding, beginning of year (in dollars per share) | $ / shares	$ 12.52
Granted (in dollars per share) | $ / shares	0
Exercised (in dollars per share) | $ / shares	10.45
Forfeited (in dollars per share) | $ / shares	0
Outstanding, end of year (in dollars per share) | $ / shares	14.46
Exercisable, end of year (in dollars per share) | $ / shares	$ 14.32
Outstanding, Weighted Average Remaining Contractual Term	4 years 11 months 12 days
Exercisable, Weighted Average Remaining Contractual Term	4 years 9 months 21 days
Outstanding, Aggregate Intrinsic Value | $	$ 1,283,614
Exercisable, Aggregate Intrinsic Value | $	$ 1,234,355

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

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Amount of difference between fair value of the underlying shares reserved for issuance and exercise price of vested portions of options outstanding and currently exercisable.

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Weighted average remaining contractual term for vested portions of options outstanding and currently exercisable or convertible, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

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

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