Employee Benefit Plans - Stock Transactions - Stock Option Plans (Details) - USD ($)	3 Months Ended	12 Months Ended
Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021
Shares
Options Outstanding, beginning shares (in shares)	688,533
Options granted (in shares)	0
Options exercised (in shares)	(47,374)	(12,467)
Options forfeited, shares	(9,164)
Options Outstanding, ending shares (in shares)	631,995		688,533
Shares Exercisable	502,179
Weighted average exercise price
Weighted Average exercise Price: Options Outstanding, beginning (in usd per share)	$ 17.56
Weighted Average Exercise Price: Options exercised (in usd per share)	13.49
Weighted Average Exercise Price: Options forfeited (in usd per share)	19.62
Weighted Average exercise Price: Options Outstanding, ending (in usd per share)	17.83		$ 17.56
Weighted average exercise price, Options Exercisable (in dollars per share)	$ 17.36
Weighted Average Remaining Contractual Life (in years): Options Outstanding	6 years 6 months		6 years 7 months 6 days
Weighted Average Remaining Contractual Life (in years): Options Exercisable	6 years
Aggregate Intrinsic Value: Options Outstanding	$ 6,414,948		$ 5,986,666
Aggregate Intrinsic Value: Options Exercisable	$ 5,335,232

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

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