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SHARE-BASED COMPENSATION PLANS - Company's stock option activity (Details) - Employee Stock Option - USD ($)	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Shares, Outstanding at beginning of period	1,125,383	1,176,770
Shares, Granted	186,900	188,600
Shares, Exercised	(1,300)
Shares, Forfeited or expired	(31,150)	(239,987)
Shares, Outstanding at end of period	1,279,833	1,125,383
Shares, Exercisable at end of period	768,522	640,012
Weighted Average Exercise Price, Outstanding at beginning of period (in dollars per share)	$ 25.62	$ 27.14
Weighted Average Exercise Price, Granted (in dollars per share)	24.00	18.00
Weighted Average Exercise Price, Exercised (in dollars per share)	18.00
Weighted Average Exercise Price, Forfeited or expired (in dollars per share)	24.06	27.09
Weighted Average Exercise Price, Outstanding at end of period (in dollars per share)	25.44	25.62
Weighted Average Exercise Price, Exercisable at end of period (in dollars per share)	$ 26.58	$ 26.77
Weighted Average Remaining Contractual Term (Years), Outstanding - September 30, 2021	5 years 7 months 6 days
Weighted Average Remaining Contractual Term (Years), Exercisable, Outstanding - September 30, 2021	3 years 9 months 18 days
Aggregate Intrinsic Value, Outstanding at December 31, 2021	$ 1,147,000
Aggregate Intrinsic Value, Exercisable at December 31, 2021	$ 257,000

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

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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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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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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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