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SHARE-BASED COMPENSATION PLANS - Non-vested stock options (Details) - $ / shares	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020
Non Vested Stock Options [Member]
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Outstanding at beginning of year	485,371	473,740
Number of Options, Granted	186,900	188,600
Number of Options, Vested	(137,180)	(165,824)
Number of Options, Forfeited	(23,780)	(11,145)
Number of Options, Outstanding at end of year	511,311	485,371
Weighted Average Exercise Price, Outstanding at beginning of year (in dollars per share)	$ 24.08	$ 27.77
Weighted Average Exercise Price, Granted (in dollars per share)	24.00	18.00
Weighted Average Exercise Price, Vested (in dollars per share)	25.65	27.48
Weighted Average Exercise Price, Forfeited (in dollars per share)	23.97	27.54
Weighted Average Exercise Price, Outstanding at end of year (in dollars per share)	23.63	24.08
Weighted Average Fair Value, Outstanding at beginning of year (in dollars per share)	3.48	4.26
Weighted Average Fair Value, Granted (in dollars per share)	4.16	2.01
Weighted Average Fair Value, Vested (in dollars per share)	3.83	3.99
Weighted Average Fair Value, Forfeited (in dollars per share)	3.48	4.27
Weighted Average Fair Value, Outstanding at end of the year (in dollars per share)	$ 3.64	$ 3.48
Employee Stock Option
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Number of Options, Granted	186,900	188,600
Weighted Average Exercise Price, Granted (in dollars per share)	$ 24.00	$ 18.00
Weighted Average Fair Value, Granted (in dollars per share)	$ 4.16	$ 2.01

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (d)(1)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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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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Weighted average price at which grantees can acquire the shares reserved for issuance under the non-vested stock option plan.

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