EQUITY AWARDS - Schedule of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	9 Months Ended	12 Months Ended
	Sep. 30, 2020	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Number of Shares
Outstanding at beginning of year (in shares)	508,000	506,200	508,000
Effect of 10% stock dividend (in shares)		50,770
Granted (in shares)		58,000	74,000
Exercised (in shares)		(89,870)	(26,600)
Forfeited (in shares)		(22,320)	(49,200)
Balance (in shares)		502,780	506,200	508,000
Exercisable
Outstanding (in shares)		295,696	291,520
Weighted-average exercise price (in USD per share)		$ 24.09	$ 25.63
Weighted-average remaining contractual life in years		4 years 4 months 24 days	4 years 8 months 26 days
Aggregate intrinsic value		$ 3,989	$ 1,339
Weighted-Average Exercise Price
Outstanding at beginning of year (in USD per share)	$ 26.68	$ 26.81	$ 26.68
Granted (in USD per share)	28.67	34.30
Exercised (in USD per share)	24.00	22.47
Forfeited (in USD per share)	$ 29.71	26.16
Balance (in USD per share)		$ 25.77	$ 26.81	$ 26.68
Weighted-Average Remaining Contractual Life in Years
Outstanding		5 years 7 months 2 days	5 years 9 months 25 days	6 years 2 months 26 days
Granted		9 years 8 months 1 day	9 years 6 months 25 days
Exercised		3 years 3 months 21 days	1 year 9 months 14 days
Forfeited		6 years 11 months 15 days	7 years 6 months 29 days
Aggregate Intrinsic Value
Outstanding	$ 3,159	$ 1,805	$ 3,159
Granted		112	145
Exercised		1,273	158	$ 314
Forfeited		222	84
Outstanding		$ 5,936	$ 1,805	$ 3,159