EQUITY AWARDS - Schedule of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Dec. 31, 2021	Dec. 31, 2020
Number of Shares
Outstanding at beginning of year (in shares)	502,780	506,200	506,200
Effect of 10% stock dividend (in shares)		50,770
Granted (in shares)	39,000	24,500
Exercised (in shares)	0	(24,250)
Forfeited (in shares)	(5,060)	(10,000)
Balance (in shares)	536,720	547,220	502,780	506,200
Exercisable
Outstanding (in shares)	307,086	296,922
Weighted-average exercise price (in USD per share)	$ 24.30	$ 23.49
Weighted-average remaining contractual life in years	4 years 3 months 10 days	4 years 7 months 20 days
Aggregate intrinsic value	$ 3,285	$ 3,938
Weighted-Average Exercise Price
Outstanding at beginning of year (in USD per share)	$ 25.77	$ 26.81	$ 26.81
Granted (in USD per share)	35.89	33.37
Exercised (in USD per share)		21.74
Forfeited (in USD per share)	26.92	28.54
Balance (in USD per share)	$ 26.50	$ 24.81	$ 25.77	$ 26.81
Weighted-Average Remaining Contractual Life in Years
Outstanding	5 years 7 months 24 days	5 years 10 months 17 days	5 years 7 months 2 days	5 years 9 months 25 days
Aggregate Intrinsic Value
Outstanding	$ 5,936	$ 1,805	$ 1,805
Exercised	0	364
Outstanding	$ 4,626	$ 6,532	$ 5,936	$ 1,805