EQUITY AWARDS - Schedule of Stock Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		12 Months Ended
	Mar. 31, 2024	Mar. 31, 2023	Dec. 31, 2023	Dec. 31, 2022
Number of Shares
Outstanding at beginning of year (in shares)	465,680	497,820	497,820
Granted (in shares)	2,500	15,500
Exercised (in shares)	(3,300)	(8,800)
Forfeited (in shares)	(10,500)	(15,440)
Balance (in shares)	454,380	489,080	465,680	497,820
Exercisable
Outstanding (in shares)	294,880	281,500
Weighted-average exercise price (in USD per share)	$ 26.28	$ 25.57
Weighted-average remaining contractual life in years	3 years 9 months 7 days	4 years 3 months 3 days
Aggregate intrinsic value	$ 1,378	$ 850
Weighted-Average Exercise Price
Outstanding at beginning of year (in USD per share)	$ 28.12	$ 28.07	$ 28.07
Granted (in USD per share)	30.49	29.91
Exercised (in USD per share)	20.91	25.57
Forfeited (in USD per share)	34.84	30.42
Balance (in USD per share)	$ 28.03	$ 28.1	$ 28.12	$ 28.07
Weighted-Average Remaining Contractual Life in Years
Outstanding	5 years 2 months 12 days	5 years 9 months 7 days	5 years 5 months 15 days	5 years 10 months 13 days
Aggregate Intrinsic Value
Outstanding	$ 2,782	$ 3,402	$ 3,402
Outstanding	$ 1,632	$ 1,037	$ 2,782	$ 3,402