EQUITY AWARDS - Schedule of Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Number of Shares
Outstanding at beginning of year (in shares)	508,000	537,872
Granted (in shares)	74,000	39,000
Exercised (in shares)	(26,600)	(37,672)
Forfeited (in shares)	(49,200)	(31,200)
Balance (in shares)	506,200	508,000	537,872
Exercisable
Outstanding (in shares)	291,520	256,880
Weighted-average exercise price (in USD per share)	$ 25.63	$ 25.21
Weighted-average remaining contractual life in years	4 years 8 months 26 days	5 years 2 months 4 days
Aggregate intrinsic value	$ 1,339	$ 1,971
Weighted-Average Exercise Price
Outstanding at beginning of year (in USD per share)	$ 26.68	$ 26.49
Granted (in USD per share)	28.67	29.89
Exercised (in USD per share)	24.00	24.55
Forfeited (in USD per share)	29.71	30.04
Balance (in USD per share)	$ 26.81	$ 26.68	$ 26.49
Weighted-Average Remaining Contractual Life in Years
Outstanding	5 years 9 months 25 days	6 years 2 months 26 days	6 years 11 months 19 days
Granted	9 years 6 months 25 days	9 years 4 months 24 days
Exercised	1 year 9 months 14 days	4 years 1 month 9 days
Forfeited	7 years 6 months 29 days	8 years 7 days
Aggregate Intrinsic Value
Outstanding	$ 3,159	$ 2,088
Granted	145	117
Exercised	158	314	$ 102
Forfeited	84	89
Outstanding	$ 1,805	$ 3,159	$ 2,088