EQUITY AWARDS - Schedule of Nonvested 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)	251,120	331,560
Granted (in shares)	74,000	39,000
Vested (in shares)	(71,040)	(91,040)
Forfeited (in shares)	(39,400)	(28,400)
Balance (in shares)	214,680	251,120	331,560
Weighted-Average Exercise Price
Outstanding at beginning of year (in USD per share)	$ 28.18	$ 27.74
Granted (in USD per share)	28.67	29.89
Vested (in USD per share)	27.26	26.71
Forfeited (in USD per share)	29.71	33.00
Balance (in USD per share)	$ 28.42	$ 28.18	$ 27.74
Weighted-Average Remaining Contractual Life in Years
Outstanding	7 years 3 months 10 days	7 years 3 months 21 days	7 years 9 months 7 days
Granted	9 years 6 months 25 days	9 years 4 months 24 days
Vested	6 years	6 years 7 days
Forfeited	7 years 6 months 29 days	8 years 9 months 21 days
Aggregate Intrinsic Value
Outstanding	$ 1,188	$ 975
Granted	145	117
Vested	230	563
Forfeited	84	89
Outstanding	$ 466	$ 1,188	$ 975