STOCK OPTIONS - Schedule of Option Activity (Details) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Number of Shares
Outstanding at beginning of year (in shares)	537,872	469,044
Granted (in shares)	39,000	101,000
Exercised (in shares)	(37,672)	(14,372)
Forfeited (in shares)	(31,200)	(17,800)
Balance (in shares)	508,000	537,872	469,044
Exercisable
Outstanding (in shares)	256,880	206,312
Weighted-average exercise price (in USD per share)	$ 25.21	$ 24.48
Weighted-average remaining contractual life in years	5 years 2 months 4 days	5 years 7 months 24 days
Aggregate intrinsic value	$ 1,971	$ 1,113
Weighted-Average Exercise Price
Outstanding at beginning of year (in USD per share)	$ 26.49	$ 25.11
Granted (in USD per share)	29.89	32.29
Exercised (in USD per share)	24.55	22.74
Forfeited (in USD per share)	30.04	26.07
Balance (in USD per share)	$ 26.68	$ 26.49	$ 25.11
Weighted-Average Remaining Contractual Life in Years
Outstanding	6 years 2 months 26 days	6 years 11 months 19 days	7 years 3 months 25 days
Granted	9 years 4 months 24 days	9 years 6 months 3 days
Exercised	4 years 1 month 9 days	4 years 3 months 29 days
Forfeited	8 years 7 days	6 years 8 months 15 days
Aggregate Intrinsic Value
Outstanding	$ 2,088	$ 2,623
Granted	117	5
Exercised	314	102	$ 132
Forfeited	89	96
Outstanding	$ 3,159	$ 2,088	$ 2,623