EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended		9 Months Ended
	Sep. 30, 2021	Sep. 30, 2020	Jun. 30, 2021	Jun. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Earnings Per Share [Abstract]
Net income	$ 11,028	$ 8,402	$ 18,505	$ 16,202	$ 29,533	$ 24,604
Average number of basic common shares outstanding (in shares)	14,982,766	15,079,413			14,960,753	15,358,803
Plus: dilutive effect of stock options and awards outstanding (in shares)	67,990	23,421			73,829	23,063
Average number of diluted common shares outstanding (in shares)	15,050,756	15,102,834			15,034,582	15,381,866
Earnings per share:
Basic (in dollars per share)	$ 0.74	$ 0.56			$ 1.97	$ 1.60
Diluted (in dollars per share)	$ 0.73	$ 0.56			$ 1.96	$ 1.60