EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended								12 Months Ended
	Dec. 31, 2024	Sep. 30, 2024	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Basic earnings per common share:
Net income	$ 24,190	$ 23,338	$ 22,549	$ 23,401	$ 29,626	$ 25,252	$ 14,611	$ 24,278	$ 93,478	$ 93,767	$ 103,817
Weighted-average common shares outstanding (in shares)									25,676,543	25,604,751	25,528,328
Basic earnings per common share (in USD per share)	$ 0.94	$ 0.91	$ 0.88	$ 0.91	$ 1.16	$ 0.99	$ 0.57	$ 0.95	$ 3.64	$ 3.67	$ 4.07
Diluted earnings per common share:
Net income	$ 24,190	$ 23,338	$ 22,549	$ 23,401	$ 29,626	$ 25,252	$ 14,611	$ 24,278	$ 93,478	$ 93,767	$ 103,817
Weighted-average common shares outstanding for basic earnings per common share (in shares)									25,676,543	25,604,751	25,528,328
Add: Dilutive effect of assumed exercises of stock options and awards (in shares)									92,475	118,414	184,210
Average shares and dilutive potential common shares (in shares)									25,769,018	25,723,165	25,712,538
Diluted earnings per common share (in USD per share)	$ 0.94	$ 0.91	$ 0.87	$ 0.91	$ 1.16	$ 0.98	$ 0.57	$ 0.94	$ 3.63	$ 3.65	$ 4.04
Number of antidilutive stock options (in shares)									0	0	0