EARNINGS PER COMMON SHARE - Schedule of Computation of Basic and Diluted Earnings Per Share (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Basic earnings per common share computation:
Net income per condensed consolidated statements of income	$ 12,878	$ 12,651	$ 36,285	$ 40,817
Net earnings allocated to participating securities	(101)	(70)	(291)	(222)
Net earnings allocated to common stock	$ 12,777	$ 12,581	$ 35,994	$ 40,595
Weighted average common shares outstanding, including shares considered participating securities (in shares)	20,997,000	20,969,000	20,994,000	21,048,000
Less: Average participating securities (in shares)	(155,000)	(109,000)	(162,000)	(109,000)
Weighted average shares (in shares)	20,841,808	20,859,872	20,832,064	20,939,102
Basic earnings per common share (in dollar per share)	$ 0.61	$ 0.60	$ 1.73	$ 1.94
Diluted earnings per common share computation:
Net earnings allocated to common stock	$ 12,777	$ 12,581	$ 35,994	$ 40,595
Weighted average common shares outstanding for basic earnings per common share (in shares)	20,841,808	20,859,872	20,832,064	20,939,102
Add: Dilutive effects of stock compensation (in shares)	70,000	40,000	64,000	40,000
Weighted average shares and dilutive potential common shares (in shares)	20,911,862	20,899,744	20,895,538	20,979,032
Diluted earnings per common share (in dollar per share)	$ 0.61	$ 0.60	$ 1.72	$ 1.94
Distributed earnings allocated to common stock
Basic earnings per common share computation:
Net earnings allocated to common stock	$ 3,746	$ 3,645	$ 11,036	$ 10,969
Undistributed earnings allocated to common stock
Basic earnings per common share computation:
Net earnings allocated to common stock	$ 9,031	$ 8,936	$ 24,958	$ 29,626