SECURITIES - Amortized Cost and Fair Value of Securities with Gross Unrealized Gains and Losses (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
SECURITIES [Abstract]
Amortized Cost	$ 622,293	$ 637,577
Gross unrealized gains	916	595
Gross unrealized losses	(67,782)	(70,632)
Allowance for credit losses	0	0
Fair value	555,427	567,540
State and Municipal [Member]
SECURITIES [Abstract]
Amortized Cost	197,674	199,417
Gross unrealized gains	554	388
Gross unrealized losses	(20,442)	(23,500)
Allowance for credit losses	0	0
Fair value	177,786	176,305
Residential Mortgage-backed Securities [Member]
SECURITIES [Abstract]
Amortized Cost	288,743	302,711
Gross unrealized gains	107	130
Gross unrealized losses	(41,857)	(42,081)
Allowance for credit losses	0	0
Fair value	246,993	260,760
Commercial Mortgage-backed Securities [Member]
SECURITIES [Abstract]
Amortized Cost	50,587	48,769
Gross unrealized gains	0	0
Gross unrealized losses	(4,302)	(3,983)
Allowance for credit losses	0	0
Fair value	46,285	44,786
Commercial Collateralized Mortgage Obligations [Member]
SECURITIES [Abstract]
Amortized Cost	66,689	67,708
Gross unrealized gains	4	77
Gross unrealized losses	(168)	(188)
Allowance for credit losses	0	0
Fair value	66,525	67,597
Asset-backed and Other Amortizing Securities [Member]
SECURITIES [Abstract]
Amortized Cost	13,001	13,972
Gross unrealized gains	0	0
Gross unrealized losses	(951)	(840)
Allowance for credit losses	0	0
Fair value	12,050	13,132
Other Securities [Member]
SECURITIES [Abstract]
Amortized Cost	5,599	5,000
Gross unrealized gains	251	0
Gross unrealized losses	(62)	(40)
Allowance for credit losses	0	0
Fair value	$ 5,788	$ 4,960