SECURITIES - Securities with Unrealized Losses Segregated by the Period in a Loss Position (Details) - USD ($) $ in Thousands	Jun. 30, 2026	Dec. 31, 2025
SECURITIES [Abstract]
Less than 12 months, Fair Value	$ 75,044	$ 70,050
Less than 12 months, Unrealized Loss	417	243
12 months or more, Fair Value	454,805	474,705
12 months or more, Unrealized Loss	67,365	70,389
Total, Fair Value	529,849	544,755
Total, Unrealized Loss	67,782	70,632
State and Municipal [Member]
SECURITIES [Abstract]
Less than 12 months, Fair Value	277	205
Less than 12 months, Unrealized Loss	1	0
12 months or more, Fair Value	166,348	165,618
12 months or more, Unrealized Loss	20,441	23,500
Total, Fair Value	166,625	165,823
Total, Unrealized Loss	20,442	23,500
Residential Mortgage-backed Securities [Member]
SECURITIES [Abstract]
Less than 12 months, Fair Value	3,806	3,132
Less than 12 months, Unrealized Loss	89	48
12 months or more, Fair Value	236,040	249,710
12 months or more, Unrealized Loss	41,768	42,033
Total, Fair Value	239,846	252,842
Total, Unrealized Loss	41,857	42,081
Commercial Mortgage-backed Securities [Member]
SECURITIES [Abstract]
Less than 12 months, Fair Value	5,918	3,503
Less than 12 months, Unrealized Loss	97	7
12 months or more, Fair Value	40,367	41,284
12 months or more, Unrealized Loss	4,205	3,976
Total, Fair Value	46,285	44,787
Total, Unrealized Loss	4,302	3,983
Commercial Collateralized Mortgage Obligations [Member]
SECURITIES [Abstract]
Less than 12 months, Fair Value	62,708	63,210
Less than 12 months, Unrealized Loss	168	188
12 months or more, Fair Value	0	0
12 months or more, Unrealized Loss	0	0
Total, Fair Value	62,708	63,210
Total, Unrealized Loss	168	188
Asset-backed and Other Amortizing Securities [Member]
SECURITIES [Abstract]
Less than 12 months, Fair Value	0	0
Less than 12 months, Unrealized Loss	0	0
12 months or more, Fair Value	12,050	13,132
12 months or more, Unrealized Loss	951	840
Total, Fair Value	12,050	13,132
Total, Unrealized Loss	951	840
Other Securities [Member]
SECURITIES [Abstract]
Less than 12 months, Fair Value	2,335	0
Less than 12 months, Unrealized Loss	62	0
12 months or more, Fair Value	0	4,961
12 months or more, Unrealized Loss	0	40
Total, Fair Value	2,335	4,961
Total, Unrealized Loss	$ 62	$ 40