INVESTMENT SECURITIES - Gross Unrealized Gains (Losses) and Fair Value by Investment Category and Length of Time (Details) - USD ($) $ in Thousands	Dec. 31, 2023	Dec. 31, 2022
U.S. Government and agency securities
Investment securities
Fair value, less than twelve months	$ 0	$ 2,896
Gross unrealized losses, less than twelve months	0	(106)
Fair value, twelve months or greater	2,940	0
Gross unrealized losses, twelve months or greater	(60)	0
Fair value, total	2,940	2,896
Gross unrealized losses, total	(60)	(106)
Mortgage-backed securities
Investment securities
Fair value, less than twelve months	7,559	0
Gross unrealized losses, less than twelve months	(78)	0
Fair value, twelve months or greater	984	1,282
Gross unrealized losses, twelve months or greater	(144)	(214)
Fair value, total	8,543	1,282
Gross unrealized losses, total	(222)	(214)
State and political securities
Investment securities
Fair value, less than twelve months	6,051	95,444
Gross unrealized losses, less than twelve months	(128)	(4,797)
Fair value, twelve months or greater	99,405	36,283
Gross unrealized losses, twelve months or greater	(5,159)	(3,977)
Fair value, total	105,456	131,727
Gross unrealized losses, total	(5,287)	(8,774)
Other debt securities
Investment securities
Fair value, less than twelve months	12,976	16,896
Gross unrealized losses, less than twelve months	(218)	(664)
Fair value, twelve months or greater	35,449	25,144
Gross unrealized losses, twelve months or greater	(2,691)	(2,886)
Fair value, total	48,425	42,040
Gross unrealized losses, total	(2,909)	(3,550)
Total debt securities
Investment securities
Fair value, less than twelve months	26,586	115,236
Gross unrealized losses, less than twelve months	(424)	(5,567)
Fair value, twelve months or greater	138,778	62,709
Gross unrealized losses, twelve months or greater	(8,054)	(7,077)
Fair value, total	165,364	177,945
Gross unrealized losses, total	$ (8,478)	$ (12,644)