INVESTMENT SECURITIES - Amortized Cost and Fair Values of AFS Securities (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 552,155	$ 549,089
Gross Unrealized Gains	1,197	1,317
Gross Unrealized Losses	38,443	36,887
Allowance for Credit Losses	0	0
Fair Value	514,909	513,519
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	20,054	20,057
Gross Unrealized Gains	0	0
Gross Unrealized Losses	2,385	2,217
Allowance for Credit Losses	0	0
Fair Value	17,669	17,840
U.S. Government Agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	3,721	3,994
Gross Unrealized Gains	138	157
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0	0
Fair Value	3,859	4,151
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	221,121	221,624
Gross Unrealized Gains	15	28
Gross Unrealized Losses	20,268	18,530
Allowance for Credit Losses	0	0
Fair Value	200,868	203,122
GSE residential MBSs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	61,468	61,669
Gross Unrealized Gains	0	0
Gross Unrealized Losses	3,512	4,037
Allowance for Credit Losses	0	0
Fair Value	57,956	57,632
GSE commercial MBSs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,065	4,387
Gross Unrealized Gains	319	356
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0	0
Fair Value	4,384	4,743
GSE residential CMOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	98,182	79,284
Gross Unrealized Gains	0	18
Gross Unrealized Losses	6,738	6,200
Allowance for Credit Losses	0	0
Fair Value	91,444	73,102
Non-agency CMOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	38,208	48,162
Gross Unrealized Gains	238	316
Gross Unrealized Losses	3,736	3,809
Allowance for Credit Losses	0	0
Fair Value	34,710	44,669
Asset-backed
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	105,216	109,786
Gross Unrealized Gains	487	442
Gross Unrealized Losses	1,804	2,094
Allowance for Credit Losses	0	0
Fair Value	103,899	108,134
Other
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	120	126
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0	0
Fair Value	$ 120	$ 126

Amount, before tax, of unrealized gain in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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Amount, before tax, of unrealized loss in accumulated other comprehensive income (AOCI) on investment in debt security measured at fair value with change in fair value recognized in other comprehensive income (available-for-sale).

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