INVESTMENT SECURITIES - Amortized Cost and Fair Values of AFS Securities (Details) - USD ($) $ in Thousands	Jun. 30, 2023	Dec. 31, 2022
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 552,224	$ 563,278
Gross Unrealized Gains	1,142	490
Gross Unrealized Losses	44,754	50,040
Allowance for Credit Losses	0
Fair Value	508,612	513,728
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	20,064	20,070
Gross Unrealized Gains	0	0
Gross Unrealized Losses	2,691	2,779
Allowance for Credit Losses	0
Fair Value	17,373	17,291
U.S. Government Agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	4,395	4,907
Gross Unrealized Gains	192	228
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0
Fair Value	4,587	5,135
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	224,777	225,825
Gross Unrealized Gains	14	19
Gross Unrealized Losses	23,210	28,430
Allowance for Credit Losses	0
Fair Value	201,581	197,414
GSE residential MBSs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	62,703	63,778
Gross Unrealized Gains	0	0
Gross Unrealized Losses	4,371	4,376
Allowance for Credit Losses	0
Fair Value	58,332	59,402
GSE commercial MBSs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	5,201
Gross Unrealized Gains	438
Gross Unrealized Losses	0
Allowance for Credit Losses	0
Fair Value	5,639
GSE residential CMOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	72,363	75,446
Gross Unrealized Gains	0	0
Gross Unrealized Losses	7,028	7,068
Allowance for Credit Losses	0
Fair Value	65,335	68,378
Non-agency CMOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	44,537	42,298
Gross Unrealized Gains	269	243
Gross Unrealized Losses	4,453	2,783
Allowance for Credit Losses	0
Fair Value	40,353	39,758
Asset-backed
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	118,066	130,577
Gross Unrealized Gains	229	0
Gross Unrealized Losses	3,001	4,604
Allowance for Credit Losses	0
Fair Value	115,294	125,973
Other
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	118	377
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0
Fair Value	$ 118	$ 377

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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