INVESTMENT SECURITIES - Amortized Cost and Fair Values of AFS Securities (Details) - USD ($) $ in Thousands	Sep. 30, 2025	Dec. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	$ 912,760	$ 864,920
Gross Unrealized Gains	7,767	1,766
Gross Unrealized Losses	30,170	36,975
Allowance for Credit Losses	0	0
Fair Value	890,357	829,711
U.S. Treasury securities
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	20,033	20,043
Gross Unrealized Gains	0	0
Gross Unrealized Losses	1,230	1,980
Allowance for Credit Losses	0	0
Fair Value	18,803	18,063
U.S. Government Agencies
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,966	2,953
Gross Unrealized Gains	55	100
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0	0
Fair Value	2,021	3,053
States and political subdivisions
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	219,331	220,418
Gross Unrealized Gains	243	10
Gross Unrealized Losses	19,461	20,400
Allowance for Credit Losses	0	0
Fair Value	200,113	200,028
GSE residential MBSs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	174,647	155,793
Gross Unrealized Gains	2,697	52
Gross Unrealized Losses	2,216	4,297
Allowance for Credit Losses	0	0
Fair Value	175,128	151,548
GSE commercial MBSs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	6,514	8,570
Gross Unrealized Gains	102	243
Gross Unrealized Losses	17	21
Allowance for Credit Losses	0	0
Fair Value	6,599	8,792
GSE residential CMOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	359,294	331,016
Gross Unrealized Gains	4,045	485
Gross Unrealized Losses	5,153	6,809
Allowance for Credit Losses	0	0
Fair Value	358,186	324,692
Non-agency CMOs
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	48,105	35,548
Gross Unrealized Gains	156	202
Gross Unrealized Losses	1,136	2,466
Allowance for Credit Losses	0	0
Fair Value	47,125	33,284
Asset-backed
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	80,705	88,450
Gross Unrealized Gains	419	655
Gross Unrealized Losses	957	1,002
Allowance for Credit Losses	0	0
Fair Value	80,167	88,103
Corporate debt
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	1,944	1,935
Gross Unrealized Gains	50	19
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0	0
Fair Value	1,994	1,954
Other
Debt Securities, Available-for-sale [Line Items]
Amortized Cost	221	194
Gross Unrealized Gains	0	0
Gross Unrealized Losses	0	0
Allowance for Credit Losses	0	0
Fair Value	$ 221	$ 194