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INVESTMENT SECURITIES - Amortized Cost and Fair Values of AFS Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 916,830 | $ 864,920
Gross Unrealized Gains | 5,767 | 1,766
Gross Unrealized Losses | 37,224 | 36,975
Allowance for Credit Losses | 0 | 0
Fair Value | 885,373 | 829,711
U.S. Treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 20,036 | 20,043
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 1,395 | 1,980
Allowance for Credit Losses | 0 | 0
Fair Value | 18,641 | 18,063
U.S. Government Agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 2,375 | 2,953
Gross Unrealized Gains | 76 | 100
Gross Unrealized Losses | 0 | 0
Allowance for Credit Losses | 0 | 0
Fair Value | 2,451 | 3,053
States and political subdivisions |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 220,481 | 220,418
Gross Unrealized Gains | 125 | 10
Gross Unrealized Losses | 24,655 | 20,400
Allowance for Credit Losses | 0 | 0
Fair Value | 195,951 | 200,028
GSE residential MBSs |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 195,595 | 155,793
Gross Unrealized Gains | 1,559 | 52
Gross Unrealized Losses | 2,546 | 4,297
Allowance for Credit Losses | 0 | 0
Fair Value | 194,608 | 151,548
GSE commercial MBSs |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 7,386 | 8,570
Gross Unrealized Gains | 119 | 243
Gross Unrealized Losses | 16 | 21
Allowance for Credit Losses | 0 | 0
Fair Value | 7,489 | 8,792
GSE residential CMOs |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 342,909 | 331,016
Gross Unrealized Gains | 3,401 | 485
Gross Unrealized Losses | 5,561 | 6,809
Allowance for Credit Losses | 0 | 0
Fair Value | 340,749 | 324,692
Non-agency CMOs |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 42,775 | 35,548
Gross Unrealized Gains | 182 | 202
Gross Unrealized Losses | 1,661 | 2,466
Allowance for Credit Losses | 0 | 0
Fair Value | 41,296 | 33,284
Asset-backed |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 83,117 | 88,450
Gross Unrealized Gains | 269 | 655
Gross Unrealized Losses | 1,390 | 1,002
Allowance for Credit Losses | 0 | 0
Fair Value | 81,996 | 88,103
Corporate debt |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 1,941 | 1,935
Gross Unrealized Gains | 36 | 19
Gross Unrealized Losses | 0 | 0
Allowance for Credit Losses | 0 | 0
Fair Value | 1,977 | 1,954
Other |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 215 | 194
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Allowance for Credit Losses | 0 | 0
Fair Value | $ 215 | $ 194

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