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INVESTMENT SECURITIES - Amortized Cost and Fair Values of AFS Securities (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 886,782 | $ 864,920
Gross Unrealized Gains | 4,489 | 1,766
Gross Unrealized Losses | 35,815 | 36,975
Allowance for Credit Losses | 0 | 0
Fair Value | 855,456 | 829,711
U.S. Treasury securities |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 20,040 | 20,043
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 1,623 | 1,980
Allowance for Credit Losses | 0 | 0
Fair Value | 18,417 | 18,063
U.S. Government Agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 2,712 | 2,953
Gross Unrealized Gains | 88 | 100
Gross Unrealized Losses | 0 | 0
Allowance for Credit Losses | 0 | 0
Fair Value | 2,800 | 3,053
States and political subdivisions |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 219,924 | 220,418
Gross Unrealized Gains | 93 | 10
Gross Unrealized Losses | 22,911 | 20,400
Allowance for Credit Losses | 0 | 0
Fair Value | 197,106 | 200,028
GSE residential MBSs |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 160,852 | 155,793
Gross Unrealized Gains | 941 | 52
Gross Unrealized Losses | 2,805 | 4,297
Allowance for Credit Losses | 0 | 0
Fair Value | 158,988 | 151,548
GSE commercial MBSs |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 7,415 | 8,570
Gross Unrealized Gains | 84 | 243
Gross Unrealized Losses | 2 | 21
Allowance for Credit Losses | 0 | 0
Fair Value | 7,497 | 8,792
GSE residential CMOs |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 354,375 | 331,016
Gross Unrealized Gains | 2,634 | 485
Gross Unrealized Losses | 5,602 | 6,809
Allowance for Credit Losses | 0 | 0
Fair Value | 351,407 | 324,692
Non-agency CMOs |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 33,241 | 35,548
Gross Unrealized Gains | 185 | 202
Gross Unrealized Losses | 1,910 | 2,466
Allowance for Credit Losses | 0 | 0
Fair Value | 31,516 | 33,284
Asset-backed |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 86,077 | 88,450
Gross Unrealized Gains | 429 | 655
Gross Unrealized Losses | 962 | 1,002
Allowance for Credit Losses | 0 | 0
Fair Value | 85,544 | 88,103
Corporate debt |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 1,939 | 1,935
Gross Unrealized Gains | 35 | 19
Gross Unrealized Losses | 0 | 0
Allowance for Credit Losses | 0 | 0
Fair Value | 1,974 | 1,954
Other |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 207 | 194
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Allowance for Credit Losses | 0 | 0
Fair Value | $ 207 | $ 194

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