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SECURITIES - Available-for-sale (Details) - USD ($) $ in Thousands | Sep. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Securities available-for-sale: |  |
Amortized Cost | $ 851,823 | $ 995,709
Gross Unrealized Gains | 695 | 56
Gross Unrealized Losses | (77,910) | (109,525)
Fair Value | 774,608 | 886,240
Agency notes |  |
Securities available-for-sale: |  |
Amortized Cost | 10,000 | 10,000
Gross Unrealized Losses | (311) | (629)
Fair Value | 9,689 | 9,371
Treasury securities |  |
Securities available-for-sale: |  |
Amortized Cost | 166,278 | 245,877
Gross Unrealized Losses | (4,907) | (11,687)
Fair Value | 161,371 | 234,190
Corporate securities |  |
Securities available-for-sale: |  |
Amortized Cost | 173,909 | 174,978
Gross Unrealized Gains | 607 |
Gross Unrealized Losses | (13,887) | (23,808)
Fair Value | 160,629 | 151,170
Pass-through MBS issued by GSEs |  |
Securities available-for-sale: |  |
Amortized Cost | 197,805 | 230,253
Gross Unrealized Gains | 26 | 10
Gross Unrealized Losses | (18,495) | (24,978)
Fair Value | 179,336 | 205,285
Agency CMOs |  |
Securities available-for-sale: |  |
Amortized Cost | 276,677 | 305,860
Gross Unrealized Gains | 61 | 46
Gross Unrealized Losses | (38,965) | (46,491)
Fair Value | 237,773 | 259,415
Debt Security, Corporate, US [Member] |  |
Securities available-for-sale: |  |
Amortized Cost | 27,154 | 28,741
Gross Unrealized Gains | 1 |
Gross Unrealized Losses | (1,345) | (1,932)
Fair Value | $ 25,810 | $ 26,809

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