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SECURITIES - Available-for-sale (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Securities available-for-sale: |  |
Amortized Cost | $ 965,341 | $ 995,709
Gross Unrealized Gains | 291 | 56
Gross Unrealized Losses | (106,416) | (109,525)
Fair Value | 859,216 | 886,240
Agency notes |  |
Securities available-for-sale: |  |
Amortized Cost | 10,000 | 10,000
Gross Unrealized Losses | (591) | (629)
Fair Value | 9,409 | 9,371
Treasury securities |  |
Securities available-for-sale: |  |
Amortized Cost | 238,622 | 245,877
Gross Unrealized Losses | (10,451) | (11,687)
Fair Value | 228,171 | 234,190
Corporate securities |  |
Securities available-for-sale: |  |
Amortized Cost | 169,954 | 174,978
Gross Unrealized Gains | 255 |
Gross Unrealized Losses | (19,964) | (23,808)
Fair Value | 150,245 | 151,170
Pass-through MBS issued by GSEs |  |
Securities available-for-sale: |  |
Amortized Cost | 221,666 | 230,253
Gross Unrealized Gains | 16 | 10
Gross Unrealized Losses | (25,806) | (24,978)
Fair Value | 195,876 | 205,285
Agency CMOs |  |
Securities available-for-sale: |  |
Amortized Cost | 297,445 | 305,860
Gross Unrealized Gains | 20 | 46
Gross Unrealized Losses | (47,625) | (46,491)
Fair Value | 249,840 | 259,415
State and municipal obligations |  |
Securities available-for-sale: |  |
Amortized Cost | 27,654 | 28,741
Gross Unrealized Losses | (1,979) | (1,932)
Fair Value | $ 25,675 | $ 26,809

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