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SECURITIES - Available-for-sale (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Securities available-for-sale: |  |
Amortized Cost | $ 1,007,670 | $ 1,071,858
Gross Unrealized Gains | 21 | 59
Gross Unrealized Losses | (137,812) | (121,330)
Fair Value | 869,879 | 950,587
Agency notes |  |
Securities available-for-sale: |  |
Amortized Cost | 10,000 |
Gross Unrealized Losses | (857) |
Fair Value | 9,143 |
Treasury securities |  |
Securities available-for-sale: |  |
Amortized Cost | 246,135 | 246,899
Gross Unrealized Losses | (16,262) | (19,643)
Fair Value | 229,873 | 227,256
Corporate securities |  |
Securities available-for-sale: |  |
Amortized Cost | 169,549 | 183,791
Gross Unrealized Gains |  | 57
Gross Unrealized Losses | (28,462) | (17,075)
Fair Value | 141,087 | 166,773
Pass-through MBS issued by GSEs |  |
Securities available-for-sale: |  |
Amortized Cost | 239,509 | 272,774
Gross Unrealized Losses | (33,306) | (31,534)
Fair Value | 206,203 | 241,240
Agency CMOs |  |
Securities available-for-sale: |  |
Amortized Cost | 311,632 | 331,394
Gross Unrealized Gains | 21 | 2
Gross Unrealized Losses | (56,011) | (50,057)
Fair Value | 255,642 | 281,339
State and municipal obligations. |  |
Securities available-for-sale: |  |
Amortized Cost | 30,845 | 37,000
Gross Unrealized Losses | (2,914) | (3,021)
Fair Value | $ 27,931 | $ 33,979

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