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INVESTMENT SECURITIES - Available for sale securities (Details) - USD ($) $ in Thousands | 9 Months Ended | 12 Months Ended
--- | --- | ---
Sep. 30, 2024 | Dec. 31, 2023
AVAILABLE-FOR-SALE SECURITIES: |  |
Amortized Cost | $ 603,877 | $ 531,892
Gross Unrealized Gains | 3,937 | 534
Gross Unrealized Losses | 42,589 | 54,219
Fair Value | 565,225 | 478,207
Agency mortgage-backed securities |  |
AVAILABLE-FOR-SALE SECURITIES: |  |
Amortized Cost | 352,265 | 316,114
Gross Unrealized Gains | 1,900 | 7
Gross Unrealized Losses | 28,060 | 35,890
Fair Value | 326,105 | 280,231
Agency collateralized mortgage obligations |  |
AVAILABLE-FOR-SALE SECURITIES: |  |
Amortized Cost | 125,421 | 85,989
Gross Unrealized Gains | 1,626 |
Gross Unrealized Losses | 7,385 | 10,043
Fair Value | 119,662 | 75,946
States and political subdivisions securities |  |
AVAILABLE-FOR-SALE SECURITIES: |  |
Amortized Cost | 58,742 | 59,141
Gross Unrealized Gains | 324 | 527
Gross Unrealized Losses | 1,475 | 1,531
Fair Value | 57,591 | 58,137
Small Business Administration securities |  |
AVAILABLE-FOR-SALE SECURITIES: |  |
Amortized Cost | 67,449 | 70,648
Gross Unrealized Gains | 87 |
Gross Unrealized Losses | 5,669 | 6,755
Fair Value | $ 61,867 | $ 63,893

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