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SECURITIES - Securities Available for Sale (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Amortized cost and estimated fair value of debt securities available-for-sale |  |
Amortized Cost | $ 669,092 | $ 729,198
Gross Unrealized Gains | 81 | 157
Gross Unrealized Losses | 85,180 | 96,766
Allowance for Credit Losses | 0 |
Estimated Fair Value | 583,993 | 632,589
Amortized Cost |  |
Within one year | 5,678 |
After one, but within five years | 101,391 |
After five, but within ten years | 17,526 |
After ten years | 470 |
Total | 669,092 | 729,198
Fair Value |  |
Within one year | 5,594 |
After one, but within five years | 94,363 |
After five, but within ten years | 14,302 |
After ten years | 428 |
Total | 583,993 | 632,589
U.S. treasury notes and bonds |  |
Amortized cost and estimated fair value of debt securities available-for-sale |  |
Amortized Cost | 59,812 | 61,800
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 4,480 | 6,225
Allowance for Credit Losses | 0 |
Estimated Fair Value | 55,332 | 55,574
Amortized Cost |  |
Total | 59,812 | 61,800
Fair Value |  |
Total | 55,332 | 55,574
Mortgage-backed securities, residential |  |
Amortized cost and estimated fair value of debt securities available-for-sale |  |
Amortized Cost | 476,240 | 518,838
Gross Unrealized Gains | 6 | 0
Gross Unrealized Losses | 72,422 | 83,707
Allowance for Credit Losses | 0 |
Estimated Fair Value | 403,824 | 435,131
Amortized Cost |  |
Without single maturity date | 476,240 |
Total | 476,240 | 518,838
Fair Value |  |
Without single maturity date | 403,824 |
Total | 403,824 | 435,131
Collateralized mortgage obligations |  |
Amortized cost and estimated fair value of debt securities available-for-sale |  |
Amortized Cost | 0 | 0
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 0 | 0
Allowance for Credit Losses | 0 |
Estimated Fair Value | 0 | 0
Amortized Cost |  |
Total | 0 | 0
Fair Value |  |
Total | 0 | 0
Obligations of states and political subdivisions |  |
Amortized cost and estimated fair value of debt securities available-for-sale |  |
Amortized Cost | 39,503 | 39,828
Gross Unrealized Gains | 0 | 2
Gross Unrealized Losses | 817 | 938
Allowance for Credit Losses | 0 |
Estimated Fair Value | 38,686 | 38,892
Amortized Cost |  |
Total | 39,503 | 39,828
Fair Value |  |
Total | 38,686 | 38,892
Corporate bonds and notes |  |
Amortized cost and estimated fair value of debt securities available-for-sale |  |
Amortized Cost | 25,750 | 25,750
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | 5,081 | 3,780
Allowance for Credit Losses | 0 |
Estimated Fair Value | 20,669 | 21,970
Amortized Cost |  |
Total | 25,750 | 25,750
Fair Value |  |
Total | 20,669 | 21,970
SBA loan pools |  |
Amortized cost and estimated fair value of debt securities available-for-sale |  |
Amortized Cost | 67,787 | 82,982
Gross Unrealized Gains | 75 | 155
Gross Unrealized Losses | 2,380 | 2,116
Allowance for Credit Losses | 0 |
Estimated Fair Value | 65,482 | 81,022
Amortized Cost |  |
Without single maturity date | 67,787 |
Total | 67,787 | 82,982
Fair Value |  |
Without single maturity date | 65,482 |
Total | $ 65,482 | $ 81,022

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