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SECURITIES - Amortized cost and Fair values of securities with gross unrealized gains and losses (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Available-for-sale: |  |
Amortized Cost | $ 740,056 | $ 831,624
Gross Unrealized Gains | 54 | 99
Gross Unrealized Losses | (71,090) | (72,262)
Allowance for Credit Losses | 0 | 0
Fair Value | 669,020 | 759,461
Held-to-maturity |  |
Amortized Cost | 517,472 | 521,439
Gross Unrealized Gains | 158 | 394
Gross Unrealized Losses | (58,990) | (55,337)
Fair Value | 458,640 | 466,496
Allowance for Credit Losses | 0 | 0
U.S. Treasury |  |
Available-for-sale: |  |
Amortized Cost | 149,697 | 159,715
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (11,511) | (11,093)
Allowance for Credit Losses | 0 | 0
Fair Value | 138,186 | 148,622
U.S. government agency |  |
Available-for-sale: |  |
Amortized Cost | 53,836 | 55,359
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (3,377) | (3,262)
Allowance for Credit Losses | 0 | 0
Fair Value | 50,459 | 52,097
Held-to-maturity |  |
Amortized Cost | 88,454 | 88,448
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (8,977) | (8,292)
Fair Value | 79,477 | 80,156
Allowance for Credit Losses | 0 | 0
Municipal |  |
Available-for-sale: |  |
Amortized Cost | 156,403 | 229,030
Gross Unrealized Gains | 1 | 26
Gross Unrealized Losses | (21,756) | (23,499)
Allowance for Credit Losses | 0 | 0
Fair Value | 134,648 | 205,557
Held-to-maturity |  |
Amortized Cost | 38,459 | 38,442
Gross Unrealized Gains | 158 | 394
Gross Unrealized Losses | (351) | (163)
Fair Value | 38,266 | 38,673
Allowance for Credit Losses | 0 | 0
Agency residential |  |
Available-for-sale: |  |
Amortized Cost | 183,553 | 188,641
Gross Unrealized Gains | 51 | 61
Gross Unrealized Losses | (15,058) | (14,718)
Allowance for Credit Losses | 0 | 0
Fair Value | 168,546 | 173,984
Held-to-maturity |  |
Amortized Cost | 93,737 | 95,828
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (6,497) | (5,569)
Fair Value | 87,240 | 90,259
Allowance for Credit Losses | 0 | 0
Agency commercial |  |
Available-for-sale: |  |
Amortized Cost | 138,873 | 141,214
Gross Unrealized Gains | 2 | 3
Gross Unrealized Losses | (14,400) | (14,205)
Allowance for Credit Losses | 0 | 0
Fair Value | 124,475 | 127,012
Held-to-maturity |  |
Amortized Cost | 296,822 | 298,721
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (43,165) | (41,313)
Fair Value | 253,657 | 257,408
Allowance for Credit Losses | 0 | 0
Corporate |  |
Available-for-sale: |  |
Amortized Cost | 57,694 | 57,665
Gross Unrealized Gains | 0 | 9
Gross Unrealized Losses | (4,988) | (5,485)
Allowance for Credit Losses | 0 | 0
Fair Value | $ 52,706 | $ 52,189

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