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Securities - Amortized cost and fair value (Details) - USD ($) $ in Thousands | Mar. 31, 2025 | Dec. 31, 2024
--- | --- | ---
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | $ 1,333,778 | $ 1,361,797
Unrealized Gains | 3,282 | 3,127
Unrealized Losses | (154,565) | (168,934)
Fair Value | 1,182,495 | 1,195,990
U.S. Government agencies |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 88,079 | 90,649
Unrealized Gains | 4 | 3
Unrealized Losses | (10,184) | (11,670)
Fair Value | 77,899 | 78,982
Mortgage Backed Securities - residential |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 614,621 | 630,556
Unrealized Gains | 132 | 15
Unrealized Losses | (78,911) | (89,251)
Fair Value | 535,842 | 541,320
Mortgage Backed Securities - commercial |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 14,136 | 14,182
Unrealized Gains | 1 | 2
Unrealized Losses | (415) | (523)
Fair Value | 13,722 | 13,661
Collateralized mortgage obligations |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 184,919 | 190,552
Unrealized Gains | 28 | 29
Unrealized Losses | (25,651) | (27,555)
Fair Value | 159,296 | 163,026
State and municipal obligations |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 390,864 | 394,696
Unrealized Gains | 186 | 171
Unrealized Losses | (34,596) | (34,539)
Fair Value | 356,454 | 360,328
Municipal taxable |  |
Amortized cost and fair value of investments classified as available for sale |  |
Amortized Cost | 41,159 | 41,162
Unrealized Gains | 29 | 11
Unrealized Losses | (4,808) | (5,396)
Fair Value | 36,380 | 35,777
Collateralized debt obligations |  |
Amortized cost and fair value of investments classified as available for sale |  |
Unrealized Gains | 2,902 | 2,896
Fair Value | $ 2,902 | $ 2,896

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