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Securities - Amortized Cost and Fair Value of Securities (Details) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | --- | ---
Securities held-to-maturity, amortized cost | $ 74,811 |  |
Securities held-to-maturity, amortized cost | 73,711 | $ 57,868 |
Securities held-to-maturity, fair value | 62,550 | 62,029 |
Securities held-to-maturity, gross Unrecognized gains |  | 3,299 |
Securities held-to-maturity, gross Unrecognized losses | 12,261 |  |
Securities held-to-maturity, allowance for credit losses | (1,100) | (862) | $ (907)
Securities available for sale, amortized cost, total other securities | 826,881 | 786,425 |
Securities available for sale, fair value | 735,357 | 777,236 |
Securities available for sale, gross unrealized gains | 5 | 3,031 |
Securities available for sale, gross unrealized losses | 91,529 | 12,220 |
Other Securities [Member] |  |  |
Securities available for sale, amortized cost, total other securities | 1,516 | 1,695 |
Securities available for sale, fair value | 1,516 | 1,695 |
Securities available for sale, gross unrealized gains | 0 | 0 |
Securities available for sale, gross unrealized losses | 0 | 0 |
US Government Agencies Debt Securities [Member] |  |  |
Securities available for sale, amortized cost, total other securities | 83,720 | 5,599 |
Securities available for sale, fair value | 81,103 | 5,590 |
Securities available for sale, gross unrealized gains | 2 | 0 |
Securities available for sale, gross unrealized losses | 2,619 | 9 |
Corporate Debt Securities [Member] |  |  |
Securities available for sale, amortized cost, total other securities | 146,430 | 107,423 |
Securities available for sale, fair value | 131,766 | 104,370 |
Securities available for sale, gross unrealized gains | 0 | 136 |
Securities available for sale, gross unrealized losses | 14,664 | 3,189 |
US States and Political Subdivisions Debt Securities [Member] |  |  |
Securities held-to-maturity, amortized cost | 66,936 | 50,836 |
Securities held-to-maturity, fair value | 55,561 | 53,362 |
Securities held-to-maturity, gross Unrecognized gains |  | 2,526 |
Securities held-to-maturity, gross Unrecognized losses | 11,375 |  |
Mutual Fund Debt Securities [Member] |  |  |
Securities available for sale, amortized cost, total other securities | 11,211 | 12,485 |
Securities available for sale, fair value | 11,211 | 12,485 |
Securities available for sale, gross unrealized gains | 0 | 0 |
Securities available for sale, gross unrealized losses | 0 | 0 |
Collateralized Debt Obligations [Member] |  |  |
Securities available for sale, amortized cost, total other securities | 129,684 | 81,166 |
Securities available for sale, fair value | 125,478 | 80,912 |
Securities available for sale, gross unrealized gains | 0 | 1 |
Securities available for sale, gross unrealized losses | 4,206 | 255 |
Other Debt Obligations |  |  |
Securities held-to-maturity, amortized cost | 66,936 | 50,836 |
Securities held-to-maturity, amortized cost | 65,836 | 49,974 |
Securities held-to-maturity, fair value | 55,561 | 53,362 |
Securities held-to-maturity, gross Unrecognized gains |  | 2,526 |
Securities held-to-maturity, gross Unrecognized losses | 11,375 |  |
Securities held-to-maturity, allowance for credit losses | (1,100) | (862) |
Securities available for sale, fair value | 351,074 | 205,052 |
Collateralized Mortgage Backed Securities |  |  |
Securities held-to-maturity, amortized cost | 7,875 | 7,894 |
Securities held-to-maturity, amortized cost | 7,875 | 7,894 |
Securities held-to-maturity, fair value | 6,989 | 8,667 |
Securities held-to-maturity, gross Unrecognized gains |  | 773 |
Securities held-to-maturity, gross Unrecognized losses | 886 |  |
Securities available for sale, amortized cost, total other securities | 454,320 | 578,057 |
Securities available for sale, fair value | 384,283 | 572,184 |
Securities available for sale, gross unrealized gains | 3 | 2,894 |
Securities available for sale, gross unrealized losses | 70,040 | 8,767 |
REMIC and CMO [Member] |  |  |
Securities available for sale, amortized cost, total other securities | 175,712 | 210,948 |
Securities available for sale, fair value | 148,414 | 208,509 |
Securities available for sale, gross unrealized gains | 0 | 1,217 |
Securities available for sale, gross unrealized losses | 27,298 | 3,656 |
GNMA [Member] |  |  |
Securities available for sale, amortized cost, total other securities | 9,193 | 10,572 |
Securities available for sale, fair value | 7,317 | 10,286 |
Securities available for sale, gross unrealized gains | 3 | 30 |
Securities available for sale, gross unrealized losses | 1,879 | 316 |
FNMA [Member] |  |  |
Securities held-to-maturity, amortized cost | 7,875 | 7,894 |
Securities held-to-maturity, fair value | 6,989 | 8,667 |
Securities held-to-maturity, gross Unrecognized gains |  | 773 |
Securities held-to-maturity, gross Unrecognized losses | 886 |  |
Securities available for sale, amortized cost, total other securities | 172,690 | 203,777 |
Securities available for sale, fair value | 148,265 | 202,938 |
Securities available for sale, gross unrealized gains | 0 | 1,321 |
Securities available for sale, gross unrealized losses | 24,425 | 2,160 |
FHLMC [Member] |  |  |
Securities available for sale, amortized cost, total other securities | 96,725 | 152,760 |
Securities available for sale, fair value | 80,287 | 150,451 |
Securities available for sale, gross unrealized gains | 0 | 326 |
Securities available for sale, gross unrealized losses | 16,438 | 2,635 |
Available for Sale Securities Excluding Mortgage Backed Securities [Member] |  |  |
Securities available for sale, amortized cost, total other securities | 372,561 | 208,368 |
Securities available for sale, fair value | 351,074 | 205,052 |
Securities available for sale, gross unrealized gains | 2 | 137 |
Securities available for sale, gross unrealized losses | $ 21,489 | $ 3,453 |

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