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Securities - Unrealized Loss on Securities (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
AVAILABLE FOR SALE |  |
Less than 12 Months, fair value | $ 287,599 | $ 1,174,855
Less than 12 Months, unrealized loss | 9,869 | 82,638
More than 12 Months, fair value | 791,623 | 29,165
More than 12 Months, unrealized Loss | 127,464 | 7,504
Total fair value | 1,079,222 | 1,204,020
Total unrealized loss | 137,333 | 90,142
HELD TO MATURITY |  |
Less than 12 months, fair value | 200,330 | 672,739
Less than 12 months, unrealized loss | 14,978 | 83,876
More than 12 months, fair value | 845,470 | 340,055
More than 12 months, unrealized loss | 240,792 | 98,262
Total fair value | 1,045,800 | 1,012,794
Total unrealized loss | 255,770 | 182,138
State and political subdivisions |  |
AVAILABLE FOR SALE |  |
Less than 12 Months, fair value | 115,067 | 859,270
Less than 12 Months, unrealized loss | 6,434 | 68,683
More than 12 Months, fair value | 591,566 | 26,620
More than 12 Months, unrealized Loss | 107,790 | 6,874
Total fair value | 706,633 | 885,890
Total unrealized loss | 114,224 | 75,557
HELD TO MATURITY |  |
Less than 12 months, fair value | 186,212 | 426,382
Less than 12 months, unrealized loss | 13,551 | 66,898
More than 12 months, fair value | 626,801 | 323,385
More than 12 months, unrealized loss | 212,370 | 96,385
Total fair value | 813,013 | 749,767
Total unrealized loss | 225,921 | 163,283
Corporate bonds and other |  |
AVAILABLE FOR SALE |  |
Less than 12 Months, fair value | 12,500 | 3,678
Less than 12 Months, unrealized loss | 1,166 | 14
More than 12 Months, fair value | 689 | 0
More than 12 Months, unrealized Loss | 7 | 0
Total fair value | 13,189 | 3,678
Total unrealized loss | 1,173 | 14
HELD TO MATURITY |  |
Less than 12 months, fair value | 13,595 | 125,250
Less than 12 months, unrealized loss | 1,425 | 6,660
More than 12 months, fair value | 111,451 | 12,738
More than 12 months, unrealized loss | 13,855 | 1,333
Total fair value | 125,046 | 137,988
Total unrealized loss | 15,280 | 7,993
Residential |  |
AVAILABLE FOR SALE |  |
Less than 12 Months, fair value | 157,854 | 306,294
Less than 12 Months, unrealized loss | 2,226 | 13,623
More than 12 Months, fair value | 191,521 | 0
More than 12 Months, unrealized Loss | 18,635 | 0
Total fair value | 349,375 | 306,294
Total unrealized loss | 20,861 | 13,623
HELD TO MATURITY |  |
Less than 12 months, fair value | 523 | 80,801
Less than 12 months, unrealized loss | 2 | 7,799
More than 12 months, fair value | 80,024 | 3,932
More than 12 months, unrealized loss | 11,303 | 544
Total fair value | 80,547 | 84,733
Total unrealized loss | 11,305 | 8,343
Commercial |  |
AVAILABLE FOR SALE |  |
Less than 12 Months, fair value | 2,178 | 5,613
Less than 12 Months, unrealized loss | 43 | 318
More than 12 Months, fair value | 7,847 | 2,545
More than 12 Months, unrealized Loss | 1,032 | 630
Total fair value | 10,025 | 8,158
Total unrealized loss | 1,075 | 948
HELD TO MATURITY |  |
Less than 12 months, fair value | 0 | 40,306
Less than 12 months, unrealized loss | 0 | 2,519
More than 12 months, fair value | 27,194 | 0
More than 12 months, unrealized loss | 3,264 | 0
Total fair value | 27,194 | 40,306
Total unrealized loss | $ 3,264 | $ 2,519

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