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Securities, Securities in Continuous Unrealized Loss Position (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Securities [Abstract] |  |
Percentage of total investment with unrealized losses | 95.50% | 97.30%
Available-for-sale, amortized cost [Abstract] |  |
Less than 12 months | $ 68,231 | $ 35,971
12 months or more | 1,071,609 | 1,234,191
Total | 1,139,840 | 1,270,162
Available-for-sale, gross unrealized losses [Abstract] |  |
Less than 12 months | (1,202) | (1,544)
12 months or more | (129,956) | (136,221)
Total | (131,158) | (137,765)
Available-for-sale, fair value [Abstract] |  |
Less than 12 months | 67,029 | 34,427
12 months or more | 941,653 | 1,097,970
Total | 1,008,682 | 1,132,397
U.S. Treasury and Government Agencies [Member] |  |
Available-for-sale, amortized cost [Abstract] |  |
Less than 12 months | 1,396 | 3,761
12 months or more | 351,315 | 361,038
Total | 352,711 | 364,799
Available-for-sale, gross unrealized losses [Abstract] |  |
Less than 12 months | (2) | (5)
12 months or more | (18,614) | (26,567)
Total | (18,616) | (26,572)
Available-for-sale, fair value [Abstract] |  |
Less than 12 months | 1,394 | 3,756
12 months or more | 332,701 | 334,471
Total | 334,095 | 338,227
State and Political Subdivisions [Member] |  |
Available-for-sale, amortized cost [Abstract] |  |
Less than 12 months | 14,262 | 16,154
12 months or more | 288,445 | 284,397
Total | 302,707 | 300,551
Available-for-sale, gross unrealized losses [Abstract] |  |
Less than 12 months | (192) | (1,250)
12 months or more | (50,851) | (47,040)
Total | (51,043) | (48,290)
Available-for-sale, fair value [Abstract] |  |
Less than 12 months | 14,070 | 14,904
12 months or more | 237,594 | 237,357
Total | 251,664 | 252,261
U.S. Government Sponsored Agency Mortgage-backed Securities [Member] |  |
Available-for-sale, amortized cost [Abstract] |  |
Less than 12 months | 28,028 | 16,056
12 months or more | 416,270 | 500,763
Total | 444,298 | 516,819
Available-for-sale, gross unrealized losses [Abstract] |  |
Less than 12 months | (994) | (289)
12 months or more | (60,428) | (61,847)
Total | (61,422) | (62,136)
Available-for-sale, fair value [Abstract] |  |
Less than 12 months | 27,034 | 15,767
12 months or more | 355,842 | 438,916
Total | 382,876 | 454,683
Asset-backed Securities [Member] |  |
Available-for-sale, amortized cost [Abstract] |  |
Less than 12 months | 24,545 | 0
12 months or more | 15,579 | 87,993
Total | 40,124 | 87,993
Available-for-sale, gross unrealized losses [Abstract] |  |
Less than 12 months | (14) | 0
12 months or more | (63) | (767)
Total | (77) | (767)
Available-for-sale, fair value [Abstract] |  |
Less than 12 months | 24,531 | 0
12 months or more | 15,516 | 87,226
Total | $ 40,047 | $ 87,226

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