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Securities, Available-for-sale Securities (Details) - USD ($) $ in Thousands | Jun. 30, 2024 | Dec. 31, 2023
--- | --- | ---
Available-for-sale [Abstract] |  |
Amortized cost | $ 1,232,879 | $ 1,301,244
Gross unrealized gains | 461 | 245
Gross unrealized losses | (143,018) | (137,765)
Fair value | 1,090,322 | 1,163,724
U.S. Treasury and Government Agencies [Member] |  |
Available-for-sale [Abstract] |  |
Amortized cost | 364,730 | 381,268
Gross unrealized gains | 115 | 121
Gross unrealized losses | (25,844) | (26,572)
Fair value | 339,001 | 354,817
State and Political Subdivisions [Member] |  |
Available-for-sale [Abstract] |  |
Amortized cost | 310,609 | 313,147
Gross unrealized gains | 15 | 88
Gross unrealized losses | (52,482) | (48,290)
Fair value | 258,142 | 264,945
U.S. Government Sponsored Agency Mortgage-backed Securities [Member] |  |
Available-for-sale [Abstract] |  |
Amortized cost | 488,253 | 518,836
Gross unrealized gains | 323 | 36
Gross unrealized losses | (64,477) | (62,136)
Fair value | 424,099 | 456,736
Asset-backed Securities [Member] |  |
Available-for-sale [Abstract] |  |
Amortized cost | 69,287 | 87,993
Gross unrealized gains | 8 | 0
Gross unrealized losses | (215) | (767)
Fair value | $ 69,080 | $ 87,226

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