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Investments (Unrealized Gross Losses and Estimated Fair values of Investment Securities by Length of Time that Individual Securities in Each Category in Continuous Loss Position) (Details) $ in Thousands | Dec. 31, 2024 USD ($) security | Dec. 31, 2023 USD ($) security
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Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security | 204 | 205
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 74,749 | $ 35,439
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 500 | 74
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 427,491 | 488,825
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 79,609 | 78,848
Debt Securities, Available-for-sale, Unrealized Loss Position | 502,240 | 524,264
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 80,109 | $ 78,922
Obligations of states and political subdivisions |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security | 11 | 6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 1,377 | $ 2,345
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 7 | 6
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 3,597 | 1,437
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 127 | 38
Debt Securities, Available-for-sale, Unrealized Loss Position | 4,974 | 3,782
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 134 | $ 44
MBS issued or guaranteed by U.S. government-sponsored enterprises |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security | 136 | 145
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 36,732 | $ 13,474
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 260 | 23
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 352,823 | 407,200
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 68,903 | 65,955
Debt Securities, Available-for-sale, Unrealized Loss Position | 389,555 | 420,674
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 69,163 | $ 65,978
CMO issued or guaranteed by U.S. government-sponsored enterprises |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security | 47 | 43
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 36,146 | $ 19,620
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 227 | 45
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 55,540 | 62,869
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 8,927 | 9,492
Debt Securities, Available-for-sale, Unrealized Loss Position | 91,686 | 82,489
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 9,154 | $ 9,537
Subordinated corporate bonds |  |
Debt Securities, Available-for-sale [Line Items] |  |
Debt Securities, Available-for-sale, Unrealized Loss Position, Number of Positions | security | 10 | 11
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months | $ 494 | $ 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, Less than 12 Months, Accumulated Loss | 6 | 0
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer | 15,531 | 17,319
Debt Securities, Available-for-sale, Continuous Unrealized Loss Position, 12 Months or Longer, Accumulated Loss | 1,652 | 3,363
Debt Securities, Available-for-sale, Unrealized Loss Position | 16,025 | 17,319
Debt Securities, Available-for-sale, Unrealized Loss Position, Accumulated Loss | $ 1,658 | $ 3,363

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