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Securities Continuous Unrealized Loss (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
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Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | $ 12,810 | $ 171,001
Available-for-sale Securities Continuous Unrealized Loss Position Less than 12 Months Aggregate Losses | 758 | 12,179
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 359,436 | 230,596
Available-for-sale Securities Continuous Unrealized Loss Position 12 Months or Longer Aggregate Losses | 64,692 | 42,474
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 372,246 | 401,597
Available-for-sale Securities Continuous Unrealized Loss Position Aggregate Losses | 65,450 | 54,653
US Government and Government Agencies and Authorities [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 0 | 55,931
Available-for-sale Securities Continuous Unrealized Loss Position Less than 12 Months Aggregate Losses | 0 | 4,161
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 122,750 | 69,686
Available-for-sale Securities Continuous Unrealized Loss Position 12 Months or Longer Aggregate Losses | 17,152 | 11,665
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 122,750 | 125,617
Available-for-sale Securities Continuous Unrealized Loss Position Aggregate Losses | 17,152 | 15,826
Mortgage-backed Securities, Issued by US Government Sponsored Enterprises [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 84 | 70,293
Available-for-sale Securities Continuous Unrealized Loss Position Less than 12 Months Aggregate Losses | 3 | 5,842
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 192,373 | 147,867
Available-for-sale Securities Continuous Unrealized Loss Position 12 Months or Longer Aggregate Losses | 39,578 | 27,304
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 192,457 | 218,160
Available-for-sale Securities Continuous Unrealized Loss Position Aggregate Losses | 39,581 | 33,146
US States and Political Subdivisions Debt Securities [Member] |  |
Debt Securities, Available-for-Sale, Unrealized Loss Position [Line Items] |  |
Available-for-sale Securities, Continuous Unrealized Loss Position, Less than Twelve Months, Fair Value | 12,726 | 44,777
Available-for-sale Securities Continuous Unrealized Loss Position Less than 12 Months Aggregate Losses | 755 | 2,176
Available-for-sale Securities, Continuous Unrealized Loss Position, Twelve Months or Longer, Fair Value | 44,313 | 13,043
Available-for-sale Securities Continuous Unrealized Loss Position 12 Months or Longer Aggregate Losses | 7,962 | 3,505
Available-for-sale Securities, Continuous Unrealized Loss Position, Fair Value | 57,039 | 57,820
Available-for-sale Securities Continuous Unrealized Loss Position Aggregate Losses | $ 8,717 | $ 5,681

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