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Securities (Schedule of Securities Available-for-Sale) (Details) - USD ($) $ in Thousands | Dec. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | $ 1,871,260 | $ 2,094,826
Gross Unrealized Gains | 1,337 | 695
Gross Unrealized Losses | (275,765) | (333,852)
Fair Value | 1,596,832 | 1,761,669
U.S. Treasury |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 0 | 64,097
Gross Unrealized Gains | 0 | 22
Gross Unrealized Losses | 0 | 0
Fair Value | 0 | 64,119
Obligations of State and Political Subdivisions |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 889,940 | 939,193
Gross Unrealized Gains | 1,309 | 673
Gross Unrealized Losses | (122,374) | (162,014)
Fair Value | 768,875 | 777,852
MBS/CMO |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 761,025 | 846,519
Gross Unrealized Gains | 28 | 0
Gross Unrealized Losses | (116,013) | (131,838)
Fair Value | 645,040 | 714,681
US Gov’t Sponsored Entities & Agencies |  |
Debt Securities, Available-for-sale [Line Items] |  |
Amortized Cost | 220,295 | 245,017
Gross Unrealized Gains | 0 | 0
Gross Unrealized Losses | (37,378) | (40,000)
Fair Value | $ 182,917 | $ 205,017

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