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Derivative Instruments and Hedging Activities (Schedule of Impact of Derivatives on Balance Sheet) (Details) - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Designated as hedging instruments |  |
Derivative [Line Items] |  |
Estimated fair value of derivative assets | $ 6,114 | $ 0
Estimated fair value of derivative liabilities | 12,252 | 16,379
Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Estimated fair value of derivative assets | 155,049 | 89,815
Estimated fair value of derivative liabilities | 376,509 | 326,301
Derivatives not designated as hedging instruments | Interest rate contracts |  |
Derivative [Line Items] |  |
Notional Amount | 11,343,848 | 10,276,754
Estimated fair value of derivative assets | 153,052 | 89,310
Estimated fair value of derivative liabilities | 374,865 | 322,329
Derivatives not designated as hedging instruments | Mortgage derivatives | Mortgage derivatives - interest rate lock commitments |  |
Derivative [Line Items] |  |
Notional Amount | 57,643 | 50,218
Estimated fair value of derivative assets | 632 | 350
Estimated fair value of derivative liabilities | 0 | 0
Derivatives not designated as hedging instruments | Mortgage derivatives | Mortgage derivatives - forward commitments to sell fixed-rate mortgage loans |  |
Derivative [Line Items] |  |
Notional Amount | 86,234 | 76,500
Estimated fair value of derivative assets | 728 | 155
Estimated fair value of derivative liabilities | 0 | 0
Derivatives not designated as hedging instruments | Risk participation agreements |  |
Derivative [Line Items] |  |
Notional Amount | 708,259 | 635,891
Estimated fair value of derivative assets | 0 | 0
Estimated fair value of derivative liabilities | 1 | 3
Derivatives not designated as hedging instruments | Foreign exchange contracts |  |
Derivative [Line Items] |  |
Notional Amount | 41,420 | 20,439
Estimated fair value of derivative assets | 637 | 0
Estimated fair value of derivative liabilities | 0 | 516
Derivatives not designated as hedging instruments | Visa derivative |  |
Derivative [Line Items] |  |
Notional Amount | 0 | 0
Estimated fair value of derivative assets | 0 | 0
Estimated fair value of derivative liabilities | 1,643 | 3,453
Cash flow hedges |  |
Derivative [Line Items] |  |
Estimated fair value of derivative assets | 6,114 | 0
Estimated fair value of derivative liabilities | 0 | 8,286
Cash flow hedges | Interest rate contracts |  |
Derivative [Line Items] |  |
Notional Amount | 5,750,000 | 5,250,000
Estimated fair value of derivative assets | 6,114 | 0
Estimated fair value of derivative liabilities | 0 | 8,286
Fair value hedges |  |
Derivative [Line Items] |  |
Estimated fair value of derivative assets | 0 | 0
Estimated fair value of derivative liabilities | 12,252 | 8,093
Fair value hedges | Interest rate contracts |  |
Derivative [Line Items] |  |
Notional Amount | 2,773,504 | 2,230,232
Estimated fair value of derivative assets | 0 | 0
Estimated fair value of derivative liabilities | $ 12,252 | $ 8,093

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