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Derivative Instruments and Hedging Activities (Impact of Derivatives on Balance Sheet) (Details) - USD ($) $ in Thousands | Mar. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Derivatives not designated as hedging instruments |  |
Derivative [Line Items] |  |
Fair value of derivative assets | $ 160,545 | $ 169,704
Fair value of derivative liabilities | 97,494 | 78,207
Derivatives not designated as hedging instruments | Interest rate contracts |  |
Derivative [Line Items] |  |
Notional Amount | 9,420,004 | 9,653,600
Fair value of derivative assets | 156,210 | 167,560
Fair value of derivative liabilities | 95,707 | 74,514
Derivatives not designated as hedging instruments | Mortgage derivatives | Mortgage derivatives - interest rate lock commitments |  |
Derivative [Line Items] |  |
Notional Amount | 131,642 | 99,006
Fair value of derivative assets | 788 | 2,105
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 | 178,000 | 105,500
Fair value of derivative assets | 3,443 | 0
Fair value of derivative liabilities | 0 | 122
Derivatives not designated as hedging instruments | Risk participation agreements |  |
Derivative [Line Items] |  |
Notional Amount | 431,402 | 374,214
Fair value of derivative assets | 0 | 0
Fair value of derivative liabilities | 11 | 36
Derivatives not designated as hedging instruments | Foreign exchange contracts |  |
Derivative [Line Items] |  |
Notional Amount | 43,314 | 22,387
Fair value of derivative assets | 104 | 39
Fair value of derivative liabilities | 0 | 0
Derivatives not designated as hedging instruments | Visa Derivative |  |
Derivative [Line Items] |  |
Notional Amount | 0 | 0
Fair value of derivative assets | 0 | 0
Fair value of derivative liabilities | 1,776 | 3,535
Cash flow hedges |  |
Derivative [Line Items] |  |
Fair value of derivative assets | 0 | 22,004
Fair value of derivative liabilities | 134,369 | 20,395
Cash flow hedges | Interest rate contracts |  |
Derivative [Line Items] |  |
Notional Amount | 5,000,000 | 3,600,000
Fair value of derivative assets | 0 | 22,004
Fair value of derivative liabilities | $ 134,369 | $ 20,395

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