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Derivative Instruments (Schedule Of Notional Amounts Of Derivative Instruments) (Details) - USD ($) $ in Thousands | Sep. 30, 2022 | Dec. 31, 2021
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Derivative [Line Items] |  |
Derivative, Notional Amount | $ 3,179,428 | $ 2,916,181
Interest rate swaps |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | 1,980,368 | 2,229,419
Interest Rate Floor |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | 500,000 | 0
Interest rate caps |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | 152,784 | 152,058
Credit risk participation agreements |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | 536,188 | 485,633
Foreign exchange contracts |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | 7,435 | 5,119
Mortgage loan commitments |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | 984 | 21,787
Mortgage loan forward sale contracts |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | 669 | 1,165
Forward TBA contracts |  |
Derivative [Line Items] |  |
Derivative, Notional Amount | $ 1,000 | $ 21,000

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