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Fair Value Measurements (Assets for which Nonrecurring Changes in Fair Value have been Recorded) (Details) - USD ($) $ in Thousands | Jun. 30, 2025 | Dec. 31, 2024
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Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure | $ 9,493,179 | $ 9,215,376
Fair Value, Inputs, Level 3 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure | 160,186 | 168,528
Impaired Loans [Member] | Fair Value, Inputs, Level 3 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure | 159,773 | 165,951
OREO and Repossessed Assets [Member] | Fair Value, Inputs, Level 3 |  |
Fair Value Assets And Liabilities Measured On Recurring And Nonrecurring Basis [Line Items] |  |
Assets, Fair Value Disclosure | $ 413 | $ 2,577

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