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Derivatives (Effects of Derivative Instruments on the Statements of Income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
--- | --- | ---
Sep. 30, 2025 | Sep. 30, 2024 | Sep. 30, 2025 | Sep. 30, 2024
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivative income reflected in income statement | $ (2,751) | $ (8,881) | $ (8,788) | $ (31,440)
Fair Value Hedging [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivative income reflected in income statement |  |  | 203,500 |
Derivatives Designated as Hedging Instruments [Member] | Cash Flow Hedge [Member] | Interest Rate Swaps - Variable Rate Loans [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivative income reflected in income statement | $ (8,979) | $ (12,649) | $ (26,174) | $ (38,120)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Interest and Fee Income, Loan and Lease, Held-in-Portfolio | Interest and Fee Income, Loan and Lease, Held-in-Portfolio | Interest and Fee Income, Loan and Lease, Held-in-Portfolio | Interest and Fee Income, Loan and Lease, Held-in-Portfolio
Derivatives Designated as Hedging Instruments [Member] | Fair Value Hedging [Member] | Interest Rate Swaps - Securities [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivative income reflected in income statement | $ 4,798 | $ 3,215 | $ 13,398 | $ 9,437
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Interest Income, Securities, Operating, Taxable | Interest Income, Securities, Operating, Taxable | Interest Income, Securities, Operating, Taxable | Interest Income, Securities, Operating, Taxable
Derivatives Not Designated as Hedging Instruments [Member] |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivative income reflected in income statement | $ 1,932 | $ 923 | $ 3,630 | $ (2,939)
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Noninterest Income, Other | Noninterest Income, Other | Noninterest Income, Other | Noninterest Income, Other
Derivatives Not Designated as Hedging Instruments [Member] | Residential mortgage banking |  |  |  |
Derivative Instruments, Gain (Loss) [Line Items] |  |  |  |
Derivative income reflected in income statement | $ (502) | $ (370) | $ 358 | $ 182
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Noninterest Income | Noninterest Income | Noninterest Income | Noninterest Income

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- Definition Amount of increase (decrease) in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4A -Subparagraph (b)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480434/815-10-50-4A Reference 2: http://www.xbrl.org/2003/role/exampleRef -Name Accounting Standards Codification -Section 55 -Paragraph 10 -SubTopic 10 -Topic 825 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482881/825-10-55-10 + Details
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- Definition Line items represent financial concepts included in a table. 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