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Derivative Financial Instruments - Derivative Financial Instruments and the Amount and Location of the Net Gains or Losses Recognized in 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] |  |  |  |
Net gains (losses) recognized in the statements of income | $ 1,549 | $ 7,291 | $ 4,680 | $ 19,570
Derivatives designated as hedging instruments | Interest Income on Investment Securities Available-for-Sale |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Net gains (losses) recognized in the statements of income | (750) | 22,435 | 6,746 | 2,288
Derivatives designated as hedging instruments | Interest Income on Investment Securities Available-for-Sale | Interest Rate Swap Agreements: |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Net gains (losses) recognized in the statements of income | 726 | (22,380) | (6,764) | (2,405)
Derivatives designated as hedging instruments | Interest Income on Investment Securities Available-for-Sale | Net Cash Settlements |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Net gains (losses) recognized in the statements of income | 226 | 2,615 | 205 | 8,073
Derivatives designated as hedging instruments | Interest and Fees on Loans and Leases |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Net gains (losses) recognized in the statements of income | (238) | 31,781 | 11,551 | 4,721
Derivatives designated as hedging instruments | Interest and Fees on Loans and Leases | Interest Rate Swap Agreements: |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Net gains (losses) recognized in the statements of income | 173 | (31,458) | (11,654) | (4,634)
Derivatives designated as hedging instruments | Interest and Fees on Loans and Leases | Net Cash Settlements |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Net gains (losses) recognized in the statements of income | 2,130 | 3,976 | 5,639 | 10,691
Derivatives not designated as hedging instruments | Interest Rate Lock Commitments |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Net gains (losses) recognized in the statements of income | $ 85 | $ 506 | $ 337 | $ 751
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Mortgage Banking | Mortgage Banking | Mortgage Banking | Mortgage Banking
Derivatives not designated as hedging instruments | Forward Commitments |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Net gains (losses) recognized in the statements of income | $ (4) | $ (137) | $ (8) | $ 79
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Mortgage Banking | Mortgage Banking | Mortgage Banking | Mortgage Banking
Derivatives not designated as hedging instruments | Interest Rate Swap Agreements: |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Net gains (losses) recognized in the statements of income | $ (19) | $ (47) | $ (29) | $ 6
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Other | Other | Other | Other
Derivatives not designated as hedging instruments | Conversion Rate Swap Agreements |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Net gains (losses) recognized in the statements of income | $ (780) | $ 0 | $ (1,343) | $ 0
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Investment Securities Losses, Net | Investment Securities Losses, Net | Investment Securities Losses, Net | Investment Securities Losses, Net

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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 Indicates line item in statement of income or comprehensive income that includes gain (loss) from derivative. + 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 + Details
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- Definition Line items represent financial concepts included in a table. 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