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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 | 12 Months Ended
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Dec. 31, 2021 | Dec. 31, 2020 | Dec. 31, 2019
Derivative Instruments Gain Loss [Line Items] |  |  |
Net gains (losses) recognized in the statements of income | $ 18,392 | $ 35,482 | $ 19,455
Interest Rate Lock Commitments | Mortgage Banking Income |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |
Net gains (losses) recognized in the statements of income | 8,771 | 22,348 | 12,185
Forward Commitments | Mortgage Banking Income |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |
Net gains (losses) recognized in the statements of income | 1,580 | (4,274) | (2,340)
Interest Rate Swap Agreements | Other Noninterest Income |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |
Net gains (losses) recognized in the statements of income | 6,579 | 15,468 | 7,172
Foreign Exchange Contracts | Other Noninterest Income |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |
Net gains (losses) recognized in the statements of income | $ 1,462 | $ 1,940 | 2,891
Conversion Rate Swap Agreement | Investment Securities Gains (Losses), Net |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |
Net gains (losses) recognized in the statements of income |  |  | $ (453)

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 815 -SubTopic 10 -Section 50 -Paragraph 4A -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=125515794&loc=SL5618551-113959 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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