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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
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Sep. 30, 2021 | Sep. 30, 2020 | Sep. 30, 2021 | Sep. 30, 2020
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Net gains (losses) recognized in the statements of income | $ 4,578 | $ 7,350 | $ 14,493 | $ 25,348
Interest Rate Lock Commitments | Mortgage Banking Income |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Net gains (losses) recognized in the statements of income | 2,083 | 4,903 | 6,927 | 15,556
Forward Commitments | Mortgage Banking Income |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Net gains (losses) recognized in the statements of income | (53) | (595) | 1,598 | (3,652)
Interest Rate Swap Agreements | Other Noninterest Income |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Net gains (losses) recognized in the statements of income | 2,147 | 2,575 | 4,848 | 12,041
Foreign Exchange Contracts | Other Noninterest Income |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Net gains (losses) recognized in the statements of income | $ 401 | $ 467 | $ 1,120 | $ 1,403

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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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