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Derivative Financial Instruments - Effect of Derivative Instruments on Consolidated Statement of Earnings (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Jun. 30, 2024 | Jun. 30, 2023
Derivatives, Fair Value [Line Items] |  |  |  |
Amount of Gains (Losses) Recognized in Net Interest Income on Derivative Instruments | $ 2,448 | $ 7,846 | $ 15,874 | $ 7,846
Fair Value Hedging [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Amount of Gains (Losses) Recognized in Net Interest Income on Derivative Instruments | 1,888 | 7,846 | 14,758 | 7,846
Cash Flow Hedging [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Amount of Gains (Losses) Recognized in Net Interest Income on Derivative Instruments | 560 | 0 | 1,116 | 0
Derivatives Not Designated as Hedging Instruments [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Amount of Gains (Losses) Recognized in Net Interest Income on Derivative Instruments | 0 | 0 | 0 | 0
Derivatives Not Designated as Hedging Instruments [Member] | Interest Rate Swaps [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Amount of Gains (Losses) Recognized in Net Interest Income on Derivative Instruments | $ 0 | $ 0 | $ 0 | $ 0
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration] | Noninterest Income | Noninterest Income | Noninterest Income | Noninterest Income
Designated as Hedging Instrument [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Amount of Gains (Losses) Recognized in Net Interest Income on Derivative Instruments | $ 5,015 | $ 446 | $ 8,880 | $ 446
Designated as Hedging Instrument [Member] | Fair Value Hedging [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Amount of Gains (Losses) Recognized in Net Interest Income on Derivative Instruments | $ 4,097 | $ 446 | $ 7,784 | $ 446
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration] | Interest and Dividend Income, Operating | Interest and Dividend Income, Operating | Interest and Dividend Income, Operating | Interest and Dividend Income, Operating
Designated as Hedging Instrument [Member] | Cash Flow Hedging [Member] |  |  |  |
Derivatives, Fair Value [Line Items] |  |  |  |
Amount of Gains (Losses) Recognized in Net Interest Income on Derivative Instruments | $ 918 | $ 0 | $ 1,096 | $ 0
Derivative, Gain, Statement of Income or Comprehensive Income [Extensible Enumeration] | Interest Expense, Operating and Nonoperating | Interest Expense, Operating and Nonoperating | Interest Expense, Operating and Nonoperating | Interest Expense, Operating and Nonoperating

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- Definition Amount of increase in the fair value of derivatives recognized in the income statement. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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 Indicates line item in statement of income or comprehensive income that includes gain from derivative. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -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. 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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