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Derivatives and Hedging Activities - Effect of Derivative Financial Instruments that are Not Designated as Hedging Instruments on Income Statement (Detail) - Not Designated as Hedging Instrument - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022 | Sep. 30, 2023 | Sep. 30, 2022
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Amount of Gain or (Loss) Recognized in Income on Derivative | $ 62 | $ 35 | $ (23) | $ 148
Derivative, Gain (Loss), Statement of Income or Comprehensive Income [Extensible Enumeration] | Noninterest Income, Other Operating Income | Noninterest Income, Other Operating Income | Noninterest Income, Other Operating Income | Noninterest Income, Other Operating Income
Interest Rate Products |  |  |  |
Derivative Instruments Gain Loss [Line Items] |  |  |  |
Amount of Gain or (Loss) Recognized in Income on Derivative | $ 62 | $ 35 | $ (23) | $ 148

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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 + 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. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 815 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 4E -Publisher FASB -URI https://asc.fasb.org//1943274/2147480434/815-10-50-4E + Details
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