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Derivative Financial Instruments - Effect of Derivative Financial Instruments that are Not Designated as Hedging Instruments on Income Statement (Detail) - Not Designated as Hedging Instrument - USD ($) | 12 Months Ended
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Dec. 31, 2020 | Dec. 31, 2019
Derivative Instruments Gain Loss [Line Items] |  |
Amount of Gain or (Loss) Recognized in Income on Derivative | $ (61,000) | $ 0
Interest Rate Products | Other Income |  |
Derivative Instruments Gain Loss [Line Items] |  |
Amount of Gain or (Loss) Recognized in Income on Derivative | $ (61,000) |

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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=121590274&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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