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Loans and Leases Receivable and Allowance for Credit Losses - Analysis of Loans Modified in Troubled Debt Restructuring by Type of Concession (Detail) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2020 USD ($) Loan | Jun. 30, 2019 USD ($) Loan | Jun. 30, 2020 USD ($) Loan | Jun. 30, 2019 USD ($) Loan
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of loans | Loan | 22 | 2 | 38 | 14
Recorded investment | $ | $ 983 | $ 47 | $ 1,758 | $ 946
Extensions of maturity |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of loans | Loan | 2 | 0 | 6 | 2
Recorded investment | $ | $ 140 | $ 0 | $ 385 | $ 514
Interest-rate reductions |  |  |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |  |  |
Number of loans | Loan | 20 | 2 | 32 | 12
Recorded investment | $ | $ 843 | $ 47 | $ 1,373 | $ 432

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- Definition Number of financing receivables that have been modified by troubled debt restructurings. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
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- Definition Amount, after troubled debt restructuring, of modified financing receivable. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=121611835&loc=SL6953676-111524 + Details
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