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Fair Value Measurements - Quantitative Information about Level 3 Fair Value Comments for Assets Measured at Fair Value on Non-Recurring Basis (Parenthetical) (Detail) | Jun. 30, 2020 SecurityLoan
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Commercial term | Commercial and Industrial | Fair Value, Inputs, Level 3 | Non-recurring Basis |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |
Number of loans receivable | 1

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