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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Parenthetical) (Detail) - Non-recurring Basis - USD ($) | Jun. 30, 2020 | Dec. 31, 2019
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Real estate loans |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans receivable | $ 42,600,000 | $ 27,200,000
Secured real estate loans |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans receivable | 43,900,000 | 27,200,000
Consumer loans |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans receivable | 1,200,000 |
Commercial and industrial loans |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans receivable | 288,000 | 3,900,000
Secured commercial and industrial loans |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans receivable | $ 247,000 |
Secured personal property |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Impaired loans receivable |  | $ 3,900,000

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