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Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail) - Non-recurring Basis - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral dependent loans | $ 12,325 | $ 63,114
Other real estate owned | 675 | 2,360
Repossessed personal property | 180 | 857
Quoted Prices in Active Markets for Identical Assets |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral dependent loans | 0 | 0
Other real estate owned | 0 | 0
Repossessed personal property | 0 | 0
Significant Observable Inputs with No Active Market with Identical Characteristics |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral dependent loans | 0 | 0
Other real estate owned | 0 | 0
Repossessed personal property | 0 | 0
Significant Unobservable Inputs |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |
Collateral dependent loans | 12,325 | 63,114
Other real estate owned | 675 | 2,360
Repossessed personal property | $ 180 | $ 857

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