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Fair Value Measurements and Disclosures - Schedule of Significant Unobservable Inputs Used in Fair Value Measurement of Level 3 Assets (Detail) - Nonrecurring - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
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Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Impaired loans | $ 7,365 | $ 8,723
Foreclosed assets and ORE | 4,156 | 1,558
Level 3 |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Impaired loans | 7,365 | 8,723
Foreclosed assets and ORE | $ 4,156 | $ 1,558
Level 3 | Minimum | Collateral discounts and discount rates |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Collateral discounts and discount rates (percent) | 0.00% | 0.00%
Level 3 | Minimum | Collateral discounts and estimated costs to sell |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Collateral discounts and estimated costs to sell (percent) | 6.00% | 6.00%
Level 3 | Maximum | Collateral discounts and discount rates |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Collateral discounts and discount rates (percent) | 84.00% | 100.00%
Level 3 | Maximum | Collateral discounts and estimated costs to sell |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Collateral discounts and estimated costs to sell (percent) | 61.00% | 68.00%
Level 3 | Weighted Average | Collateral discounts and discount rates |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Collateral discounts and discount rates (percent) | 13.00% | 12.00%
Level 3 | Weighted Average | Collateral discounts and estimated costs to sell |  |
Fair Value Measurement Inputs and Valuation Techniques [Line Items] |  |
Collateral discounts and estimated costs to sell (percent) | 14.00% | 20.00%

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- Definition Fair value portion of loan receivable, including, but not limited to, mortgage loans held for investment, finance receivables held for investment, policy loans on insurance contracts. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 10 -URI http://asc.fasb.org/subtopic&trid=2196772 + Details
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