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Summary of Carrying Values, Estimated Fair Values and Fair Value Measurement Levels of Financial Instruments (Detail) - Fair Value, Measurements, Nonrecurring - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018
--- | --- | ---
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Certain impaired loans | [1] | $ 42,767 | $ 38,213
Other assets | [2] | 1,481 | 1,265
Total |  | 44,248 | 39,478
Significant Unobservable Inputs (Level 3) |  |  |
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items] |  |  |
Certain impaired loans | [1] | 42,767 | 38,213
Other assets | [2] | 1,481 | 1,265
Total |  | $ 44,248 | $ 39,478
[1] | Represents the fair value of impaired loans, based on the value of the collateral.
[2] | Represents the fair value of repossessed assets, based on the appraised value of the collateral subsequent to its initial classification as repossessed assets.

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