Annual report pursuant to Section 13 and 15(d)

Fair Value Measurements - Assets and Liabilities Measured at Fair Value on Non-Recurring Basis (Detail)

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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
Dec. 31, 2020
Dec. 31, 2019
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Collateral dependent loans $ 63,114 $ 31,049
Other real estate owned 2,360 63
Repossessed personal property 857  
Bank-owned premises   1,900
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  
Bank-owned premises   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  
Bank-owned premises   0
Significant Unobservable Inputs    
Fair Value, Assets and Liabilities Measured on Recurring and Nonrecurring Basis [Line Items]    
Collateral dependent loans 63,114 31,049
Other real estate owned 2,360 63
Repossessed personal property $ 857  
Bank-owned premises   $ 1,900