Quarterly report pursuant to Section 13 or 15(d)

Off-Balance Sheet Commitments - Allowance for Loan Losses and Allowance for Off Balance Sheet Items (Detail)

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Off-Balance Sheet Commitments - Allowance for Loan Losses and Allowance for Off Balance Sheet Items (Detail) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2020
Mar. 31, 2019
Dec. 31, 2019
Loss Contingencies [Line Items]      
Balance at beginning of period $ 2,397 $ 1,439  
Adjusted balance as of January 1, 2020 2,062 1,439  
Provision (income) for credit losses 823 (339)  
Balance at end of period $ 2,885 $ 1,100  
ASU 2016-13      
Loss Contingencies [Line Items]      
Adjustment related to adoption of ASU 2016-13     $ (335)