Quarterly report pursuant to Section 13 or 15(d)

Loans - Summary of Loans by Class Modified as Troubled Debt Restructurings (Detail)

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Loans - Summary of Loans by Class Modified as Troubled Debt Restructurings (Detail)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
USD ($)
Loan
Sep. 30, 2020
USD ($)
Loan
Dec. 31, 2019
USD ($)
Loan
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Number of Loans | Loan 1 3 8
Pre- Modification Outstanding Recorded Investment $ 2,004 $ 4,005 $ 54,071
Post- Modification Outstanding Recorded Investment $ 1,526 $ 3,253 $ 54,891
Commercial and Industrial Loans      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Number of Loans | Loan     2
Pre- Modification Outstanding Recorded Investment     $ 12,779
Post- Modification Outstanding Recorded Investment     $ 12,562
Consumer Loans      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Number of Loans | Loan     1
Pre- Modification Outstanding Recorded Investment     $ 549
Post- Modification Outstanding Recorded Investment     $ 531
Real Estate Loans      
Financing Receivable, Troubled Debt Restructuring [Line Items]      
Number of Loans | Loan 1 3 5
Pre- Modification Outstanding Recorded Investment $ 2,004 $ 4,005 $ 40,743
Post- Modification Outstanding Recorded Investment $ 1,526 $ 3,253 $ 41,798