Quarterly report pursuant to Section 13 or 15(d)

Loans - Troubled Debt Restructurings (Detail)

v3.21.1
Loans - Troubled Debt Restructurings (Detail) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Nonaccrual TDRs    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend $ 15,189 $ 17,065
Nonaccrual TDRs | Real Estate    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 15,050 16,921
Nonaccrual TDRs | Commercial and Industrial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 139 144
Nonaccrual TDRs | Deferral of Principal    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 446 1,095
Nonaccrual TDRs | Deferral of Principal | Real Estate    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 446 1,095
Nonaccrual TDRs | Deferral of Principal and Interest    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 3,269 3,478
Nonaccrual TDRs | Deferral of Principal and Interest | Real Estate    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 3,130 3,334
Nonaccrual TDRs | Deferral of Principal and Interest | Commercial and Industrial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 139 144
Nonaccrual TDRs | Reduction of Principal and Interest    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 11,474 12,492
Nonaccrual TDRs | Reduction of Principal and Interest | Real Estate    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 11,474 12,492
Accrual TDRs    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 8,407 7,930
Accrual TDRs | Real Estate    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 8,363 7,870
Accrual TDRs | Commercial and Industrial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 44 60
Accrual TDRs | Deferral of Principal    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 1,103 513
Accrual TDRs | Deferral of Principal | Real Estate    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 1,103 513
Accrual TDRs | Reduction of Principal and Interest    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 3 71
Accrual TDRs | Reduction of Principal and Interest | Real Estate    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend   67
Accrual TDRs | Reduction of Principal and Interest | Commercial and Industrial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 3 4
Accrual TDRs | Extension of Maturity    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 7,301 7,346
Accrual TDRs | Extension of Maturity | Real Estate    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend 7,260 7,290
Accrual TDRs | Extension of Maturity | Commercial and Industrial    
Financing Receivable, Troubled Debt Restructuring [Line Items]    
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend $ 41 $ 56