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Loans Receivable - Troubled Debt Restructurings, Disaggregated by Type of Concession and by Loan Type (Detail) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Nonaccrual TDRs |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | $ 2,888 | $ 17,065
Nonaccrual TDRs | Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 2,764 | 16,921
Nonaccrual TDRs | Commercial and Industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 124 | 144
Nonaccrual TDRs | Deferral of Principal |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 346 | 1,095
Nonaccrual TDRs | Deferral of Principal | Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 346 | 1,095
Nonaccrual TDRs | Deferral of Principal and Interest |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 2,170 | 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 | 2,046 | 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 | 124 | 144
Nonaccrual TDRs | Reduction of Principal and Interest |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 372 | 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 | $ 372 | 12,492
Accrual TDRs |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend |  | 7,930
Accrual TDRs | Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend |  | 7,870
Accrual TDRs | Commercial and Industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend |  | 60
Accrual TDRs | Deferral of Principal |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend |  | 513
Accrual TDRs | Deferral of Principal | Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend |  | 513
Accrual TDRs | Reduction of Principal and Interest |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend |  | 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 |  | 4
Accrual TDRs | Extension of Maturity |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend |  | 7,346
Accrual TDRs | Extension of Maturity | Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend |  | 7,290
Accrual TDRs | Extension of Maturity | Commercial and Industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend |  | $ 56

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