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Loans Receivable - Troubled Debt Restructurings, Disaggregated by Type of Concession and by Loan Type (Detail) - USD ($) $ in Thousands | Dec. 31, 2022 | Dec. 31, 2021
--- | --- | ---
Nonaccrual TDRs |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | $ 445 | $ 2,888
Nonaccrual TDRs | Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 339 | 2,764
Nonaccrual TDRs | Commercial and Industrial |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 106 | 124
Nonaccrual TDRs | Deferral of Principal |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 255 | 346
Nonaccrual TDRs | Deferral of Principal | Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 255 | 346
Nonaccrual TDRs | Deferral of Principal and Interest |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 106 | 2,170
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
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 | 106 | 124
Nonaccrual TDRs | Reduction of Principal and Interest |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 84 | 372
Nonaccrual TDRs | Reduction of Principal and Interest | Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 84 | $ 372
Accrual TDRs |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 1,185 |
Accrual TDRs | Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 1,185 |
Accrual TDRs | Deferral of Principal and Interest |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | 1,185 |
Accrual TDRs | Deferral of Principal and Interest | Real Estate |  |
Financing Receivable, Troubled Debt Restructuring [Line Items] |  |
Financing Receivable, Troubled Debt Restructuring, Commitment to Lend | $ 1,185 |

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- Definition Amount of unfunded portion of contractual agreement to lend funds to borrower for financing receivable modified as troubled debt restructuring. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 310 -SubTopic 40 -Section 50 -Paragraph 1 -URI https://asc.fasb.org/extlink&oid=121585226&loc=d3e18794-111554 + Details
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