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Loans Receivable - Summary of loans by year of origination, internally assigned credit grades and risk characteristics (Detail) - USD ($) $ in Thousands | 9 Months Ended |
--- | --- | ---
Sep. 30, 2023 | Dec. 31, 2022
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total | $ 1,500,811 | $ 1,372,824
Commercial Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Current period gross charge-offs 2023 | 0 |
Current period gross charge-offs 2022 | 0 |
Current period gross charge-offs 2021 | 0 |
Current period gross charge-offs 2020 | 0 |
Current period gross charge-offs 2019 | 0 |
Current period gross charge-offs Prior | 1,718 |
Current period gross charge-offs Revolving Loans | 0 |
Current period gross charge-offs Total | 1,718 |
Commercial And Industrial [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Current period gross charge-offs 2023 | 0 |
Current period gross charge-offs 2022 | 0 |
Current period gross charge-offs 2021 | 0 |
Current period gross charge-offs 2020 | 0 |
Current period gross charge-offs 2019 | 0 |
Current period gross charge-offs Prior | 2 |
Current period gross charge-offs Revolving Loans | 0 |
Current period gross charge-offs Total | 2 |
Construction Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Current period gross charge-offs 2023 | 0 |
Current period gross charge-offs 2022 | 0 |
Current period gross charge-offs 2021 | 0 |
Current period gross charge-offs 2020 | 0 |
Current period gross charge-offs 2019 | 0 |
Current period gross charge-offs Prior | 148 |
Current period gross charge-offs Revolving Loans | 0 |
Current period gross charge-offs Total | 148 |
Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total |  | 1,362,973
Special Mention [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total |  | 3,392
Substandard [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
Total |  | $ 6,459
Loans Receivable [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 51,117 |
2022 | 246,822 |
2021 | 216,279 |
2020 | 73,689 |
2019 | 187,719 |
Prior | 498,524 |
Revolving Loans | 226,661 |
Total | 1,500,811 |
Loans Receivable [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 47,531 |
2022 | 235,341 |
2021 | 119,682 |
2020 | 54,153 |
2019 | 173,138 |
Prior | 435,279 |
Revolving Loans | 15,164 |
Total | 1,080,288 |
Loans Receivable [Member] | Commercial And Industrial [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 1,749 |
2022 | 6,041 |
2021 | 1,143 |
2020 | 1,987 |
2019 | 8,019 |
Prior | 26,654 |
Revolving Loans | 6,564 |
Total | 52,157 |
Loans Receivable [Member] | Construction Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 792 |
2022 | 4,409 |
2021 | 89,500 |
2020 | 14,682 |
2019 | 5,000 |
Prior | 4,414 |
Revolving Loans | 202,027 |
Total | 320,824 |
Loans Receivable [Member] | Residential FirstLien Mortgage [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 0 |
2022 | 993 |
2021 | 5,635 |
2020 | 2,863 |
2019 | 1,562 |
Prior | 28,629 |
Revolving Loans | 0 |
Total | 39,682 |
Loans Receivable [Member] | Residential FirstLien Mortgage [Member] | Performing Financial Instruments [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 0 |
2022 | 993 |
2021 | 5,635 |
2020 | 2,863 |
2019 | 1,562 |
Prior | 28,520 |
Revolving Loans | 0 |
Total | 39,573 |
Loans Receivable [Member] | Residential FirstLien Mortgage [Member] | Nonperforming Financial Instruments [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 109 |
Revolving Loans | 0 |
Total | 109 |
Loans Receivable [Member] | Home Equity Loan [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 1,045 |
2022 | 38 |
2021 | 319 |
2020 | 4 |
2019 | 0 |
Prior | 3,548 |
Revolving Loans | 2,906 |
Total | 7,860 |
Loans Receivable [Member] | Home Equity Loan [Member] | Performing Financial Instruments [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 1,045 |
2022 | 38 |
2021 | 319 |
2020 | 4 |
2019 | 0 |
Prior | 3,548 |
Revolving Loans | 2,906 |
Total | 7,860 |
Loans Receivable [Member] | Home Equity Loan [Member] | Nonperforming Financial Instruments [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 0 |
Revolving Loans | 0 |
Total | 0 |
Loans Receivable [Member] | Pass [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 51,117 |
2022 | 246,822 |
2021 | 216,279 |
2020 | 73,689 |
2019 | 187,719 |
Prior | 488,309 |
Revolving Loans | 226,661 |
Total | 1,490,596 |
Loans Receivable [Member] | Pass [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 47,531 |
2022 | 235,341 |
2021 | 119,682 |
2020 | 54,153 |
2019 | 173,138 |
Prior | 428,018 |
Revolving Loans | 15,164 |
Total | 1,073,027 |
Loans Receivable [Member] | Pass [Member] | Commercial And Industrial [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 1,749 |
2022 | 6,041 |
2021 | 1,143 |
2020 | 1,987 |
2019 | 8,019 |
Prior | 23,809 |
Revolving Loans | 6,564 |
Total | 49,312 |
Loans Receivable [Member] | Pass [Member] | Construction Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 792 |
2022 | 4,409 |
2021 | 89,500 |
2020 | 14,682 |
2019 | 5,000 |
Prior | 4,414 |
Revolving Loans | 202,027 |
Total | 320,824 |
Loans Receivable [Member] | Special Mention [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 3,462 |
Revolving Loans | 0 |
Total | 3,462 |
Loans Receivable [Member] | Special Mention [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 2,776 |
Revolving Loans | 0 |
Total | 2,776 |
Loans Receivable [Member] | Special Mention [Member] | Commercial And Industrial [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 686 |
Revolving Loans | 0 |
Total | 686 |
Loans Receivable [Member] | Special Mention [Member] | Construction Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 0 |
Revolving Loans | 0 |
Total | 0 |
Loans Receivable [Member] | Substandard [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 6,753 |
Revolving Loans | 0 |
Total | 6,753 |
Loans Receivable [Member] | Substandard [Member] | Commercial Real Estate [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 4,485 |
Revolving Loans | 0 |
Total | 4,485 |
Loans Receivable [Member] | Substandard [Member] | Commercial And Industrial [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 2,159 |
Revolving Loans | 0 |
Total | 2,159 |
Loans Receivable [Member] | Substandard [Member] | Construction Loans [Member] |  |
Financing Receivable, Credit Quality Indicator [Line Items] |  |
2023 | 0 |
2022 | 0 |
2021 | 0 |
2020 | 0 |
2019 | 0 |
Prior | 0 |
Revolving Loans | 0 |
Total | $ 0 |

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