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Loans and Allowance for Loan Losses - Additional Information (Details) | 12 Months Ended
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Dec. 31, 2021 USD ($) loan | Dec. 31, 2020 USD ($) loan | Dec. 31, 2019 USD ($) loan
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Loans, related parties | $ 0 | $ 0 |
Recorded investment in troubled debt restructurings | 313,000 | 333,000 |
Specific reserves to loans classified as TDRs | $ 313,000 | $ 333,000 |
Loans identified as TDRs | loan | 0 | 0 | 0
Financing receivable, modifications, subsequent default, recorded investment | $ 0 | $ 0 | $ 0
Gross loans receivable | 1,314,019,000 | 1,099,736,000 |
SBA PPP Loan |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Total loans funded | 154,500,000 |  |
Loans forgiven | 118,700,000 |  |
Home mortgage |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Gross loans receivable | 173,303,000 | 128,212,000 |
SBA loans—non-real estate |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Gross loans receivable | 55,759,000 | $ 75,151,000 |
SBA loans—non-real estate | SBA PPP Loan |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Gross loans receivable | $ 40,600,000 |  |
Payment Deferral | Total deferments under the CARES Act |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Number of processed loan deferments | loan | 226 |  |
Gross loans receivable | $ 250,758,000 |  |
Payment Deferral | Payment resumed or paid off |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Number of loans | loan | 223 |  |
Gross loans receivable | $ 245,714,000 |  |
Payment Deferral | Remaining deferments |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Remaining deferments, Number of accounts | loan | 3 |  |
Gross loans receivable | $ 5,044,000 |  |
Payment Deferral | Home mortgage | Total deferments under the CARES Act |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Number of processed loan deferments | loan | 69 |  |
Gross loans receivable | $ 30,205,000 |  |
Payment Deferral | Home mortgage | Payment resumed or paid off |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Number of loans | loan | 69 |  |
Gross loans receivable | $ 30,205,000 |  |
Payment Deferral | Home mortgage | Remaining deferments |  |  |
Loans And Leases Receivable Disclosure [Line Items] |  |  |
Remaining deferments, Number of accounts | loan | 0 |  |
Gross loans receivable | $ 0 |  |

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