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Loans - Interest Income on Non-Accrual Loans, Excluding PCD Loans (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Financing Receivable, Impaired [Line Items] |  |  |  |
Total interest income on non-accrual loans | $ 119 | $ 46 | $ 159 | $ 95
Real estate loans: | Multifamily |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Total interest income on non-accrual loans | 24 | 19 | 48 | 33
Real estate loans: | Commercial mortgage |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Total interest income on non-accrual loans | 70 | 25 | 82 | 50
Real estate loans: | One-to-four family residential mortgage |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Total interest income on non-accrual loans | 7 | 0 | 10 | 6
Real estate loans: | Home equity and lines of credit |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Total interest income on non-accrual loans | 11 | 0 | 11 | 2
Commercial and industrial loans |  |  |  |
Financing Receivable, Impaired [Line Items] |  |  |  |
Total interest income on non-accrual loans | $ 7 | $ 2 | $ 8 | $ 4

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