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Loans and Allowance for Loan Losses - Summary of Impaired Loans (Detail) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended | 12 Months Ended
--- | --- | --- | ---
Dec. 31, 2021 | Dec. 31, 2021 | Jun. 30, 2022
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Balance | $ 1,136 | $ 1,136 | $ 1,385
Unpaid Principal Balance | 1,136 | 1,136 | 1,385
Specific Allowance | 0 | 0 | 0
Average Investment in Impaired Loans | 1,141 | 1,144 | 1,401
Interest Income Recognized | 7 | 12 | 19
Interest on Cash Basis | 5 | 10 | 17
Commercial [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Balance, Loans without a specific valuation allowance | 41 | 41 | 35
Unpaid Principal Balance, Loans without a specific valuation allowance | 41 | 41 | 35
Average Investment in Impaired Loans, Loans without a specific valuation allowance | 42 | 43 | 40
Interest Income Recognized, Loans without a specific valuation allowance | 1 | 2 | 4
Interest on Cash Basis, Loans without a specific valuation allowance | 1 | 2 | 4
Recorded Balance | 41 | 41 | 35
Unpaid Principal Balance | 41 | 41 | 35
Average Investment in Impaired Loans | 42 | 43 | 40
Interest Income Recognized | 1 | 2 | 4
Interest on Cash Basis | 1 | 2 | 4
Consumer [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Balance, Loans without a specific valuation allowance | 12 | 12 |
Unpaid Principal Balance, Loans without a specific valuation allowance | 12 | 12 |
Average Investment in Impaired Loans, Loans without a specific valuation allowance | 14 | 14 |
Recorded Balance | 12 | 12 |
Unpaid Principal Balance | 12 | 12 |
Average Investment in Impaired Loans | 14 | 14 |
One- to four-family [Member] |  |  |
Financing Receivable, Impaired [Line Items] |  |  |
Recorded Balance, Loans without a specific valuation allowance | 1,083 | 1,083 | 1,350
Unpaid Principal Balance, Loans without a specific valuation allowance | 1,083 | 1,083 | 1,350
Average Investment in Impaired Loans, Loans without a specific valuation allowance | 1,085 | 1,087 | 1,361
Interest Income Recognized, Loans without a specific valuation allowance | 6 | 10 | 15
Interest on Cash Basis, Loans without a specific valuation allowance | 4 | 8 | 13
Recorded Balance | 1,083 | 1,083 | 1,350
Unpaid Principal Balance | 1,083 | 1,083 | 1,350
Average Investment in Impaired Loans | 1,085 | 1,087 | 1,361
Interest Income Recognized | 6 | 10 | 15
Interest on Cash Basis | $ 4 | $ 8 | $ 13

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