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Loans and Allowance for Credit Losses - Summary of Impaired Loans (Detail) $ in Thousands	12 Months Ended
	Jun. 30, 2022 USD ($)
Financing Receivable, Impaired [Line Items]
Recorded Balance	$ 1,385
Unpaid Principal Balance	1,385
Specific Allowance	0
Average Investment in Impaired Loans	1,401
Interest Income Recognized	19
Interest on Cash Basis	17
Commercial [Member]
Financing Receivable, Impaired [Line Items]
Recorded Balance, Loans without a specific valuation allowance	35
Unpaid Principal Balance, Loans without a specific valuation allowance	35
Average Investment in Impaired Loans, Loans without a specific valuation allowance	40
Interest Income Recognized, Loans without a specific valuation allowance	4
Interest on Cash Basis, Loans without a specific valuation allowance	4
Recorded Balance	35
Unpaid Principal Balance	35
Average Investment in Impaired Loans	40
Interest Income Recognized	4
Interest on Cash Basis	4
One- to four-family [Member]
Financing Receivable, Impaired [Line Items]
Recorded Balance, Loans without a specific valuation allowance	1,350
Unpaid Principal Balance, Loans without a specific valuation allowance	1,350
Average Investment in Impaired Loans, Loans without a specific valuation allowance	1,361
Interest Income Recognized, Loans without a specific valuation allowance	15
Interest on Cash Basis, Loans without a specific valuation allowance	13
Recorded Balance	1,350
Unpaid Principal Balance	1,350
Average Investment in Impaired Loans	1,361
Interest Income Recognized	15
Interest on Cash Basis	$ 13

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Average amount of investment of impaired financing receivables with related allowance for credit losses and without a related allowance for credit losses.

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