Loans Receivable - Schedule Of Carrying Value Of Collateral Dependent Individually Analyzed Loans (Detail) - Individually Analyzed Loans [Member] - USD ($) $ in Thousands		3 Months Ended	9 Months Ended	12 Months Ended
		Mar. 31, 2022	Mar. 31, 2022	Jun. 30, 2021
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans		$ 65,069		$ 59,243
Balance			$ 976	6,512
One-to Four-Family Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans	[1]	4,581		7,612
Balance	[1]		196	420
Home Equity Loans [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans	[1]	59		31
Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans		60,429		51,600
Balance			780	6,092
Commercial Loan [Member] | Non-Residential Mortgage [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans	[2]	27,384		32,891
Balance	[2]		119	4,724
Commercial Loan [Member] | Commercial Business [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans	[3]	176		183
Commercial Loan [Member] | Construction [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans		1,791
Multi-Family Mortgage Member | Commercial Loan [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Number of loans		$ 31,078		18,526
Balance			$ 661	$ 1,368

[1] Secured by one- to four-family residential properties.

[2] Secured by income-producing nonresidential property.

[3] Secured by business assets.