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Securities - Additional Information (Detail) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2022	Mar. 31, 2021	Mar. 31, 2022	Mar. 31, 2021	Jun. 30, 2021
Debt Securities, Available-for-sale [Line Items]
Mortgage-backed securities with a book value	$ 231,125		$ 231,125		$ 186,589
Fair Value	$ 218,639		$ 218,639		189,891
Percentage of equity securities	10.00%		10.00%
Repurchase agreements	$ 7,263		$ 7,263		6,245
Gross gains from sales of available for sale securities			0	$ 327
Gross losses from sales of available for sale securities			0	7
Tax benefit to net realized gains (losses)	0	$ 33	0	$ 91
Investments in debt and marketable equity securities	$ 179,350		$ 179,350		$ 85,118
Temporarily impaired debt securities percentage of investment securities portfolio	82.00%		82.00%		45.00%
Asset Pledged as Collateral with Right [Member]
Debt Securities, Available-for-sale [Line Items]
Assets, Fair Value Disclosure	$ 116,110		$ 116,110		$ 96,429
Maturity Overnight [Member]
Debt Securities, Available-for-sale [Line Items]
Repurchase agreements	7,300		7,300
US Treasury Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Mortgage-backed securities with a book value	8,804		8,804		990
Fair Value	8,688		8,688		996
Investments in debt and marketable equity securities	7,694		7,694
U.S. Government and Federal Agency and Government Sponsored Enterprises (GSEs) [Member]
Debt Securities, Available-for-sale [Line Items]
Mortgage-backed securities with a book value	9,489		9,489		7,522
Fair Value	9,395		9,395		8,039
Investments in debt and marketable equity securities	3,324		3,324
Mortgage-backed Securities - GSE Residential [Member]
Debt Securities, Available-for-sale [Line Items]
Mortgage-backed securities with a book value	196,180		196,180		167,711
Fair Value	184,751		184,751		170,415
Investments in debt and marketable equity securities	153,637		153,637		79,162
Debt Securities [Member]
Debt Securities, Available-for-sale [Line Items]
Investments in debt and marketable equity securities	179,350		179,350		85,118
Small Business Administration [Member]
Debt Securities, Available-for-sale [Line Items]
Mortgage-backed securities with a book value	15,542		15,542		9,115
Fair Value	14,695		14,695		$ 9,190
Investments in debt and marketable equity securities	$ 14,695		$ 14,695

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