Goodwill and Other Intangible Assets - Schedule of Intangible Assets and Goodwill (Detail) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2020
Goodwill And Intangible Assets Disclosure [Abstract]
Core Deposit Intangibles, Balance	$ 3,705	$ 3,995	$ 5,160
Acquisition of MSB Financial Corp.		690
Amortization	(685)	(980)	(1,165)
Core Deposit Intangibles, Balance	3,020	3,705	3,995
Goodwill	210,895	210,895	210,895
Acquisition of MSB Financial Corp.	0	0	0
Goodwill	$ 210,895	$ 210,895	$ 210,895