Loans - Schedule of Impaired Loans (Detail) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended	12 Months Ended
	Dec. 31, 2022	Jun. 30, 2022	Jun. 30, 2022	Dec. 31, 2022
Receivables [Abstract]
Impaired loans without a valuation allowance	$ 4,194	$ 5,680	$ 5,680	$ 4,194
Impaired loans with a valuation allowance	4,663	4,989	4,989	4,663
Total impaired loans	8,857	10,669	10,669	8,857
Valuation allowance related to impaired loans	1,996	2,419	2,419	1,996
Total non-accrual loans	4,689	5,247	5,247	4,689
Total loans past-due ninety days or more and still accruing	0	0	0	0
Average investment in impaired loans	$ 9,660	$ 9,748	$ 11,258	$ 10,710