Income Taxes - Reconciliation of income tax expense at statutory rate (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Jun. 30, 2024	Mar. 31, 2024	Dec. 31, 2023	Sep. 30, 2023	Jun. 30, 2023	Mar. 31, 2023	Dec. 31, 2022	Sep. 30, 2022	Jun. 30, 2022	Mar. 31, 2022	Dec. 31, 2021	Sep. 30, 2021	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Income Tax Expense (Benefit), Effective Income Tax Rate Reconciliation, Amount [Abstract]
Tax at statutory rate													$ 13,253	$ 10,387	$ 12,580
Nontaxable municipal income													(471)	(327)	(349)
State tax, net of Federal benefit													412	46	812
Cash surrender value of Bank-owned life insurance													(401)	(318)	(245)
Tax credit benefits													(12)	(19)	(45)
Other, net													147	457	(18)
TOTAL INCOME TAXES	$ 3,430	$ 2,837	$ 3,173	$ 3,488	$ 3,939	$ 578	$ 3,267	$ 2,442	$ 3,602	$ 2,358	$ 3,288	$ 3,487	$ 12,928	$ 10,226	$ 12,735