Income Taxes - Reconciliation of income tax expense at statutory rate (Details) - USD ($) $ in Thousands	3 Months Ended												12 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Dec. 31, 2024	Sep. 30, 2024	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, 2025	Jun. 30, 2024	Jun. 30, 2023
Reconciliation of income tax expense at the statutory rate
Tax at statutory rate													$ 15,539	$ 13,253	$ 10,387
Nontaxable municipal income													(332)	(471)	(327)
State tax, net of Federal benefit													653	412	46
Cash surrender value of Bank-owned life insurance													(438)	(401)	(318)
Tax credit benefits													(710)	(12)	(19)
Other, net													704	147	457
TOTAL INCOME TAXES	$ 3,351	$ 4,139	$ 4,547	$ 3,379	$ 3,430	$ 2,837	$ 3,173	$ 3,488	$ 3,939	$ 578	$ 3,267	$ 2,442	$ 15,416	$ 12,928	$ 10,226