Employee Benefits - Schedule of Share-based Compensation, Stock Options, Activity (Details) - $ / shares	12 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2022
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of year, Number	148,000	104,000	89,500
Granted, Number	23,500	44,000	14,500
Exercised, Number	(16,000)	0	0
Forfeited, Number	(15,000)
Outstanding at year-end, Number	140,500	148,000	104,000
Options Exercisable, Number	65,800	63,700	44,900
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Options Outstanding, Weighted Average Exercise Price	$ 39.63	$ 36.56	$ 33.77
Granted, Weighted Average Price	40.74	38.58	53.82
Exercised, Weighted Average Price	24.49
Forfeited, Weighted Average Price	42.35
Options Outstanding, Weighted Average Exercise Price	34.43	39.63	36.56
Options Exercisable, Weighted Average Exercise Price	$ 38.44	$ 33.89	$ 31.92