Employee Benefits - Schedule of Share-based Compensation, Stock Options, Activity (Details) - $ / shares	12 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2023
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding [Roll Forward]
Outstanding at beginning of year, Number	140,500	148,000	104,000
Granted, Number	12,000	23,500	44,000
Exercised, Number		(16,000)
Forfeited, Number		(15,000)
Outstanding at year-end, Number	152,500	140,500	148,000
Options Exercisable, Number	88,500	65,800	63,700
Share-Based Compensation Arrangement by Share-Based Payment Award, Options, Outstanding, Weighted Average Exercise Price [Abstract]
Options Outstanding, Weighted Average Exercise Price	$ 34.43	$ 39.63	$ 36.56
Granted, Weighted Average Price	60.42	40.74	38.58
Exercised, Weighted Average Price		24.49
Forfeited, Weighted Average Price		42.35
Options Outstanding, Weighted Average Exercise Price	42.76	34.43	39.63
Options Exercisable, Weighted Average Exercise Price	$ 39.51	$ 38.44	$ 33.89