Employee Benefits - Schedule of Share-based Compensation, Stock Options, Activity (Details) - $ / shares	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Outstanding at beginning of year
Weighted Average Price	$ 26.35	$ 22.18	$ 9.35
Number	51,000	33,500	44,000
Granted
Weighted Average Price	$ 37.40	$ 34.35	$ 37.31
Number	19,500	17,500	13,500
Exercised
Weighted Average Price	$ 6.38		$ 7.18
Number	10,000		24,000
Outstanding at year-end
Weighted Average Price	$ 33.22	$ 26.35	$ 22.18
Number	60,500	51,000	33,500
Options exercisable at year-end
Weighted Average Price	$ 26.31	$ 14.73	$ 10.57
Number	18,900	20,700	16,000