Employee Benefits - Share-based Compensation Arrangement by Share-based Payment Award, Options, Vested and Expected to Vest, Outstanding and Exercisable (Details)	12 Months Ended
	Jun. 30, 2022 $ / shares shares
26 mo.
Weighted Average Remaining Contractual Life	26 months
Options Outstanding, Number | shares	10,000
Options Outstanding, Weighted Average Exercise Price	$ 17.55
Options Exercisable, Number | shares	10,000
Options Exercisable, Weighted Average Exercise Price	$ 17.55
67 mo.
Weighted Average Remaining Contractual Life	67 months
Options Outstanding, Number | shares	13,500
Options Outstanding, Weighted Average Exercise Price	$ 37.31
Options Exercisable, Number | shares	10,800
Options Exercisable, Weighted Average Exercise Price	$ 37.31
78 mo.
Weighted Average Remaining Contractual Life	78 months
Options Outstanding, Number | shares	17,500
Options Outstanding, Weighted Average Exercise Price	$ 34.35
Options Exercisable, Number | shares	10,500
Options Exercisable, Weighted Average Exercise Price	$ 34.35
92 mo.
Weighted Average Remaining Contractual Life	92 months
Options Outstanding, Number | shares	19,500
Options Outstanding, Weighted Average Exercise Price	$ 37.40
Options Exercisable, Number | shares	7,800
Options Exercisable, Weighted Average Exercise Price	$ 37.40
103 mo.
Weighted Average Remaining Contractual Life	103 months
Options Outstanding, Number | shares	29,000
Options Outstanding, Weighted Average Exercise Price	$ 34.91
Options Exercisable, Number | shares	5,800
Options Exercisable, Weighted Average Exercise Price	$ 34.91
115 mo.
Weighted Average Remaining Contractual Life	115 months
Options Outstanding, Number | shares	14,500
Options Outstanding, Weighted Average Exercise Price	$ 53.82
Options Exercisable, Weighted Average Exercise Price	$ 53.82