Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - shares	12 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2018
Employee Stock Purchase Plans, shares	20,733	15,812	21,920
Exercise of stock options, shares	0	12,500	31,050
Issuance of deferred shares, shares	542,279	314,711	253,241
Treasury shares repurchased to satisfy tax withholding obligations	181,081	79,111	52,950
Open market purchase of treasury shares, shares	1,047,606	310,532	0