Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - shares	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Open market purchase of treasury shares, shares	0	0	654,958
Employee Stock Purchase Plans, shares	21,920	16,609	17,304
Exercise of stock options, shares	31,050	24,813	68,037
Issuance of deferred shares, shares	253,241	396,530	631,443
Treasury shares repurchased to satisfy tax withholding obligations	52,950	134,535	205,504