Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - shares	12 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2015
Open market purchase of treasury shares, shares	0	654,958	0
Employee Stock Purchase Plans, shares	16,609	17,304	13,243
Exercise of stock options, shares	24,813	68,037	55,200
Issuance of deferred shares, shares	396,530	631,443	326,763
Treasury shares repurchased to satisfy tax withholding obligations	134,535	205,504	105,058