Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - shares	3 Months Ended
	Sep. 30, 2018	Sep. 30, 2017
Exercise of stock options, shares	12,500	0
Issuance of deferred shares, shares	221,775	163,201
Employee Stock Purchase Plan, shares	4,323	7,121
Other treasury shares purchases, shares	72,604	42,909