Condensed Consolidated Statements of Changes in Stockholders' Equity (Parenthetical) - shares	3 Months Ended
	Sep. 30, 2017	Sep. 30, 2016
Exercise of stock options, shares	0	4,400
Issuance of deferred shares, shares	163,201	335,295
Employee Stock Purchase Plan, shares	7,121	4,982
Other treasury shares purchases, shares	42,909	113,762