Stock-Based Compensation (Employee Restricted Stock Grant Details) (Details) - Employee Restricted Stock [Member] - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]
Restricted stock granted (in shares)	27	12	28
Grant date fair value	$ 3,218	$ 1,591	$ 2,923
Weighted average grant date fair value per award (in dollars per share)	$ 121.09	$ 134.07	$ 102.89