Inventories (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Inventories:
Raw Materials	$ 64,647	$ 57,442
Work-in-process	19,983	15,676
Finished Goods	57,005	49,486
Net inventory	141,635	122,604
Excess and Obsolete
Inventories:
Inventory write-downs to net realizable value	12,200	10,400	$ 9,400
Inventories written-down	$ 11,900	$ 4,500