Inventories (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Mar. 31, 2018	Mar. 31, 2017	Mar. 31, 2018	Mar. 31, 2017	Jun. 30, 2017
Inventories:
Raw materials	$ 63,325		$ 63,325		$ 57,442
Work-in-process	18,009		18,009		15,676
Finished goods	51,956		51,956		49,486
Net inventory	133,290		133,290		122,604
Excess and Obsolete
Inventories:
Inventory adjustments	(6,100)		(6,100)		$ (4,500)
Provision for inventories	$ 4,000	$ 2,300	$ 8,300	$ 7,700