Supplemental Financial Information - Consolidated Statements of Operations (Details) - USD ($) $ in Thousands	12 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2016
Supplemental Financial Information Disclosure [Abstract]
Interest expense on debt	$ (14,959)	$ (17,302)	$ (17,460)
Foreign currency transaction loss	(986)	(1,267)	(2,014)
Other (expense) income	(3,279)	(149)	1,179
Total other expense, net	$ (19,224)	$ (18,718)	$ (18,295)