Operating Segment, Geographic Information and Significant Customers - Summary of Performance of Operations by Reportable Segment (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended		9 Months Ended
	Mar. 31, 2015	Mar. 31, 2014	Mar. 31, 2015	Mar. 31, 2014
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	$ (59,578)	$ (53,393)	$ (170,728)	$ (155,051)
Adjusted EBITDA	11,515	7,773	30,224	16,333
MCE
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(52,748)	(43,041)	(153,110)	(128,835)
MDS
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(6,714)	(8,884)	(16,860)	(25,245)
Segment Reconciling Items [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(116)	(1,468)	(758)	(971)
Intersegment Eliminations [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	2,357	4,568	3,994	8,415
Intersegment Eliminations [Member] | MCE
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	2,325	4,568	3,750	8,415
Intersegment Eliminations [Member] | MDS
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	32	0	244	0
Operating Segments [Member] | MCE
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(55,073)	(47,609)	(156,860)	(137,250)
Adjusted EBITDA	12,073	6,763	29,872	13,188
Operating Segments [Member] | MDS
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	(6,746)	(8,884)	(17,104)	(25,245)
Adjusted EBITDA	614	1,242	1,384	3,370
Segment Reconciling Items and Intersegment Eliminations [Member]
Segment Reporting, Revenue Reconciling Item [Line Items]
Net revenues	2,241	3,100	3,236	7,444
Adjusted EBITDA	$ (1,172)	$ (232)	$ (1,032)	$ (225)