Goodwill and Intangible Assets, Net - Additional Information (Detail)	12 Months Ended											0 Months Ended	12 Months Ended
	Jun. 30, 2014 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2012 USD ($)	Jun. 30, 2014 AMX LLC [Member] USD ($)	Jun. 30, 2014 Duran Audio BV [Member] USD ($)	Jun. 30, 2014 Yurbuds [Member] USD ($)	Jun. 30, 2014 Martin Professional A/S [Member] USD ($)	Jun. 30, 2013 Martin Professional A/S [Member] USD ($)	Jun. 30, 2014 iOnRoad [Member] USD ($)	Jun. 30, 2013 iOnRoad [Member] USD ($)	Jun. 30, 2013 Interchain Solutions Private Limited [Member] USD ($)	Nov. 05, 2013 Innovative Systems GmbH [Member] EUR (€)	Jun. 30, 2014 Innovative Systems GmbH [Member] USD ($)
Goodwill [Line Items]
Accumulated amount of goodwill impairment	$ 330,000,000
Goodwill	540,952,000	234,342,000	180,811,000
Increase in goodwill	294,569,000	59,280,000		244,300,000	15,100,000	30,100,000	4,900,000	56,700,000	100,000	2,000,000	600,000		8,100,000
Dispute settlement amount												16,300,000
Additional contingent purchase price	8,052,000												8,100,000
Net intangible assets	182,000,000	60,100,000
Amortization expense of intangible assets	$ 13,200,000	$ 12,600,000	$ 12,200,000