Acquisitions - Additional Information (Detail)	12 Months Ended			12 Months Ended		1 Months Ended						1 Months Ended		12 Months Ended			1 Months Ended	12 Months Ended		1 Months Ended					1 Months Ended		12 Months Ended		1 Months Ended	12 Months Ended			12 Months Ended
	Jun. 30, 2012 USD ($)	Jun. 30, 2013 USD ($)	Jun. 30, 2011 USD ($)	Jun. 30, 2013 Minimum [Member]	Jun. 30, 2013 Maximum [Member]	Oct. 13, 2012 Interchain [Member] USD ($)	Jul. 31, 2012 Interchain [Member] USD ($)	Jun. 30, 2013 Interchain [Member] USD ($)	Jul. 31, 2012 Interchain [Member] INR	Jun. 30, 2012 Mwm Acquisition [Member] USD ($)	Jul. 22, 2011 Mwm Acquisition [Member] USD ($)	Feb. 28, 2013 Martin Professional A/S [Member] USD ($) D	Feb. 28, 2013 Martin Professional A/S [Member] EUR (€)	Jun. 30, 2013 Martin Professional A/S [Member] USD ($)	Jun. 30, 2013 Martin Professional A/S [Member] Minimum [Member]	Jun. 30, 2013 Martin Professional A/S [Member] Maximum [Member]	Apr. 10, 2013 iOnRoad [Member] USD ($)	Jun. 30, 2013 iOnRoad [Member] USD ($)	Jun. 30, 2013 iOnRoad [Member] Maximum [Member]	Dec. 31, 2012 MWM Acoustics LLC [Member] USD ($)	Jul. 22, 2011 MWM Acoustics LLC [Member] USD ($) D	Feb. 10, 2011 3dB [Member] USD ($)	Jun. 30, 2011 3dB [Member] USD ($)	Sep. 13, 2010 Aha [Member] USD ($)	Jul. 22, 2011 Customer Relationships [Member] Mwm Acquisition [Member] USD ($)	Jun. 30, 2013 Customer Relationships [Member] Martin Professional A/S [Member] USD ($)	Jun. 30, 2013 Customer Relationships [Member] Martin Professional A/S [Member] Minimum [Member]	Jun. 30, 2013 Customer Relationships [Member] Martin Professional A/S [Member] Maximum [Member]	Jul. 22, 2011 Technology [Member] Mwm Acquisition [Member] USD ($)	Jun. 30, 2013 Technology [Member] Martin Professional A/S [Member] USD ($)	Jun. 30, 2013 Technology [Member] iOnRoad [Member] USD ($)	Jun. 30, 2013 Non-amortized Indefinite Tradename [Member] Martin Professional A/S [Member] USD ($)	Jun. 30, 2013 Backlog [Member] Martin Professional A/S [Member] USD ($)
Business Acquisition [Line Items]
Purchase price							$ 800,000		45,000,000				€ 110,000,000				$ 8,500,000				$ 80,000,000	$ 3,000,000		$ 1,800,000
Preliminary valuation of contingent consideration	2,083,000																1,200,000				22,100,000
Number of years expected to occur certain events																			2 years
Goodwill	180,811,000	234,342,000	119,357,000									56,650,000						2,000,000			79,757,000
Acquired intangible assets												36,299,000									20,600,000										8,400,000
Approximate useful life				10 months	17 years													5 years							10 years		6 years	7 years	4 years	2 years			4 months
Number of days for working capital adjustment												45	45								60
Cash paid to acquire entity						500,000	300,000					92,800,000	70,600,000							8,000,000	72,000,000	2,300,000
Purchase price assumption approximate debt												50,500,000
Adjustment resulting in reduction to the purchase price												2,000,000
Goodwill							600,000				79,800,000			56,700,000
Acquired intangible assets							400,000																		19,200,000	13,200,000			1,400,000	700,000		20,100,000	2,300,000
Purchase price inventories												46,332,000		3,700,000							1,062,000
Property, plant and equipment												9,420,000		4,500,000							273,000
Fair value amortized estimated lives															12 months	4 years
Acquisition costs incurred														2,300,000
Acquisition earn-out contingent payable							900,000		50,000,000
Financial targets achievement period end							September 1, 2013 and September 2, 2014														June 30, 2014
Contingent consideration related to earn-out								300,000
Accrued working capital adjustments																					100,000
Acquisition earn-out contingent payable																					57,000,000
Approximate goodwill amount deductible for tax purposes											35,600,000
Acquisition costs incurred										900,000													100,000	100,000
Purchase price allocation, working capital																						500,000
Percentage of cash paid on purchase price																						60.00%
Cash paid for acquisition excluding working capital adjustment																						1,800,000
Remainder of the purchase price payable in installments																						$ 1,200,000