Acquisitions - Additional Information (Detail) $ / shares in Units, ₨ in Millions																			1 Months Ended	12 Months Ended
	Jun. 30, 2015 USD ($) shares	Jun. 10, 2015 USD ($)	Jun. 01, 2015 USD ($)	Jun. 01, 2015 EUR (€)	Apr. 08, 2015 USD ($) $ / shares shares	Feb. 26, 2015 USD ($) $ / shares shares	Feb. 01, 2015 USD ($)	Feb. 01, 2015 EUR (€)	Dec. 30, 2014 USD ($)	Jun. 17, 2014 USD ($)	Jun. 13, 2014 USD ($)	Oct. 17, 2013 USD ($)	Oct. 17, 2013 EUR (€)	Apr. 10, 2013 USD ($)	Feb. 28, 2013 USD ($)	Feb. 28, 2013 EUR (€)	Oct. 13, 2012 USD ($)	Jul. 31, 2012 USD ($)	Feb. 28, 2013 USD ($)	Jun. 30, 2015 USD ($) shares	Jun. 30, 2015 EUR (€) shares	Jun. 30, 2014 USD ($) shares	Jun. 30, 2013 USD ($)	Jun. 30, 2015 EUR (€) shares	Jun. 01, 2015 EUR (€)	Feb. 01, 2015 EUR (€)	Oct. 17, 2013 EUR (€)	Feb. 28, 2013 EUR (€)	Jul. 31, 2012 INR (₨)
Business Acquisition [Line Items]
Preliminary valuation of contingent consideration																				$ 2,200,000
Goodwill	$ 1,287,180,000																			1,287,180,000		$ 540,952,000	$ 234,342,000
Assumed debt paid off at closing																				$ 552,298,000		$ 30,000,000	424,079,000
Common stock, shares issued | shares	100,699,641																			100,699,641		98,408,042		100,699,641
Fair value amortized estimated lives											4 months
Indemnification holdback paid	$ 2,600,000																			$ 2,600,000
Payment of contingent consideration																				$ 327,000		$ 0	0
Fair value adjustments to inventories															$ 3,700,000
Fair value adjustments to property, plant and equipment															4,500,000
Covenant Not-to-Compete [Member]
Business Acquisition [Line Items]
Approximate useful life											3 years
Technology [Member]
Business Acquisition [Line Items]
Approximate useful life											5 years
Backlog [Member]
Business Acquisition [Line Items]
Approximate useful life											2 months
Maximum [Member]
Business Acquisition [Line Items]
Approximate useful life																				14 years	14 years
Fair value amortized estimated lives											35 years
Maximum [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Approximate useful life											9 years
Minimum [Member]
Business Acquisition [Line Items]
Approximate useful life																				1 year	1 year
Fair value amortized estimated lives											5 years
Minimum [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Approximate useful life											2 years
S1nn GmbH & Co. KG [Member]
Business Acquisition [Line Items]
Business acquisition date																				Feb. 01, 2015	Feb. 01, 2015
Purchase consideration, total							$ 55,400,000	€ 49,000,000
Holdback Amounts in escrow							4,600,000																			€ 4,100,000
Acquired intangible assets							25,903,000
Acquisition costs incurred																				$ 800,000
Goodwill							20,337,000
Goodwill amount deductible for tax purposes							20,100,000
Purchase price inventories							2,975,000
Property, plant and equipment							2,627,000
S1nn GmbH & Co. KG [Member] | Internally Developed Software [Member]
Business Acquisition [Line Items]
Acquired intangible assets							$ 18,300,000
Approximate useful life							7 years	7 years
S1nn GmbH & Co. KG [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets							$ 6,900,000
Approximate useful life							9 years	9 years
S1nn GmbH & Co. KG [Member] | Covenant Not-to-Compete [Member]
Business Acquisition [Line Items]
Acquired intangible assets							$ 700,000
Approximate useful life							3 years	3 years
IPSG/VFX [Member]
Business Acquisition [Line Items]
Preliminary valuation of contingent consideration	5,800,000
Acquired intangible assets									$ 3,830,000
Goodwill									$ 7,958,000
IPSG/VFX [Member] | Harman International Industries Pty Ltd [Member]
Business Acquisition [Line Items]
Business acquisition date																				Dec. 30, 2014	Dec. 30, 2014
Number of years expected to occur certain days									18 months
Acquisition costs incurred																				$ 300,000
Goodwill									$ 8,000,000
Goodwill amount deductible for tax purposes									8,000,000
Acquisition earn-out contingent payable									5,800,000
Purchase price									$ 5,000,000
Holdback percentage of contingent payable									15.00%
IPSG/VFX [Member] | Technology [Member] | Harman International Industries Pty Ltd [Member]
Business Acquisition [Line Items]
Acquired intangible assets									$ 3,800,000
Approximate useful life									5 years
IPSG/VFX [Member] | Maximum [Member] | Harman International Industries Pty Ltd [Member]
Business Acquisition [Line Items]
Acquisition earn-out contingent payable									$ 8,000,000
Yurbuds [Member]
Business Acquisition [Line Items]
Business acquisition date																				Jun. 17, 2014	Jun. 17, 2014
Cash paid to acquire entity										$ 32,500,000
Number of years expected to occur certain days										18 months
Preliminary valuation of contingent consideration										$ 6,800,000
Acquired intangible assets										$ 4,000,000
Acquisition costs incurred																						500,000
Number of days for working capital adjustment										120 days
Goodwill										$ 35,599,000
Goodwill amount deductible for tax purposes										35,600,000
Acquisition earn-out contingent payable	6,800,000									3,700,000										$ 6,800,000
Purchase price										37,000,000
Purchase price inventories										4,279,000
Property, plant and equipment										2,198,000
Yurbuds [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets										$ 3,100,000
Approximate useful life										7 years
Yurbuds [Member] | Customer Contracts [Member]
Business Acquisition [Line Items]
Acquisition earn-out contingent payable										$ 800,000
Yurbuds [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Acquired intangible assets										$ 900,000
Approximate useful life										25 months
Yurbuds [Member] | Maximum [Member]
Business Acquisition [Line Items]
Acquisition earn-out contingent payable										$ 38,000,000
AMX LLC [Member]
Business Acquisition [Line Items]
Business acquisition date																				Jun. 13, 2014	Jun. 13, 2014
Cash paid to acquire entity											$ 372,900,000
Holdback Amounts in escrow											$ 27,000,000
Number of years expected to occur certain days											36 months
Acquired intangible assets											$ 101,030,000
Acquisition costs incurred																						8,100,000
Goodwill											242,370,000
Goodwill amount deductible for tax purposes											0
Acquisition earn-out contingent payable											25,000,000
Adjustment resulting in reduction to the purchase price											7,900,000									$ 300,000
Purchase price											365,000,000
Purchase price inventories	4,200,000										28,781,000									4,200,000
Property, plant and equipment	2,700,000										28,189,000									$ 2,700,000
AMX LLC [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets											26,700,000
AMX LLC [Member] | Covenant Not-to-Compete [Member]
Business Acquisition [Line Items]
Acquired intangible assets											100,000
AMX LLC [Member] | Working Capital Holdback [Member]
Business Acquisition [Line Items]
Acquisition earn-out contingent payable											2,000,000
AMX LLC [Member] | Technology [Member]
Business Acquisition [Line Items]
Acquired intangible assets											17,000,000
AMX LLC [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Acquired intangible assets											55,700,000
AMX LLC [Member] | Backlog [Member]
Business Acquisition [Line Items]
Acquired intangible assets											$ 1,500,000
Duran Audio BV [Member]
Business Acquisition [Line Items]
Business acquisition date																				Oct. 17, 2013	Oct. 17, 2013
Preliminary valuation of contingent consideration												$ 900,000	€ 700,000								€ 1,900,000
Acquired intangible assets												8,545,000
Acquisition costs incurred																						$ 400,000
Goodwill												15,132,000
Goodwill amount deductible for tax purposes												0
Acquisition earn-out contingent payable	2,200,000																			$ 2,200,000
Purchase price												24,400,000															€ 18,000,000
Purchase price inventories												2,927,000
Property, plant and equipment												$ 656,000
Fair value amortized estimated lives												8 months 15 days	8 months 15 days
Payment for estimated net debt adjustment												$ 800,000	€ 600,000
Additional payment												600,000															500,000
Indemnification holdback paid | €																								€ 2,200,000
Payment of contingent consideration | €																					€ 300,000
Adjustment to Inventories												600,000
Duran Audio BV [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets												1,500,000
Duran Audio BV [Member] | Technology [Member]
Business Acquisition [Line Items]
Acquired intangible assets												2,500,000
Duran Audio BV [Member] | Product Lines [Member]
Business Acquisition [Line Items]
Acquired intangible assets												4,500,000
Duran Audio BV [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Acquired intangible assets												$ 40,000
Approximate useful life												1 year	1 year
Duran Audio BV [Member] | Maximum [Member]
Business Acquisition [Line Items]
Acquisition earn-out contingent payable												$ 16,400,000															€ 12,000,000
Duran Audio BV [Member] | Maximum [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Approximate useful life												26 months 15 days	26 months 15 days
Duran Audio BV [Member] | Maximum [Member] | Technology [Member]
Business Acquisition [Line Items]
Approximate useful life												38 months 15 days	38 months 15 days
Duran Audio BV [Member] | Maximum [Member] | Product Lines [Member]
Business Acquisition [Line Items]
Approximate useful life												86 months 15 days	86 months 15 days
Duran Audio BV [Member] | Minimum [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Approximate useful life												2 months 15 days	2 months 15 days
Duran Audio BV [Member] | Minimum [Member] | Technology [Member]
Business Acquisition [Line Items]
Approximate useful life												26 months 15 days	26 months 15 days
Duran Audio BV [Member] | Minimum [Member] | Product Lines [Member]
Business Acquisition [Line Items]
Approximate useful life												62 months 15 days	62 months 15 days
Martin Professional A/S [Member]
Business Acquisition [Line Items]
Business acquisition date																				Feb. 28, 2013	Feb. 28, 2013
Cash paid to acquire entity															92,800,000	€ 70,600,000
Acquired intangible assets															$ 36,299,000				$ 36,299,000
Acquisition costs incurred																							$ 2,300,000
Number of days for working capital adjustment															45 days	45 days
Goodwill															$ 61,557,000				61,557,000
Goodwill amount deductible for tax purposes															0				0
Adjustment resulting in reduction to the purchase price															2,000,000
Purchase price | €																												€ 110,000,000
Purchase price inventories															41,104,000				41,104,000
Property, plant and equipment															9,421,000				9,421,000
Payment for estimated net debt adjustment															50,500,000
Martin Professional A/S [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets															13,200,000				13,200,000
Martin Professional A/S [Member] | Technology [Member]
Business Acquisition [Line Items]
Acquired intangible assets															700,000				$ 700,000
Approximate useful life																			2 years
Martin Professional A/S [Member] | Backlog [Member]
Business Acquisition [Line Items]
Acquired intangible assets															2,300,000				$ 2,300,000
Approximate useful life																			4 months
Martin Professional A/S [Member] | Non-Amortized Indefinite Trade Name [Member]
Business Acquisition [Line Items]
Acquired intangible assets															$ 20,100,000				$ 20,100,000
Martin Professional A/S [Member] | Maximum [Member]
Business Acquisition [Line Items]
Fair value amortized estimated lives																			4 years
Martin Professional A/S [Member] | Maximum [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Approximate useful life																			7 years
Martin Professional A/S [Member] | Minimum [Member]
Business Acquisition [Line Items]
Fair value amortized estimated lives																			12 months
Martin Professional A/S [Member] | Minimum [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Approximate useful life																			6 years
iOnRoad [Member]
Business Acquisition [Line Items]
Business acquisition date																				Apr. 10, 2013	Apr. 10, 2013
Goodwill														$ 2,200,000
Purchase price														8,500,000
iOnRoad [Member] | Technology [Member]
Business Acquisition [Line Items]
Acquired intangible assets														$ 8,700,000
Approximate useful life														5 years
Deferred tax liability														$ 2,200,000
Interchain Solutions Private Limited [Member]
Business Acquisition [Line Items]
Business acquisition date																				Jul. 31, 2012	Jul. 31, 2012
Cash paid to acquire entity																	$ 500,000	$ 300,000
Purchase price																		800,000											₨ 45.0
Goodwill																		600,000
Acquired intangible assets																		$ 400,000
Red Bend Ltd. [Member]
Business Acquisition [Line Items]
Business acquisition date																				Feb. 26, 2015	Feb. 26, 2015
Cash paid to acquire entity						$ 71,000,000
Holdback Amounts in escrow						$ 16,000,000
Number of years expected to occur certain days						18 months
Preliminary valuation of contingent consideration	16,700,000					$ 16,700,000
Acquired intangible assets						$ 50,300,000
Number of days for working capital adjustment						90 days
Goodwill						$ 187,031,000
Goodwill amount deductible for tax purposes						0
Acquisition earn-out contingent payable	30,000,000																			$ 30,000,000
Total revaluation adjustment						4,000,000
Purchase price						195,300,000
Common stock shares consideration, amount						124,300,000
Acquisition, third party debt assumed and paid off						5,600,000
Consideration Transferred placed in escrow to be used for Post Closing Adjustment						1,000,000
Post-Closing Adjustment						$ 400,000
Shares of common stock transferred | shares						897,424
Fair market value of transferred shares of common stock | $ / shares						$ 137.78
Issuance of common shares from treasury stock | shares																				839,287	839,287
Restricted stock units vested | shares																				58,137	58,137
Property, plant and equipment						$ 1,261,000
Red Bend Ltd. [Member] | Pre-acquisition [Member]
Business Acquisition [Line Items]
Fair value of awards associated with services						600,000
Red Bend Ltd. [Member] | Post-acquisition [Member]
Business Acquisition [Line Items]
Fair value of awards associated with services						1,900,000
Red Bend Ltd. [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets						$ 4,000,000
Approximate useful life						5 years
Red Bend Ltd. [Member] | Technology [Member]
Business Acquisition [Line Items]
Acquired intangible assets						$ 46,000,000
Approximate useful life						7 years
Red Bend Ltd. [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Acquired intangible assets						$ 300,000
Approximate useful life						10 months
Red Bend Ltd. [Member] | Maximum [Member]
Business Acquisition [Line Items]
Acquisition earn-out contingent payable						$ 30,000,000
Southern Vision Systems Inc [Member]
Business Acquisition [Line Items]
Business acquisition date																				Jun. 10, 2015	Jun. 10, 2015
Purchase consideration, total		$ 20,000,000
Final adjustments delivered period		90 days
Cash paid to acquire entity		$ 19,500,000
Holdback Amounts in escrow		$ 2,400,000
Number of years expected to occur certain days		18 months
Preliminary valuation of contingent consideration	0	$ 0
Acquired intangible assets		8,360,000
Acquisition costs incurred																				$ 300,000
Goodwill		13,165,000
Acquisition earn-out contingent payable	10,000,000																			$ 10,000,000
Purchase price inventories		911,000
Property, plant and equipment		177,000
Southern Vision Systems Inc [Member] | Internally Developed Software [Member]
Business Acquisition [Line Items]
Acquired intangible assets		$ 7,700,000
Approximate useful life		5 years
Southern Vision Systems Inc [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Acquired intangible assets		$ 100,000
Approximate useful life		6 months
Southern Vision Systems Inc [Member] | Distributor Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets		$ 600,000
Approximate useful life		2 years
Southern Vision Systems Inc [Member] | Maximum [Member]
Business Acquisition [Line Items]
Acquisition earn-out contingent payable		$ 10,000,000
Bang & Olufsen [Member]
Business Acquisition [Line Items]
Business acquisition date																				Jun. 01, 2015	Jun. 01, 2015
Purchase consideration, total			$ 165,700,000	€ 150,800,000
Holdback Amounts in escrow | €																									€ 12,500,000
Number of years expected to occur certain days			15 months	15 months
Acquired intangible assets			$ 129,700,000
Acquisition costs incurred																				$ 800,000
Number of days for working capital adjustment			60 days	60 days
Goodwill			$ 13,202,000
Goodwill amount deductible for tax purposes			13,200,000
Purchase price inventories			5,699,000
Property, plant and equipment			7,065,000
Bang & Olufsen [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets			$ 129,700,000
Approximate useful life			7 years	7 years
Symphony Teleca Corporation [Member]
Business Acquisition [Line Items]
Business acquisition date																				Apr. 08, 2015	Apr. 08, 2015
Cash paid to acquire entity					$ 299,700,000
Preliminary valuation of contingent consideration	$ 24,900,000
Acquired intangible assets					317,900,000
Acquisition costs incurred					$ 13,800,000
Number of days for working capital adjustment					75 days
Goodwill					$ 529,367,000
Goodwill amount deductible for tax purposes					0
Total base purchase price					720,800,000
Estimated purchase price paid at closing					491,500,000
Number of shares of common stock to acquire entity					191,800,000
Approximately third-party debt assumed					115,600,000
Assumed debt paid off at closing					115,600,000
Acquired of cash					61,900,000
Acquisition earn-out contingent payable					24,900,000
Adjustment resulting in reduction to the purchase price					$ 0
Common stock, shares issued | shares					1,410,161
Common stock, closing price per share | $ / shares					$ 136.00
Total revaluation adjustment					$ 500,000
Property, plant and equipment					24,954,000
Symphony Teleca Corporation [Member] | Accrued Liabilities [Member]
Business Acquisition [Line Items]
Total base purchase price					229,300,000
Symphony Teleca Corporation [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets					298,100,000
Symphony Teleca Corporation [Member] | Covenant Not-to-Compete [Member]
Business Acquisition [Line Items]
Acquired intangible assets					$ 1,000,000
Approximate useful life					4 years
Symphony Teleca Corporation [Member] | Technology [Member]
Business Acquisition [Line Items]
Acquired intangible assets					$ 4,200,000
Approximate useful life					3 years
Symphony Teleca Corporation [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Acquired intangible assets					$ 14,600,000
Approximate useful life					9 months
Symphony Teleca Corporation [Member] | Restricted Cash [Member] | Non Controlling Interest [Member]
Business Acquisition [Line Items]
Cash paid to acquire entity					$ 14,800,000
Symphony Teleca Corporation [Member] | Maximum [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Approximate useful life					16 years
Symphony Teleca Corporation [Member] | Minimum [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Approximate useful life					7 years