Acquisitions - Additional Information (Detail)														12 Months Ended
	Mar. 10, 2016 USD ($)	Jun. 10, 2015 USD ($)	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 ($)	Oct. 17, 2013 EUR (€)	Jun. 30, 2016 USD ($) shares	Jun. 30, 2016 EUR (€)	Jun. 30, 2015 USD ($) shares	Jun. 30, 2014 USD ($)	Jun. 30, 2015 EUR (€) shares	Jun. 01, 2015 EUR (€)	Feb. 01, 2015 EUR (€)	Oct. 17, 2013 EUR (€)
Business Acquisition [Line Items]
Preliminary valuation of contingent consideration																$ 6,800,000
Assumed debt paid off at closing														$ 38,550,000		$ 552,298,000	$ 30,000,000
Common stock, shares issued | shares														101,157,320		100,699,641		100,699,641
Goodwill														$ 1,510,279,000		$ 1,287,180,000	540,952,000
Fair value amortized estimated lives											4 months
Measurement Period Adjustments [Member]
Business Acquisition [Line Items]
Cumulative reduction in amortization expense														$ 1,500,000
Technology [Member]
Business Acquisition [Line Items]
Approximate useful life											5 years
Covenant Not To Compete
Business Acquisition [Line Items]
Approximate useful life											3 years
Backlog [Member]
Business Acquisition [Line Items]
Approximate useful life											2 months
Maximum [Member]
Business Acquisition [Line Items]
Approximate useful life														17 years	17 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
TowerSec Ltd. [Member]
Business Acquisition [Line Items]
Business acquisition date														Mar. 10, 2016	Mar. 10, 2016
Purchase consideration, total	$ 45,000,000
Cash paid to acquire entity	37,900,000
Holdback Amounts in escrow	2,300,000
Deferred consideration amount	$ 3,000,000
Number of years expected to occur certain days	18 months
Approximately third-party debt assumed	$ 2,600,000
Preliminary valuation of contingent consideration	27,700,000
Acquired intangible assets	4,600,000
Acquisition costs incurred														$ 600,000
Increase (decrease) to purchase price														$ 100,000
Goodwill amount deductible for tax purposes	0
Goodwill	69,538,000
Property, plant and equipment	205,000
TowerSec Ltd. [Member] | Internally Developed Software
Business Acquisition [Line Items]
Acquired intangible assets	$ 4,600,000
Approximate useful life	6 years
TowerSec 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
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		$ 3,000,000												$ 3,000,000
Acquired intangible assets		10,750,000
Acquisition costs incurred																300,000
Increase (decrease) to purchase price														100,000
Goodwill amount deductible for tax purposes		0
Acquisition earn-out contingent payable														$ 10,000,000
Goodwill		14,718,000
Purchase price inventories		855,000
Property, plant and equipment		177,000
Southern Vision Systems Inc [Member] | Internally Developed Software
Business Acquisition [Line Items]
Acquired intangible assets		$ 10,000,000
Approximate useful life		5 years
Southern Vision Systems Inc [Member] | Distributor Relationships
Business Acquisition [Line Items]
Acquired intangible assets		$ 700,000
Approximate useful life		2 years
Southern Vision Systems Inc [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Acquired intangible assets		$ 100,000
Approximate useful life		6 months
Bang & Olufsen Automotive Assets [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
Increase (decrease) to purchase price														$ 500,000	€ 500,000
Goodwill amount deductible for tax purposes			13,000,000
Goodwill			12,992,000
Purchase price inventories			5,395,000
Property, plant and equipment			7,643,000
Bang & Olufsen Automotive Assets [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
Purchase consideration, total					$ 720,800,000
Cash paid to acquire entity					299,700,000
Holdback Amounts in escrow														42,000,000
Approximately third-party debt assumed					115,600,000
Acquired intangible assets					202,900,000
Acquisition costs incurred														13,800,000
Goodwill amount deductible for tax purposes					0
Estimated purchase price paid at closing					491,500,000
Number of shares of common stock to acquire entity					191,800,000
Assumed debt paid off at closing					115,600,000
Acquired of cash					61,900,000
Estimated adjustments to purchase price					$ 0
Business combination additional payments, purchase price														231,100,000
Business combination additional payments, earn out														23,300,000
Final base price adjustment														0
Common stock, shares issued | shares					1,410,161
Common stock, closing price per share | $ / shares					$ 136.00
Goodwill					$ 598,849,000
Property, plant and equipment					24,954,000
Symphony Teleca Corporation [Member] | Restricted Cash | Non Controlling Interest [Member]
Business Acquisition [Line Items]
Cash paid to acquire entity					14,800,000
Symphony Teleca Corporation [Member] | Escrow One [Member]
Business Acquisition [Line Items]
Holdback Amounts in escrow placed other														31,200,000
Symphony Teleca Corporation [Member] | Escrow Two [Member]
Business Acquisition [Line Items]
Holdback Amounts in escrow placed other														21,000,000
Symphony Teleca Corporation [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Acquired intangible assets					$ 14,600,000
Approximate useful life					9 years
Symphony Teleca Corporation [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets					$ 183,100,000
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] | Covenant Not To Compete
Business Acquisition [Line Items]
Acquired intangible assets					$ 1,000,000
Approximate useful life					4 years
Symphony Teleca Corporation [Member] | Maximum [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Approximate useful life					11 years
Symphony Teleca Corporation [Member] | Minimum [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Approximate useful life					12 years
Red Bend Ltd. [Member]
Business Acquisition [Line Items]
Business acquisition date						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						$ 20,900,000								18,400,000		16,700,000
Acquired intangible assets						30,500,000
Acquisition costs incurred																$ 1,200,000
Goodwill amount deductible for tax purposes						0
Acquisition earn-out contingent payable														$ 30,000,000
Goodwill						205,907,000
Purchase price						195,300,000
Common stock shares consideration, amount						124,300,000
Acquisition, third party debt assumed and paid off						5,600,000
Post-Closing Adjustment						$ 400,000
Shares of common stock transferred | shares | shares						897,424
Issuance of common shares from treasury stock | shares | shares						839,287										839,287
Issuance of common shares from treasury stock | shares | shares						58,137
Fair market value of transferred shares of common stock | $ / shares | $ / shares						$ 137.78
Total revaluation adjustment						$ 4,000,000
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] | Trade Names [Member]
Business Acquisition [Line Items]
Acquired intangible assets						$ 100,000
Approximate useful life						10 months
Red Bend Ltd. [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets						$ 900,000
Approximate useful life						8 years
Red Bend Ltd. [Member] | Technology [Member]
Business Acquisition [Line Items]
Acquired intangible assets						$ 29,500,000
Approximate useful life						8 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 amount deductible for tax purposes							20,100,000
Goodwill							20,337,000
Purchase price inventories							2,975,000
Property, plant and equipment							2,627,000
S1nn GmbH & Co. KG [Member] | Internally Developed Software
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
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														$ 0
IPSG/VFX [Member] | Harman International Industries Pty Ltd [Member]
Business Acquisition [Line Items]
Business acquisition date														Dec. 30, 2014	Dec. 30, 2014
Acquisition earn-out contingent payable									$ 0
Acquired intangible assets									1,781,000
Acquisition costs incurred																$ 300,000
Goodwill amount deductible for tax purposes									3,600,000
Goodwill									3,640,000
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									$ 1,800,000
Approximate useful life									5 years
IPSG/VFX [Member] | Maximum [Member] | Harman International Industries Pty Ltd [Member]
Business Acquisition [Line Items]
Number of years expected to occur certain days									18 months
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
Acquired intangible assets										$ 4,000,000
Acquisition costs incurred																	500,000
Goodwill amount deductible for tax purposes										35,600,000
Acquisition earn-out contingent payable										3,700,000				$ 6,800,000
Goodwill										35,599,000
Purchase price										$ 37,000,000
Number of days for working capital adjustment										120 days
Purchase price inventories										$ 4,279,000
Property, plant and equipment										2,198,000
Yurbuds [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Acquired intangible assets										$ 900,000
Approximate useful life										25 years
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] | 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 amount deductible for tax purposes											0
Acquisition earn-out contingent payable											25,000,000
Final base price adjustment											7,900,000					300,000
Goodwill											242,370,000
Purchase price											365,000,000
Purchase price inventories											28,781,000			$ 4,200,000
Property, plant and equipment											28,189,000			$ 2,700,000
AMX LLC [Member] | Trade Names [Member]
Business Acquisition [Line Items]
Acquired intangible assets											55,700,000
AMX LLC [Member] | Customer Relationships [Member]
Business Acquisition [Line Items]
Acquired intangible assets											26,700,000
AMX LLC [Member] | Technology [Member]
Business Acquisition [Line Items]
Acquired intangible assets											17,000,000
AMX LLC [Member] | Covenant Not To Compete
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] | 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	$ 1,600,000
Acquired intangible assets												8,545,000
Acquisition costs incurred																	$ 400,000
Goodwill amount deductible for tax purposes												0
Goodwill												15,132,000
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																$ 2,600,000		€ 2,200,000
Adjustment to Inventories												600,000
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] | 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] | 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