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Goodwill and Intangible Assets, Net - Additional Information (Detail) € in Millions		3 Months Ended		6 Months Ended		12 Months Ended
	Nov. 05, 2013 EUR (€)	Dec. 31, 2015 USD ($)	Dec. 31, 2014 USD ($)	Dec. 31, 2015 USD ($) Unit	Dec. 31, 2014 USD ($)	Jun. 30, 2015 EUR (€)	Jun. 30, 2015 USD ($)	Jun. 01, 2015 USD ($)	Apr. 08, 2015 USD ($)	Feb. 26, 2015 USD ($)	Dec. 30, 2014 USD ($)
Goodwill [Line Items]
Goodwill		$ 1,347,801,000		$ 1,347,801,000			$ 1,287,180,000
Increase (Decrease) in goodwill				70,107,000
Goodwill, unfavorable foreign currency translation				9,500,000
Goodwill impairment charges		0	$ 0	0	$ 0
Net intangible assets		513,829,000		513,829,000			$ 669,667,000
Amortization expense of intangible assets		23,000,000	$ 4,900,000	44,100,000	$ 11,100,000
Lifestyle Audio [Member]
Goodwill [Line Items]
Goodwill		$ 148,462,000		148,462,000
Increase (Decrease) in goodwill				$ (925,000)
Number of reporting units \| Unit				2
Symphony Teleca Corporation [Member]
Goodwill [Line Items]
Goodwill									$ 604,567,000
Increase (Decrease) in goodwill				$ 100,000
Red Bend Ltd. [Member]
Goodwill [Line Items]
Goodwill										$ 187,131,000
Increase (Decrease) in goodwill				100,000
IPSG/VFX [Member]
Goodwill [Line Items]
Goodwill											$ 3,640,000
Increase (Decrease) in goodwill				(4,300,000)
Bang & Olufsen Automotive Assets [Member]
Goodwill [Line Items]
Goodwill								$ 12,240,000
Increase (Decrease) in goodwill				(900,000)
Innovative Systems GmbH [Member]
Goodwill [Line Items]
Dispute settlement amount \| €	€ 16.3
Payments for partial award settlement \| €						€ 16.3
Foreign Currency Translation [Member]
Goodwill [Line Items]
Increase (Decrease) in goodwill				$ 75,200,000