Goodwill and Identified Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) $ in Thousands	9 Months Ended
	Oct. 02, 2015 USD ($)
Goodwill [Line Items]
Balance at beginning of period	$ 197,884
Foreign currency translation adjustment	(59)
Balance at end of period	197,825
Video [Member]
Goodwill [Line Items]
Balance at beginning of period	136,975
Foreign currency translation adjustment	(41)
Balance at end of period	136,934
Cable Edge [Member]
Goodwill [Line Items]
Balance at beginning of period	60,909
Foreign currency translation adjustment	(18)
Balance at end of period	$ 60,891