Goodwill and Identified Intangible Assets - Changes in Carrying Amount of Goodwill (Detail) $ in Thousands	6 Months Ended
	Jul. 03, 2015 USD ($)
Goodwill [Line Items]
Balance at beginning of period	$ 197,884
Foreign currency translation adjustment	19
Balance at end of period	197,903
Video [Member]
Goodwill [Line Items]
Balance at beginning of period	136,975
Foreign currency translation adjustment	13
Balance at end of period	136,988
Cable Edge [Member]
Goodwill [Line Items]
Balance at beginning of period	60,909
Foreign currency translation adjustment	6
Balance at end of period	$ 60,915