Long-Lived Assets - Additional Information (Detail) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 27, 2015	Sep. 28, 2014	Sep. 27, 2015	Sep. 28, 2014
Depreciation and Amortization Expenses For Property Plant And Equipment [Line Items]
Proceeds from disposal of tangible assets			$ 145,000	$ 1,773,000
Depreciation expense	$ 11,800,000	$ 10,700,000	35,100,000	31,600,000
Amortization of intangible assets	$ 25,669,000	$ 15,203,000	$ 78,090,000	42,739,000
Broadcast Solutions [Member]
Depreciation and Amortization Expenses For Property Plant And Equipment [Line Items]
Proceeds from disposal of tangible assets				1,800,000
Gain (loss) recognized on the sale				$ 0