Long-Lived Assets - Additional Information (Detail) (USD $)	3 Months Ended
	Mar. 30, 2014	Mar. 31, 2013
Property, Plant and Equipment [Line Items]
Proceeds from disposal of tangible assets including real estate	$ 12,000	$ 1,077,000
Depreciation expense	9,500,000	9,600,000
Amortization of intangibles	11,741,000	12,977,000
Broadcast Solutions [Member]
Property, Plant and Equipment [Line Items]
Proceeds from disposal of tangible assets including real estate		1,000,000
Loss recognized on the sale		$ 300,000