Long-Lived Assets - Additional Information (Detail) (USD $)	3 Months Ended
Mar. 31, 2013	Apr. 01, 2012
Depreciation and Amortization Expenses For Property Plant And Equipment [Line Items]
Proceeds from sale of PP&E, including real estate	$ 1,077,000
Depreciation expense	9,600,000	8,700,000
Amortization of intangibles	12,977,000	3,084,000
Broadcast Solutions [Member]
Depreciation and Amortization Expenses For Property Plant And Equipment [Line Items]
Proceeds from sale of PP&E, including real estate	1,000,000
Gain or loss recognized on the sale	$ 300,000

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

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The amount of expense recognized in the current period that reflects the allocation of the cost of tangible assets over the assets' useful lives. Includes production and non-production related depreciation.

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- Definition

The cash inflow from the sale of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale.

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