Operating Segments - Operating Segment Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Apr. 01, 2012	Dec. 31, 2012
Operating Statistics [Line Items]
Revenues	$ 507,473	$ 439,600
Operating income (loss)	44,240	37,126
Total assets	2,647,979		2,584,583
Operating Segments [Member]
Operating Statistics [Line Items]
Revenues	507,473	439,600
Affiliate revenues	2,972	2,146
Operating income (loss)	42,655	35,064
Total assets	791,232	681,747
Broadcast Solutions [Member] | Operating Segments [Member]
Operating Statistics [Line Items]
Revenues	155,586	70,057
Affiliate revenues	109	159
Operating income (loss)	(146)	1,168
Total assets	271,515	97,469
Enterprise Connectivity Solutions [Member] | Operating Segments [Member]
Operating Statistics [Line Items]
Revenues	116,627	124,352
Affiliate revenues	2,469	1,649
Operating income (loss)	8,835	9,752
Total assets	212,809	220,581
Industrial Connectivity Solutions [Member] | Operating Segments [Member]
Operating Statistics [Line Items]
Revenues	176,721	169,633
Affiliate revenues	364	299
Operating income (loss)	24,449	18,973
Total assets	249,076	238,346
Industrial IT Solutions [Member] | Operating Segments [Member]
Operating Statistics [Line Items]
Revenues	58,539	50,882
Affiliate revenues	30	39
Operating income (loss)	9,517	5,713
Total assets	57,832	53,157
All Other [Member] | Operating Segments [Member]
Operating Statistics [Line Items]
Revenues		24,676
Operating income (loss)		(542)
Total assets		$ 72,194