Operating Segments and Geographic Information - Operating Segment Information (Detail) (USD $) In Thousands, unless otherwise specified	3 Months Ended								12 Months Ended
	Dec. 31, 2014	Sep. 28, 2014	Jun. 29, 2014	Mar. 30, 2014	Dec. 31, 2013	Sep. 29, 2013	Jun. 30, 2013	Mar. 31, 2013	Dec. 31, 2014	Dec. 31, 2013	Dec. 31, 2012
Segment Reporting Information [Line Items]
External customer revenues	$ 608,910	$ 610,774	$ 600,891	$ 487,690	$ 509,751	$ 522,478	$ 529,491	$ 507,473	$ 2,308,265	$ 2,069,193	$ 1,840,739
Depreciation and amortization									(102,162)	(94,451)	(59,355)
Operating income	43,271	58,011	12,326	49,511	49,174	53,935	53,913	44,240	163,119	201,262	108,497
Total assets	3,262,827				2,751,753				3,262,827	2,751,753	2,584,583
Acquisition of property, plant and equipment									45,459	40,209	41,010
Reportable Segment [Member]
Segment Reporting Information [Line Items]
External customer revenues									2,308,265	2,069,193	1,840,739
Affiliate revenues									12,829	12,865	8,573
Total revenues									2,321,094	2,082,058	1,849,312
Depreciation and amortization									(102,162)	(94,451)	(57,887)
Asset impairment and loss on sale of assets											(33,676)
Operating income									163,046	196,132	100,932
Total assets	960,782				833,585				960,782	833,585	825,123
Acquisition of property, plant and equipment									42,442	38,791	39,879
Reportable Segment [Member] | Broadcast Solutions [Member]
Segment Reporting Information [Line Items]
External customer revenues									916,632	663,900	356,320
Affiliate revenues									1,381	933	691
Total revenues									918,013	664,833	357,011
Depreciation and amortization									(67,372)	(64,420)	(23,184)
Operating income									4,093	15,099	(11,657)
Total assets	430,991				294,454				430,991	294,454	272,520
Acquisition of property, plant and equipment									17,912	10,526	8,844
Reportable Segment [Member] | Enterprise Connectivity Solutions [Member]
Segment Reporting Information [Line Items]
External customer revenues									455,795	493,129	496,857
Affiliate revenues									8,467	9,823	6,467
Total revenues									464,262	502,952	503,324
Depreciation and amortization									(14,331)	(12,988)	(16,057)
Asset impairment and loss on sale of assets											(1,468)
Operating income									47,715	48,753	40,056
Total assets	206,377				223,073				206,377	223,073	234,882
Acquisition of property, plant and equipment									12,574	11,749	13,013
Reportable Segment [Member] | Industrial Connectivity Solutions [Member]
Segment Reporting Information [Line Items]
External customer revenues									682,374	680,643	670,112
Affiliate revenues									2,927	1,901	1,129
Total revenues									685,301	682,544	671,241
Depreciation and amortization									(12,318)	(11,408)	(10,970)
Asset impairment and loss on sale of assets											(2,435)
Operating income									80,435	92,562	72,366
Total assets	255,997				259,400				255,997	259,400	263,293
Acquisition of property, plant and equipment									10,053	14,496	13,077
Reportable Segment [Member] | Industrial IT Solutions [Member]
Segment Reporting Information [Line Items]
External customer revenues									253,464	231,521	219,679
Affiliate revenues									54	208	286
Total revenues									253,518	231,729	219,965
Depreciation and amortization									(8,141)	(5,635)	(4,848)
Operating income									30,803	38,440	32,807
Total assets	67,417				56,658				67,417	56,658	54,428
Acquisition of property, plant and equipment									1,903	2,020	4,597
All Other [Member]
Segment Reporting Information [Line Items]
External customer revenues									0		97,771
Affiliate revenues									0
Total revenues									0		97,771
Depreciation and amortization									0		(2,828)
Asset impairment and loss on sale of assets									0		(29,773)
Operating income									0	1,278	(32,640)
Total assets	0								0
Acquisition of property, plant and equipment									$ 0		$ 348