Acquisitions - Additional Information (Detail) - USD ($)				3 Months Ended		4 Months Ended	9 Months Ended
		Jun. 11, 2015	Oct. 31, 2014	Oct. 04, 2015	Sep. 28, 2014	Oct. 04, 2015	Oct. 04, 2015	Sep. 28, 2014	Dec. 31, 2014
Business Acquisition [Line Items]
Contingent consideration				$ 14,447,000		$ 14,447,000	$ 14,447,000		$ 895,000
Revenues				465,994,000	$ 478,010,000		1,321,133,000	$ 1,324,587,000
Income (loss) before income taxes	[1],[2]			87,408,000	100,670,000		261,981,000	220,189,000
Net income					$ 76,112,000		197,745,000	162,474,000
Contingent consideration adjustment							(2,600,000)	(630,000)
Avionics Interface Technologies, LLC
Business Acquisition [Line Items]
Total purchase price			$ 21,243,000
Cash paid to acquire outstanding common and preferred stock			19,400,000
Contingent consideration			1,800,000
Arrangement range of outcomes value high			$ 2,100,000
Discount rate			4.70%
Contingent consideration adjustment				(1,000,000)			(1,000,000)
Goodwill, expected tax deduction			$ 10,500,000
Universal Robots
Business Acquisition [Line Items]
Total purchase price		$ 317,686,000
Cash paid to acquire outstanding common and preferred stock		283,900,000
Contingent consideration		33,800,000
Arrangement range of outcomes value high		65,000,000
Goodwill, not deductible for tax purposes		$ 227,000,000
Revenues				16,100,000		19,800,000
Income (loss) before income taxes				$ (4,800,000)		$ (6,500,000)
Universal Robots | Fair Value Adjustment to Inventory
Business Acquisition [Line Items]
Net income							(1,600,000)	1,600,000
Universal Robots | Acquisition Related Costs
Business Acquisition [Line Items]
Net income							$ (1,000,000)	$ 1,000,000
Universal Robots | Discount Rate One
Business Acquisition [Line Items]
Discount rate		6.00%
Universal Robots | Discount Rate Two
Business Acquisition [Line Items]
Discount rate		8.00%
Universal Robots | Discount Rate Three
Business Acquisition [Line Items]
Discount rate		10.00%

[1] Included in the income (loss) before income taxes for each of the segments are charges related to inventory and other.

[2] Interest income, interest expense, and other (income) expense, net are included in Corporate and Eliminations.