Acquisitions - Additional Information (Details) - USD ($)				3 Months Ended		9 Months Ended
	Apr. 25, 2018	Feb. 08, 2018	May 31, 2017	Sep. 30, 2018	Oct. 01, 2017	Sep. 30, 2018	Oct. 01, 2017
Business Acquisition [Line Items]
Severance, restructuring, and acquisition integration costs				$ 11,688,000	$ 16,679,000	$ 57,010,000	$ 32,839,000
Amortization of intangibles				25,533,000	27,162,000	74,990,000	77,944,000
Net-Tech Technology, Inc.
Business Acquisition [Line Items]
Percentage of outstanding shares acquired	100.00%
Acquisition price	$ 8,500,000
Snell Advanced Media
Business Acquisition [Line Items]
Percentage of outstanding shares acquired		100.00%
Acquisition price		$ 104,500,000
Maximum earnout consideration		31,400,000
Estimated earnout consideration		29,300,000
Long-term debt		19,315,000
Receivables		17,182,000
Tax basis in acquired goodwill		$ 0
Revenue of acquiree				25,300,000		77,200,000
Severance, restructuring, and acquisition integration costs				7,100,000		36,600,000
Amortization of intangibles				3,700,000		8,700,000
Inventory adjustment				600,000		1,800,000
Snell Advanced Media | Acquisition-related Costs
Business Acquisition [Line Items]
Severance, restructuring, and acquisition integration costs					7,100,000		36,600,000
Amortization of intangibles					200,000		2,000,000
Inventory adjustment					$ 200,000		$ 1,700,000
Thinklogical Holdings LLC
Business Acquisition [Line Items]
Percentage of outstanding shares acquired		100.00%
Acquisition price			$ 165,800,000
Receivables			4,355,000
Tax basis in acquired goodwill			$ 43,300,000
Revenue of acquiree				15,200,000		32,600,000
Loss before taxes of acquiree				(2,600,000)		500,000
Severance, restructuring, and acquisition integration costs						500,000
Amortization of intangibles				$ 3,200,000		$ 9,500,000
Business acquisition, goodwill, tax deductible period						15 years