Acquisitions - Additional Information (Details) - USD ($)			3 Months Ended
	Apr. 25, 2018	Feb. 08, 2018	Mar. 31, 2019	Apr. 01, 2018
Business Acquisition [Line Items]
Severance, restructuring, and acquisition integration costs			$ 3,775,000	$ 20,394,000
Amortization of intangibles			$ 23,341,000	24,418,000
Net-Tech Technology, Inc.
Business Acquisition [Line Items]
Percentage of outstanding shares acquired	100.00%
Acquisition price paid	$ 8,500,000
Snell Advanced Media
Business Acquisition [Line Items]
Percentage of outstanding shares acquired		100.00%
Acquisition Price		$ 104,500,000
Acquisition price paid		75,200,000
Maximum earnout consideration		31,400,000
Estimated earnout consideration		29,300,000
Long-term debt acquired		19,315,000
Receivables		16,551,000
Tax basis in acquired goodwill		$ 0
Post acquisition revenue of acquiree				20,800,000
Post acquisition income (loss) before taxes of acquiree				(2,800,000)
Amortization of intangibles				2,200,000
Inventory adjustment				$ 500,000