Summary of Significant Accounting Policies - Additional Information (Details)			1 Months Ended		3 Months Ended		12 Months Ended
	Jan. 01, 2018 USD ($)	Jul. 05, 2011 patent	Nov. 30, 2016 USD ($)	Jul. 31, 2015 patent	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) Customer	Dec. 31, 2017 USD ($)	Dec. 31, 2017 USD ($) Segment	Dec. 31, 2017 USD ($) Reporting_Unit	Dec. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)	Dec. 31, 2016 USD ($) Customer	Dec. 31, 2015 USD ($)
Significant Accounting Policies [Line Items]
Amount of inventory as a percentage of prior year purchases that can be returned by certain distributors											3.00%
Unprocessed adjustments recognized against gross accounts receivables										$ 35,700,000		$ 23,300,000
Bad debt expense, net of recoveries										0		$ 1,500,000	$ (1,800,000)
Accounts receivable recovered													2,700,000
Number of customers with accounts receivable recovered | Customer						1						1
Allowance for doubtful accounts					$ 7,800,000	$ 8,100,000	$ 7,800,000	$ 7,800,000	$ 7,800,000	7,800,000	$ 7,800,000	$ 8,100,000
Obsolescence and other reserves					25,269,000	24,561,000	25,269,000	25,269,000	$ 25,269,000	25,269,000	25,269,000	24,561,000
Number of reporting units used in qualitative assessment | Reporting_Unit									7
Goodwill qualitative assessment					547,200,000		547,200,000	547,200,000	$ 547,200,000	547,200,000	547,200,000
Goodwill, portion related to reporting units					931,100,000		931,100,000	$ 931,100,000	$ 931,100,000	931,100,000	931,100,000
Number of reportable segments								4	5
Accrued rebates					38,025,000	33,071,000	$ 38,025,000	$ 38,025,000	$ 38,025,000	38,025,000	$ 38,025,000	33,071,000
Royalty revenues						10,300,000
Advertising costs										25,000,000		27,200,000	27,500,000
Tax Cuts and Jobs Act of 2017, transition tax for accumulated foreign earnings, income tax expense					29,100,000					29,100,000
Tax Cuts and Jobs Act of 2017, remeasurement of deferred tax assets and liabilities					36,000,000					36,000,000
Tax Cuts and Jobs Act of 2017, valuation allowance against foreign tax credit carryforward					$ (35,300,000)					(35,300,000)
Goodwill impairment										0		0	0
Indefinite lived intangible asset impairment										0		0	0
Amortizable intangible asset impairment										0		0	0
Reportable Segment [Member]
Significant Accounting Policies [Line Items]
Royalty revenues										0		5,554,000	0
Broadcast Solutions [Member] | Reportable Segment [Member]
Significant Accounting Policies [Line Items]
Royalty revenues										0		5,554,000	$ 0
Subsidiaries [Member] | Corning [Member]
Significant Accounting Policies [Line Items]
Patents allegedly infringed upon | patent		2
Litigation settlement, amount			$ 61,300,000
Royalty revenues												10,300,000
Number of patents found infringed upon | patent				2
Subsidiaries [Member] | Corning [Member] | Reportable Segment [Member]
Significant Accounting Policies [Line Items]
Royalty revenues												5,600,000
Subsidiaries [Member] | Corning [Member] | Broadcast Solutions [Member]
Significant Accounting Policies [Line Items]
Royalty revenues												4,700,000
Hirschmann Jv [Member] | Discontinued Operations, Held-for-sale [Member]
Significant Accounting Policies [Line Items]
Equity method investment, realized Loss on disposal										$ 1,000,000
Equity method investments						$ 26,800,000						$ 26,800,000
Hirschmann Jv [Member]
Significant Accounting Policies [Line Items]
Equity method investment, ownership percentage					50.00%		50.00%	50.00%	50.00%	50.00%	50.00%
Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of related assets							1 year
Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of related assets							25 years
Buildings [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of related assets							P10Y
Buildings [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of related assets							P40Y
Machinery and Equipment [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of related assets							P5Y
Machinery and Equipment [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of related assets							P12Y
Computer Equipment and Software [Member] | Minimum [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of related assets							P5Y
Computer Equipment and Software [Member] | Maximum [Member]
Significant Accounting Policies [Line Items]
Estimated useful life of related assets							P10Y
Scenario, Forecast [Member] | Accounting Standards Update 2014-09 [Member]
Significant Accounting Policies [Line Items]
Cumulative effect on retained earnings expected in next year	$ 2,600,000