Intangible Assets - Additional Information (Details)	12 Months Ended
	Dec. 31, 2020 USD ($) Reporting_Unit	Dec. 31, 2019 USD ($)	Dec. 31, 2018 USD ($)
Finite And Indefinite Intangible Assets [Line Items]
Number of reporting units used in quantitative assessment | Reporting_Unit	10
Goodwill impairment loss	$ 0	$ 0	$ 0
Impairment of indefinite lived intangible assets	0	0	0
Amortization expense in income from continuing operations	66,200,000	74,600,000	75,100,000
Amortization of intangibles	64,395,000	74,609,000	75,140,000
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Estimated amortization expense in 2020	35,600,000
Estimated amortization expense in 2021	32,900,000
Estimated amortization expense in 2022	31,200,000
Estimated amortization expense in 2023	29,000,000.0
Estimated amortization expense in 2024	24,700,000
Finite-Lived Intangible Assets, Accumulated Amortization	(556,379,000)	(490,736,000)
Trademark, net carrying amount	$ 256,008,000	298,599,000
Customer relationships
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Weighted-average amortization period	18 years 2 months 12 days
Finite-Lived Intangible Assets, Accumulated Amortization	$ (128,796,000)	(110,732,000)
Trademark, net carrying amount	166,586,000	186,863,000
Trademarks
Finite And Indefinite Intangible Assets [Line Items]
Impairment of indefinite lived intangible assets	$ 0	0	0
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Weighted-average amortization period	8 years 3 months 18 days
Finite-Lived Intangible Assets, Accumulated Amortization	$ (36,539,000)	(30,213,000)
Trademark, net carrying amount	29,322,000	26,180,000
Trademarks | Intangible Assets, Amortization Period
Finite And Indefinite Intangible Assets [Line Items]
Amortization of intangibles	1,800,000
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Trademark, net carrying amount	$ 7,800,000
Developed technologies
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Weighted-average amortization period	6 years 9 months 18 days
Finite-Lived Intangible Assets, Accumulated Amortization	$ (369,849,000)	(331,696,000)
Trademark, net carrying amount	$ 58,338,000	81,614,000
In-process research and development
Finite-Lived Intangible Assets, Net, Amortization Expense, Fiscal Year Maturity [Abstract]
Weighted-average amortization period	5 years
Finite-Lived Intangible Assets, Accumulated Amortization	$ (9,774,000)	(7,160,000)
Trademark, net carrying amount	1,762,000	3,542,000
Grass Valley
Finite And Indefinite Intangible Assets [Line Items]
Impairment of the disposal group	113,000,000.0	521,400,000
Discontinued Operations, Held-for-sale
Finite And Indefinite Intangible Assets [Line Items]
Impairment of the disposal group		179,300,000
Translation exchange rates		180,400,000
Discontinued Operations, Held-for-sale | Customer relationships
Finite And Indefinite Intangible Assets [Line Items]
Impairment of intangible assets		14,400,000
Discontinued Operations, Held-for-sale | Trademarks
Finite And Indefinite Intangible Assets [Line Items]
Impairment of intangible assets		1,600,000
Discontinued Operations, Held-for-sale | Grass Valley
Finite And Indefinite Intangible Assets [Line Items]
Impairment of the disposal group	113,007,000	521,441,000	$ 0
Goodwill impairment loss		$ 326,100,000
Impairment of the disposal group	179,300,000
Translation exchange rates	180,400,000
Discontinued Operations, Held-for-sale | Grass Valley | Customer relationships
Finite And Indefinite Intangible Assets [Line Items]
Impairment of intangible assets	14,400,000
Discontinued Operations, Held-for-sale | Grass Valley | Trademarks
Finite And Indefinite Intangible Assets [Line Items]
Impairment of intangible assets	$ 1,600,000