Goodwill and Intangible Assets - Intangible Assets Subject to Amortization (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019
Finite-Lived Intangible Assets [Line Items]
Historical Cost	$ 1,613,922	$ 1,275,048
Accumulated Amortization	904,142	750,180
Net	$ 709,780	$ 524,868
Minimum
Finite-Lived Intangible Assets [Line Items]
Weighted-Average   Amortization Period	1 year
Maximum
Finite-Lived Intangible Assets [Line Items]
Weighted-Average   Amortization Period	20 years
Trade names
Finite-Lived Intangible Assets [Line Items]
Weighted-Average   Amortization Period	10 years	10 years 2 months 12 days
Historical Cost	$ 260,715	$ 193,202
Accumulated Amortization	100,273	82,552
Net	$ 160,442	$ 110,650
Patent and patent licenses
Finite-Lived Intangible Assets [Line Items]
Weighted-Average   Amortization Period	5 years 6 months	6 years 6 months
Historical Cost	$ 67,980	$ 67,921
Accumulated Amortization	66,964	63,143
Net	$ 1,016	$ 4,778
Customer relationships
Finite-Lived Intangible Assets [Line Items]
Weighted-Average   Amortization Period	8 years	8 years 6 months
Historical Cost	$ 848,875	$ 630,730
Accumulated Amortization	471,681	392,228
Net	$ 377,194	$ 238,502
Customer relationships | Minimum
Finite-Lived Intangible Assets [Line Items]
Weighted-Average   Amortization Period	4 years	4 years
Customer relationships | Maximum
Finite-Lived Intangible Assets [Line Items]
Weighted-Average   Amortization Period	5 years	5 years
Other purchased intangibles
Finite-Lived Intangible Assets [Line Items]
Weighted-Average   Amortization Period	4 years 3 months 18 days	4 years 3 months 18 days
Historical Cost	$ 436,352	$ 383,195
Accumulated Amortization	265,224	212,257
Net	$ 171,128	$ 170,938