Acquisitions and Divestitures - Allocation of Acquisition Costs to Assets Acquired and Liabilities Assumed (Details) - USD ($) $ in Thousands	Dec. 31, 2020	Feb. 28, 2020	Dec. 31, 2019	Jul. 18, 2019	Dec. 31, 2018
Business Acquisition [Line Items]
Goodwill	$ 1,895,574		$ 1,779,745		$ 1,697,955
Flow MD
Business Acquisition [Line Items]
Current assets, net of cash acquired		$ 32,858
Property, plant and equipment		4,166
Goodwill		60,431
Intangible assets		53,000
Other noncurrent assets		1,344
Total assets acquired		151,799
Current liabilities		(32,291)
Deferred income taxes		2,054
Other noncurrent liabilities		(329)
Net assets acquired		$ 121,233
Velcora Holding AB
Business Acquisition [Line Items]
Current assets, net of cash acquired				$ 20,248
Property, plant and equipment				1,656
Goodwill				86,613
Intangible assets				48,183
Other noncurrent assets				788
Total assets acquired				157,488
Current liabilities				(7,630)
Long-term borrowings				(51,130)
Deferred income taxes				(11,094)
Other noncurrent liabilities				(454)
Net assets acquired				$ 87,180