Acquisitions and Divestitures - Narrative (Details) - USD ($)				3 Months Ended		9 Months Ended		12 Months Ended
	Sep. 03, 2019	Jul. 18, 2019	Jul. 23, 2018	Sep. 30, 2019	Sep. 30, 2018	Sep. 30, 2019	Sep. 30, 2018	Dec. 31, 2018
Business Acquisition [Line Items]
Net sales				$ 624,246,000	$ 622,888,000	$ 1,888,576,000	$ 1,869,572,000
Goodwill				1,774,390,000		1,774,390,000		$ 1,697,955,000
Velcora Holding AB
Business Acquisition [Line Items]
Net sales								$ 40,000,000
Aggregate purchase price, cash paid		$ 87,200,000
Assumed debt		51,100,000
Goodwill		97,352,000
Intangible assets		$ 47,501,000
Loss on extinguishment of debt	$ 700,000
Finger Lakes Instrumentation (FLI)
Business Acquisition [Line Items]
Aggregate purchase price, cash paid			$ 20,200,000
Goodwill			12,600,000
Intangible assets			7,900,000
Consideration transferred			23,600,000
Contingent consideration			$ 3,400,000
Contingent consideration arrangements, period			24 months
Selling, general and administrative expenses
Business Acquisition [Line Items]
Acquisition-related transaction costs				600,000	$ 0	1,300,000	$ 1,500,000
Cost of goods sold
Business Acquisition [Line Items]
Non-cash inventory set-up charge				$ 3,300,000		$ 3,300,000