Acquisitions (Details) - USD ($) $ in Thousands			3 Months Ended	6 Months Ended
	Jan. 01, 2021	Nov. 02, 2020	Mar. 31, 2021	Jun. 30, 2021	Dec. 31, 2020
Business Acquisition [Line Items]
Date of acquisition		Nov. 02, 2020
Outstanding common stock acquired (as a percent)		100.00%
Total purchase consideration			$ 30,600
Receivables			3,100
Inventory			4,300
Other assets			1,200
Intangibles			12,700
Goodwill			17,400	$ 105,631	$ 88,708
Accounts payable			3,600
Deferred tax liabilities			3,200
Other liabilities			1,300
Fair value of assets acquired				0
Cash payment			$ 29,700
Contingent payments				900
Customer relationships
Business Acquisition [Line Items]
Estimated average useful life			12 years
Analytical Technology, LLC
Business Acquisition [Line Items]
Date of acquisition	Jan. 01, 2021
Outstanding common stock acquired (as a percent)	100.00%
Total purchase consideration				44,000
Receivables				3,900
Inventory				3,900
Other assets				2,500
Intangibles				21,000
Goodwill				16,200
Accounts payable				1,200
Deferred tax liabilities				600
Other liabilities				1,700
Fair value of assets acquired				$ 0
Analytical Technology, LLC | Customer relationships | Minimum
Business Acquisition [Line Items]
Estimated average useful life				12 years
Analytical Technology, LLC | Customer relationships | Maximum
Business Acquisition [Line Items]
Estimated average useful life				15 years