Acquisitions - Escrow (Details) - USD ($) $ in Millions		3 Months Ended
	Nov. 15, 2018	Mar. 31, 2019	Sep. 30, 2019	Apr. 20, 2018	Apr. 06, 2018	Oct. 05, 2017	Aug. 22, 2017	Jul. 05, 2017
GENEWIZ
Business Acquisition [Line Items]
Escrow deposit	$ 32.3
Escrow deposit for acquiree's employees retention obligations	1.5
Reversal of liability associated with adjustment holdback		$ 1.5
Seller's cash	$ 0.7
Escrow collected		$ 1.8
Tec-Sem Group AG
Business Acquisition [Line Items]
Escrow deposit					$ 2.6
Escrow deposit for acquiree's employees retention obligations					1.8
Escrow balance related to performance obligations					$ 0.8
Escrow deposit for indemnification obligation			$ 1.1
Escrow deposit for delivery of technology			0.3
4titude Limited
Business Acquisition [Line Items]
Escrow deposit			0.2			$ 0.4
Escrow deposit for acquiree's employees retention obligations			$ 0.2			$ 0.4
BioSpeciMan Corporation
Business Acquisition [Line Items]
Escrow deposit				$ 0.5
PBMMI and Novare
Business Acquisition [Line Items]
Escrow deposit								$ 3.3
Escrow deposit for indemnification obligation								2.9
Escrow deposit for payable to former owner								$ 0.4
RURO, Inc.
Business Acquisition [Line Items]
Escrow deposit							$ 0.5