Acquisitions - Transaction Costs (Details) - USD ($) $ in Millions	12 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2016
Tec-Sem Group AG
Business Acquisition [Line Items]
Acquisition related costs	$ 0.9
4titude Limited
Business Acquisition [Line Items]
Acquisition related costs	1.1
PBMMI and Novare
Business Acquisition [Line Items]
Acquisition related costs		$ 0.3
PBMMI and Novare | Maximum
Business Acquisition [Line Items]
Acquisition related costs	0.1
Cool Lab, LLC
Business Acquisition [Line Items]
Acquisition related costs		0.4
BioStorage Technologies, Inc.
Business Acquisition [Line Items]
Acquisition related costs	$ 0.3	0.3	$ 3.2
BioStorage Technologies, Inc. | Selling, General and Administrative Expenses
Business Acquisition [Line Items]
Acquisition related costs		$ 3.2