Acquisitions - General Information (Details) - USD ($) $ in Millions	3 Months Ended		9 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016	Nov. 28, 2016	Sep. 30, 2016	Nov. 30, 2015
Business Acquisition [Line Items]
Amortization of acquired intangible assets	$ 4.3	$ 3.8	$ 12.7	$ 11.1
Acquisition related costs			0.2	3.2
Cool Lab, LLC
Business Acquisition [Line Items]
Liabilities arising from contingencies, amount recognized	0.7		0.7		$ 0.7
Actual revenues	1.1		2.5
Actual net income (loss)			(0.3)
Inventory step up	0.1		0.4
Amortization of acquired intangible assets	0.4		0.8
BioStorage Technologies, Inc.
Business Acquisition [Line Items]
Actual revenues	15.3	12.4	46.0	30.3
Actual net income (loss)	2.4	1.1	6.0	0.3
Amortization of acquired intangible assets	1.1	0.9	3.4	2.0
Escrow deposit for acquiree's employees retention obligations	0.0		0.0			$ 0.1	$ 2.5
Compensation expense	0.0	0.3	0.1	$ 0.7
Selling, General and Administrative Expenses | Cool Lab, LLC
Business Acquisition [Line Items]
Acquisition related costs	0.1		$ 0.4
Selling, General and Administrative Expenses | BioStorage Technologies, Inc.
Business Acquisition [Line Items]
Acquisition related costs	0.1	$ 0.1
Prepaid Expenses and Other Current Assets
Business Acquisition [Line Items]
Escrow deposit for acquiree's employees retention obligations							$ 2.5
Maximum | Cool Lab, LLC
Business Acquisition [Line Items]
Actual net income (loss)	$ (0.1)