Goodwill and Intangible Assets Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2016	Dec. 31, 2015
Goodwill [Line Items]
Amortization expense for intangible assets	$ 4.1	$ 3.5
Cool Lab, LLC
Goodwill [Line Items]
Goodwill acquired during period	8.4
Amortization expense for intangible assets	$ 0.1