Derivative Financial Instruments - Additional Information (Details) - USD ($) $ in Millions	3 Months Ended
	Dec. 31, 2016	Sep. 30, 2016
Canadian Dollar Forward Contract
Derivative [Line Items]
Foreign currency forward contract to hedge	$ 3.0
Foreign currency forward contract term	90 days
Canadian Subsidiary
Derivative [Line Items]
Denominated intercompany accounts payable	$ 27.3	$ 27.1
Denominated intercompany accounts payable, short-term nature	3.1
Denominated intercompany accounts payable, long-term nature	$ 24.2