Derivative Financial Instruments - Additional Information (Details) - USD ($)	3 Months Ended
	Dec. 31, 2015	Sep. 30, 2015
Canadian Dollar Forward Contract
Derivative [Line Items]
Foreign currency forward contract to hedge	$ 2,000,000
Foreign currency forward contract term	90 days
Accrued unrealized foreign exchange loss	$ 8,000
Canadian Subsidiary
Derivative [Line Items]
Denominated intercompany accounts payable	28,300,000	$ 28,100,000
Denominated intercompany accounts payable, short-term nature	2,100,000
Denominated intercompany accounts payable, long-term nature	$ 26,200,000