Receivables, net - Additional Information (Details) - Credit Concentration Risk [Member]	12 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2014
Accounts, Notes, Loans and Financing Receivable [Line Items]
Percentage of net sales from major customer	15.20%	14.70%	15.70%
Sales Outside Domestic Country as Percentage of Net Sales	36.10%	37.70%	40.20%