Business and Credit Concentration (Details)	12 Months Ended
	Sep. 30, 2014 item	Sep. 30, 2013 item	Sep. 30, 2012 item
Net sales | One customer
Business and Credit Concentration
Number of customers	1	1	1
Net sales | Customer concentration risk | Customer A
Business and Credit Concentration
Percentage of concentration risk	11.00%	13.00%	14.00%
Net sales | Customer concentration risk | Customer A | Wholesale
Business and Credit Concentration
Percentage of concentration risk	19.00%	21.00%	23.00%
Gross accounts receivable | Customer concentration risk | Customer A | Wholesale
Business and Credit Concentration
Percentage of concentration risk	13.00%	12.00%
Gross accounts receivable | Customer concentration risk | Customer B | Wholesale
Business and Credit Concentration
Percentage of concentration risk	11.00%	11.00%