Concentrations of Credit Risk - Geographic Concentration Risk (Details)	12 Months Ended
	Sep. 30, 2014
Nevada [Member]
Net Receivables By Region	10.00%
Illinois [Member]
Net Receivables By Region	6.00%
Louisiana [Member]
Net Receivables By Region	6.00%
California [Member]
Net Receivables By Region	5.00%
Other North America [Member]
Net Receivables By Region	29.00%
North America [Member]
Net Receivables By Region	56.00%
Argentina [Member]
Net Receivables By Region	11.00%
Europe [Member]
Net Receivables By Region	8.00%
Mexico [Member]
Net Receivables By Region	8.00%
Australia [Member]
Net Receivables By Region	5.00%
Other International [Member]
Net Receivables By Region	12.00%
International [Member]
Net Receivables By Region	44.00%