Business Segments (Details)	12 Months Ended
Sep. 30, 2014	Sep. 30, 2013	Sep. 30, 2012
Business Segments
Number of Operating Segments	2
North America [Member]
Percentage of Consolidated Revenues [Line Items]
Percentage of Consolidated Revenues	79.00%	78.00%	76.00%
International [Member]
Percentage of Consolidated Revenues [Line Items]
Percentage of Consolidated Revenues	21.00%	22.00%	24.00%

Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues.

No definition available.

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Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration