Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration

Basis of Presentation (Narrative) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended	9 Months Ended	1 Months Ended	9 Months Ended
	Aug. 31, 2012 Segments	Feb. 28, 2013 product_lines	Aug. 31, 2013 Segments	Jul. 31, 2013 Apama [Member]	Aug. 31, 2013 Apama [Member]
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items]
Number of product lines divested		10
Number of reportable segments	2		1
Sale of Apama product line, sales price				$ 44,268	$ 44,268