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Retirement Plan (Details) (USD $) In Millions, unless otherwise specified	12 Months Ended
	Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012
Compensation and Retirement Disclosure [Abstract]
Company contributions to the plan	$ 2.1us-gaap_DefinedBenefitPlanContributionsByEmployer	$ 1.9us-gaap_DefinedBenefitPlanContributionsByEmployer	$ 2.9us-gaap_DefinedBenefitPlanContributionsByEmployer

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- Details

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X

- Definition

The increase in the fair value of plan assets from contributions made by the employer.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 715

-SubTopic 20

-Section 50

-Paragraph 1

-Subparagraph (b)(3)

-URI http://asc.fasb.org/extlink&oid=35743120&loc=d3e1928-114920

+ Details

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