Divestitures (Income (Loss) from Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended	6 Months Ended
May 31, 2013	May 31, 2012	May 31, 2013	May 31, 2012
Discontinued Operations and Disposal Groups [Abstract]
Revenue	$ 4,431	$ 40,468	$ 15,606	$ 82,423
Income (loss) before income taxes	(4,802)	(16,572)	(3,117)	(29,718)
Income tax provision (benefit)	(570)	(5,809)	(433)	(10,584)
Gain on sale, net of tax	0	0	19,757	0
Income (loss) from discontinued operations, net	$ (4,232)	$ (10,763)	$ 17,073	$ (19,134)

Amount of gain (loss), after tax expense or benefit and not previously recognized, resulting from the sale of a business component.

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Overall income (loss) from a disposal group that is classified as a component of the entity, before income tax, reported as a separate component of income before extraordinary items. Includes the following (before income tax): income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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- Definition

Tax effect allocated to a disposal group that is classified as a component of the entity reported as a separate component of income before extraordinary items. Includes the tax effects of the following: income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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

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Reference 7: http://www.xbrl.org/2003/role/presentationRef

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- Definition

Amount of income (loss) from a disposal group, net of income tax, reported as a separate component of income before extraordinary items after deduction or consideration of the amount allocable to noncontrolling interests. Includes, net of tax, income (loss) from operations during the phase-out period, gain (loss) on disposal, provision (or any reversals of earlier provisions) for loss on disposal, and adjustments of a prior period gain (loss) on disposal.

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