Divestitures (Income (Loss) from Discontinued Operations) (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
Feb. 28, 2013	Feb. 29, 2012
Discontinued Operations and Disposal Groups [Abstract]
Revenue	$ 5,639	$ 37,213
Income (loss) before income taxes	2,763	(7,328)
Income tax provision (benefit)	525	(2,867)
Gain on sale, net of tax	19,757	0
Income (loss) from discontinued operations, net	$ 21,995	$ (4,461)

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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- 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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