Consolidated Statements of Comprehensive Income (USD $) In Thousands, unless otherwise specified	12 Months Ended
Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012
Statement of Comprehensive Income [Abstract]
Net income	$ 67,379us-gaap_NetIncomeLoss	$ 45,292us-gaap_NetIncomeLoss	$ 54,578us-gaap_NetIncomeLoss
Other comprehensive income:
Foreign currency translation, net of tax benefit (expense) of ($8), $0 and $0, respectively	0	0	(13)
Amortization of interest rate swap, net of tax benefit of $424, $424 and $425, respectively	657	658	658
Comprehensive income	68,036us-gaap_ComprehensiveIncomeNetOfTax	45,950us-gaap_ComprehensiveIncomeNetOfTax	55,223us-gaap_ComprehensiveIncomeNetOfTax
Foreign currency translation, net of tax benefit (expense)	0	0	(8)
Amortization of interest rate swap, net of tax benefit	$ 424	$ 424	$ 424

Other Comprehensive Income, Amortization Adjustments on Derivatives, Included in Net Income, Net of Tax

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Other Comprehensive Income, Amortization Adjustments on Derivatives, Included in Net Income, Tax

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Amount after tax of increase (decrease) in equity from transactions and other events and circumstances from net income and other comprehensive income, attributable to parent entity. Excludes changes in equity resulting from investments by owners and distributions to owners.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Amount after tax and reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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Amount of tax expense (benefit), after reclassification adjustments of gain (loss) on foreign currency translation adjustments, foreign currency transactions designated and effective as economic hedges of a net investment in a foreign entity and intra-entity foreign currency transactions that are of a long-term-investment nature.

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