Summary of Significant Accounting Policies (Narrative) (Details) (USD $)	12 Months Ended
Nov. 30, 2014	Nov. 30, 2013	Nov. 30, 2012
Accounting Policies [Abstract]
Cash equivalents	$ 197,700,000us-gaap_CashEquivalentsAtCarryingValue	$ 436,200,000us-gaap_CashEquivalentsAtCarryingValue
Restricted Cash and Cash Equivalents	27,235,000	41,906,000
Schedule of Equity Method Investments [Line Items]
Property and equipment amount	11,831,000us-gaap_PropertyPlantAndEquipmentNet	8,460,000us-gaap_PropertyPlantAndEquipmentNet
Accumulated depreciation	15,000,000	14,400,000
Depreciation expense	2,420,000us-gaap_DepreciationAndAmortization	1,857,000us-gaap_DepreciationAndAmortization	1,622,000us-gaap_DepreciationAndAmortization
Advertising costs incurred	30,200,000us-gaap_AdvertisingExpense	25,300,000us-gaap_AdvertisingExpense	24,600,000us-gaap_AdvertisingExpense
Expensed legal fees	$ 10,900,000us-gaap_LegalFees	$ 10,100,000us-gaap_LegalFees	$ 12,600,000us-gaap_LegalFees
Minimum
Schedule of Equity Method Investments [Line Items]
Estimated useful life for depreciation of property and equipment	2 years
Maximum
Schedule of Equity Method Investments [Line Items]
Estimated useful life for depreciation of property and equipment	10 years

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Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services.

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Amount charged to advertising expense for the period, which are expenses incurred with the objective of increasing revenue for a specified brand, product or product line.

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