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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($)
$ in Thousands
 12 Months Ended
Nov. 30, 2016
Nov. 30, 2015
Nov. 30, 2014
Accounting Policies [Abstract]      
Cash equivalents $ 396,100 $ 342,300  
Restricted Cash and Cash Equivalents 0 9,344  
Schedule of Equity Method Investments [Line Items]      
Debt Issuance Costs, Net 18,300 23,800  
Impairment of Real Estate 49,580 8,030 $ 37,628
Property and equipment amount 14,240 13,100  
Accumulated depreciation 18,200 15,300  
Depreciation expense 3,637 3,411 2,420
Advertising costs incurred 32,700 33,400 30,200
Expensed legal fees $ 13,600 11,700 $ 10,900
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    
Land [Member]      
Schedule of Equity Method Investments [Line Items]      
Impairment of Real Estate   $ 26,600