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Summary of Significant Accounting Policies (Narrative) (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Nov. 30, 2017 | Nov. 30, 2016 | Nov. 30, 2015
Accounting Policies [Abstract] |  |  |
Cash equivalents | $ 481,100 | $ 396,100 |
Schedule of Equity Method Investments [Line Items] |  |  |
Impairment of Real Estate | 20,605 | 49,580 | $ 8,030
Property and equipment amount | 19,521 | 14,240 |
Accumulated depreciation | 19,000 | 18,200 |
Depreciation expense | 2,791 | 3,637 | 3,411
Advertising costs incurred | 34,400 | 32,700 | 33,400
Expensed legal fees | $ 14,000 | $ 13,600 | $ 11,700
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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- Definition Amount of accumulated depreciation, depletion and amortization for physical assets used in the normal conduct of business to produce goods and services. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.14) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition 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. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 720 -SubTopic 35 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6420018&loc=d3e36677-107848 + Details
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- Definition Amount of short-term, highly liquid investments that are both readily convertible to known amounts of cash and so near their maturity that they present insignificant risk of changes in value because of changes in interest rates. Excludes cash and cash equivalents within disposal group and discontinued operation. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.1) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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