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Fair Value Disclosures (Carrying Values and Estimated Fair Values of Financial Instruments) (Details) - Level 2 - USD ($) $ in Thousands | Nov. 30, 2018 | Nov. 30, 2017
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Senior Notes [Member] | Carrying Value |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Senior notes | [1] | $ 1,790,437 | $ 2,086,070
Senior Notes [Member] | Estimated Fair Value |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Senior notes |  | 1,853,438 | 2,292,250
Convertible Notes Payable [Member] | Carrying Value |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Convertible senior notes | [1] | 229,788 | 228,572
Convertible Notes Payable [Member] | Estimated Fair Value |  |  |
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |
Convertible senior notes |  | $ 229,425 | $ 278,300
[1] | The carrying values for the senior notes and convertible senior notes, as presented, include unamortized debt issuance costs. Debt issuance costs are not factored into the estimated fair values of these notes.

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- Definition Fair value portion of borrowing which can be exchanged for a specified number of another security at the option of the issuer or the holder, for example, but not limited to, the entity's common stock. + References No definition available. + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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- Definition The fair value amount of long-term debt whether such amount is presented as a separate caption or as a parenthetical disclosure. Additionally, this element may be used in connection with the fair value disclosures required in the footnote disclosures to the financial statements. The element may be used in both the balance sheet and disclosure in the same submission. + References No definition available. + Details
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- Details
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