Fair Value Disclosures (Details 1) - USD ($) $ in Thousands		Nov. 30, 2017		Nov. 30, 2016		Jan. 29, 2013
Convertible senior notes due February 1, 2019 at 1.375%
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes, rate		1.375%				1.375%
Carrying Value | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value	[1]	$ 2,086,070		$ 2,345,843
Convertible Debt, Fair Value Disclosures		228,572	[2]	227,379	[1]
Estimate of Fair Value Measurement [Member] | Level 2
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Long-term Debt, Fair Value		2,292,250		2,494,844
Convertible Debt, Fair Value Disclosures		$ 278,300		$ 223,675

[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.

[2] (a)Amounts represent the aggregate fair value for real estate assets impacted by inventory impairment charges during the applicable period, as of the date that the fair value measurements were made. The carrying value for these real estate assets may have subsequently increased or decreased from the fair value reflected due to activity that has occurred since the measurement date.