Fair Value Disclosures (Fair Value Hierarchy, Carrying Values, and Estimated Fair Values of Financial Instruments) (Details) - Level 2 - Senior Notes [Member] - USD ($) $ in Thousands		Feb. 29, 2020	Nov. 30, 2019
Carrying Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes	[1]	$ 1,741,259	$ 1,740,858
Estimate of Fair Value [Member]
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items]
Senior notes		$ 1,936,250	$ 1,921,563

[1] The carrying values for the senior notes include unamortized debt issuance costs. Debt issuance costs are not factored into the estimated fair values of these notes.