Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended
Feb. 29, 2016	Feb. 28, 2015
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 1,690,834
Net income	13,127	$ 7,799
Dividends on common stock	(2,270)
Performance share-based stock issuance	0
Stock-based compensation	2,893
Stock repurchases	(87,526)
Ending balance	1,617,058
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	115,548
Ending balance	115,548
Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	682,871
Performance share-based stock issuance	(4,065)
Stock-based compensation	2,893
Ending balance	681,699
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	1,466,713
Net income	13,127
Dividends on common stock	(2,270)
Ending balance	1,477,570
Accumulated Other Comprehensive Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(17,319)
Ending balance	(17,319)
Trust for Benefit of Employees [Member]
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(109,936)
Performance share-based stock issuance	4,065
Ending balance	(105,871)
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(447,043)
Stock repurchases	(87,526)
Ending balance	$ (534,569)

This element represents the amount of recognized equity-based compensation during the period, that is, the amount recognized as expense in the income statement (or as asset if compensation is capitalized). Alternate captions include the words "stock-based compensation".

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Amount of paid and unpaid common stock dividends declared with the form of settlement in cash.

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The portion of profit or loss for the period, net of income taxes, which is attributable to the parent.

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Value of stock related to Restricted Stock Awards issued during the period, net of the stock value of such awards forfeited.

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Total of all stockholders' equity (deficit) items, net of receivables from officers, directors, owners, and affiliates of the entity which are attributable to the parent. The amount of the economic entity's stockholders' equity attributable to the parent excludes the amount of stockholders' equity which is allocable to that ownership interest in subsidiary equity which is not attributable to the parent (noncontrolling interest, minority interest). This excludes temporary equity and is sometimes called permanent equity.

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Equity impact of the cost of common and preferred stock that were repurchased during the period. Recorded using the cost method.

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