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Stockholders' Equity (Details) (USD $) In Thousands, unless otherwise specified	3 Months Ended
	Feb. 28, 2013	Feb. 29, 2012	Nov. 30, 2012	Nov. 30, 2011
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	$ 473,135	$ 393,868	$ 376,806	$ 442,657
Net loss	(12,458)	(45,802)
Dividends on common stock	(2,089)	(4,818)
Restricted stock amortization	620	409
Stock-based compensation	393	1,247
Grantor stock ownership trust	52	175
Ending balance	473,135	393,868	376,806	442,657
Common Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	115,178	115,171	115,178	115,171
Ending balance	115,178	115,171	115,178	115,171
Paid-in Capital
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	783,298	885,765	888,579	884,190
Restricted stock amortization	620	409
Stock-based compensation	393	1,247
Issuance of common stock	(106,314)
Grantor stock ownership trust	20	(81)
Ending balance	783,298	885,765	888,579	884,190
Retained Earnings
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	435,745	469,224	450,292	519,844
Net loss	(12,458)	(45,802)
Dividends on common stock	(2,089)	(4,818)
Ending balance	435,745	469,224	450,292	519,844
Accumulated Other Comprehensive Income
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(27,958)	(26,152)	(27,958)	(26,152)
Ending balance	(27,958)	(26,152)	(27,958)	(26,152)
Grantor Stock Ownership Trust
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(115,117)	(117,803)	(115,149)	(118,059)
Grantor stock ownership trust	32	256
Ending balance	(115,117)	(117,803)	(115,149)	(118,059)
Treasury Stock
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Beginning balance	(718,011)	(932,337)	(934,136)	(932,337)
Issuance of common stock	216,125
Ending balance	$ (718,011)	$ (932,337)	$ (934,136)	$ (932,337)

X

- Definition

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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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 20

-Section 55

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Amount of equity-based compensation, related to restricted stock units or restricted stock awards, recognized as expense or an asset, if compensation is capitalized.

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Equity impact of common stock cash dividends declared by an entity during the period. This element includes paid and unpaid dividends declared during the period.

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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

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- Definition

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

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-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

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-Publisher AICPA

-Name Accounting Research Bulletin (ARB)

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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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Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

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Aggregate change in value for stock issued during the period as a result of employee stock purchase plan.

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