Aggregate number of common shares reserved for future issuance.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.29)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

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- Definition

Aggregate dividends paid during the period for each share of common stock outstanding.

+ References

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

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 04

-Article 3

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.3-04)

-URI http://asc.fasb.org/extlink&oid=27012166&loc=d3e187085-122770

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- Definition

The number of shares authorized to be repurchased by an entity's Board of Directors under a stock repurchase plan.

+ References

No definition available.

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- Definition

The amount allocated to treasury stock. Treasury stock is common and preferred shares of an entity that were issued, repurchased by the entity, and are held in its treasury.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 505

-SubTopic 30

-Section 50

-Paragraph 4

-URI http://asc.fasb.org/extlink&oid=6405834&loc=d3e23315-112656

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Stockholders' Equity (Narratives) (Details) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended
	Feb. 28, 2015	Feb. 28, 2014	Nov. 30, 2014	Jul. 17, 2014
Equity [Abstract]
Dividend paid in each quarter (in dollars per share)	$ 0.0250	$ 0.0250
Debt Instrument [Line Items]
Number of common stock, authorized, approved under a board approved stock repurchase program	4,000,000
Common stock reserve, shares	12,602,735
Treasury Stock, Value	$ 446,497us-gaap_TreasuryStockValue		$ 446,476us-gaap_TreasuryStockValue
Director Stock Units [Domain]
Debt Instrument [Line Items]
Number of common stock, authorized, approved under a board approved stock repurchase program				680,000