Employee Benefit and Stock Plans (Details 1) (USD $)	12 Months Ended
Nov. 30, 2014	Nov. 30, 2013
$ 6.32 to $10.54
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	$ 6.32
Range of Exercise Price in dollars per share, Maximum	$ 11.05
Options Outstanding, Options	1,651,500
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 6.39
Options Outstanding, Weighted Average Remaining Contractual Life	6 years 10 months 31 days
Options Exercisable, Options	1,646,500
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 6.38
$10.55 to $14.96
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	$ 11.06
Range of Exercise Price in dollars per share, Maximum	$ 14.95
Options Outstanding, Options	3,150,622
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 13.03
Options Outstanding, Weighted Average Remaining Contractual Life	6 years 7 months 31 days
Options Exercisable, Options	1,876,975
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 11.95
$14.97 to $20.08
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	$ 14.96
Range of Exercise Price in dollars per share, Maximum	$ 19.90
Options Outstanding, Options	2,684,134
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 17.29
Options Outstanding, Weighted Average Remaining Contractual Life	5 years 3 months 1 day
Options Exercisable, Options	2,331,478
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 17.40
$20.09 to $33.92
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	$ 19.91
Range of Exercise Price in dollars per share, Maximum	$ 33.92
Options Outstanding, Options	2,120,746
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 27.01
Options Outstanding, Weighted Average Remaining Contractual Life	3 years 1 month 1 day
Options Exercisable, Options	2,120,746
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 27.01
$33.93 to $69.63
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	$ 33.93
Range of Exercise Price in dollars per share, Maximum	$ 69.63
Options Outstanding, Options	2,128,040
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 39.80
Options Outstanding, Weighted Average Remaining Contractual Life	3 years 4 months 31 days
Options Exercisable, Options	2,128,040
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 39.80
$ 6.32 to $69.63
Stock options outstanding and stock options exercisable
Range of Exercise Price in dollars per share, Minimum	$ 6.32
Range of Exercise Price in dollars per share, Maximum	$ 69.63
Options Outstanding, Options	11,735,042.000
Options Outstanding, Weighted Average Exercise Price in dollars per share	$ 20.45
Options Outstanding, Weighted Average Remaining Contractual Life	5 years 1 month 1 day
Options Exercisable, Options	10,103,739.000
Options Exercisable, Weighted Average Exercise Price in dollars per share	$ 21.32
Options Exercisable, Weighted Average Remaining Contractual Life		4 years 5 months 1 day

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Weighted average exercise price as of the balance sheet date for those equity-based payment arrangements exercisable and outstanding.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(iii)

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- Definition

Weighted average remaining contractual term of exercisable stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)(2)

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- Definition

The floor of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

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The number of shares reserved for issuance pertaining to the outstanding exercisable stock options as of the balance sheet date in the customized range of exercise prices for which the market and performance vesting condition has been satisfied.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(iii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The number of shares reserved for issuance pertaining to the outstanding stock options as of the balance sheet date for all option plans in the customized range of exercise prices.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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- Definition

The weighted average price as of the balance sheet date at which grantees could acquire the underlying shares with respect to all outstanding stock options which are in the customized range of exercise prices.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (c)(1)(i)-(ii)

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- Definition

Weighted average remaining contractual term of outstanding stock options, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (e)(1)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5070-113901

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The ceiling of a customized range of exercise prices for purposes of disclosing shares potentially issuable under outstanding stock option awards on all stock option plans and other required information pertaining to awards in the customized range.

+ References

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (g)

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