The period of time, from the grant date until the time at which the share-based award expires.

No definition available.

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- Definition

Represents the forfeiture rates that is used in valuing an option on own shares.

+ References

No definition available.

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- Definition

Represents the number of shares authorized from the prior share-based plans of the entity.

+ References

No definition available.

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- Definition

The number of option holders as at the end of the reporting period.

+ References

No definition available.

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- Definition

Represents the expense recognized during the period arising from equity-based compensation arrangements (for example, shares of stock, unit, stock options or other equity instruments) with employees, directors and certain consultants qualifying for treatment as employees.

+ 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 (h)(1)(i)

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

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph g(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 1

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=6415400&loc=d3e5047-113901

Reference 4: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section F

Reference 5: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph 64

-Subparagraph b

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

Reference 6: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.F)

-URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809

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- Definition

The total recognized tax benefit related to compensation cost for equity-based payment arrangements recognized in income during the period.

+ References

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- Definition

The estimated dividend rate (a percentage of the share price) to be paid (expected dividends) to holders of the underlying shares over the option's term.

+ References

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- Definition

Expected term of share-based compensation awards, 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 S99

-Paragraph 1

-Subparagraph (SAB TOPIC 14.D.2)

-URI http://asc.fasb.org/extlink&oid=6793087&loc=d3e301413-122809

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-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

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

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Staff Accounting Bulletin (SAB)

-Number Topic 14

-Section D

-Subsection 2

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- Definition

The estimated measure of the percentage by which a share price is expected to fluctuate during a period. Volatility also may be defined as a probability-weighted measure of the dispersion of returns about the mean. The volatility of a share price is the standard deviation of the continuously compounded rates of return on the share over a specified period. That is the same as the standard deviation of the differences in the natural logarithms of the stock prices plus dividends, if any, over the period.

+ References

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- Definition

The risk-free interest rate assumption that is used in valuing an option on its own shares.

+ References

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- Definition

The maximum number of shares (or other type of equity) originally approved (usually by shareholders and board of directors), net of any subsequent amendments and adjustments, for awards under the equity-based compensation plan. As stock or unit options and equity instruments other than options are awarded to participants, the shares or units remain authorized and become reserved for issuance under outstanding awards (not necessarily vested).

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph a

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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

-Publisher FASB

-Name Accounting Standards Codification

-Topic 718

-SubTopic 10

-Section 50

-Paragraph 2

-Subparagraph (a)(3)

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

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- Definition

Gross number of share options (or share units) granted during the period.

+ References

No definition available.

+ Details

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- Definition

The weighted average grant-date fair value of options granted during the reporting period as calculated by applying the disclosed option pricing methodology.

+ References

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

-Publisher FASB

-Name Statement of Financial Accounting Standard (FAS)

-Number 123R

-Paragraph A240

-Subparagraph c(1)

-LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy.

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-Publisher FASB

-Name Accounting Standards Codification

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Stockholders' Equity (Details 2) (Stock options, USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 01, 2012	Dec. 03, 2011	Nov. 27, 2010	Nov. 28, 2009
Other Disclosures
Number of option holders	18
2009 Stock Option Plan
Griffin Stock Option Plan
Number of shares authorized				386,926
Number of shares available for issuance under prior plans included in total shares authorized				161,926
Expiration term	10 years
Granted (in shares)	10,996	113,212	8,202
Assumptions used in determining the fair value of the stock options granted
Expected volatility (as a percent)			42.30%
Range of risk free interest rate (as a percent)			3.00%
Expected option term	8 years 6 months		8 years 6 months
Annual dividend yield (as a percent)		1.40%	1.40%
Compensation expense	$ 604	$ 564	$ 392
Related tax benefit	$ 148	$ 138	$ 99
Other Disclosures
Forfeiture rates (as a percent)	0.00%	22.60%	41.10%
2009 Stock Option Plan \| Minimum
Assumptions used in determining the fair value of the stock options granted
Expected volatility (as a percent)	39.60%	42.00%
Range of risk free interest rate (as a percent)	1.02%	2.06%
Expected option term		5 years
Annual dividend yield (as a percent)	0.00%
2009 Stock Option Plan \| Maximum
Assumptions used in determining the fair value of the stock options granted
Expected volatility (as a percent)	41.10%	43.40%
Range of risk free interest rate (as a percent)	1.19%	2.81%
Expected option term		8 years 6 months
Annual dividend yield (as a percent)	0.70%
2009 Stock Option Plan \| Non-employee directors
Griffin Stock Option Plan
Fair values of stock options granted (in dollars per share)		$ 12.03	$ 13.48
Granted (in shares)	10,996	8,712	8,202
2009 Stock Option Plan \| Non-employee directors \| Minimum
Griffin Stock Option Plan
Fair values of stock options granted (in dollars per share)	$ 10.66
2009 Stock Option Plan \| Non-employee directors \| Maximum
Griffin Stock Option Plan
Fair values of stock options granted (in dollars per share)	$ 14.89
2009 Stock Option Plan \| Employees
Griffin Stock Option Plan
Granted (in shares)		104,500
2009 Stock Option Plan \| Employees \| Minimum
Griffin Stock Option Plan
Fair values of stock options granted (in dollars per share)		$ 10.37
2009 Stock Option Plan \| Employees \| Maximum
Griffin Stock Option Plan
Fair values of stock options granted (in dollars per share)		$ 12.88