Stockholders' Equity (Details 5) (USD $) In Thousands, except Share data, unless otherwise specified	3 Months Ended	9 Months Ended
Aug. 31, 2013	Sep. 01, 2012	Aug. 31, 2013	Sep. 01, 2012
Compensation expense for stock options
Compensation expense	$ 91	$ 124	$ 358	$ 428
Related tax benefit	29	32	86	98
Unrecognized compensation expense related to non-vested stock options that will be recognized during future periods
Balance of Fiscal 2013	107		107
Fiscal 2014	262		262
Fiscal 2015	111		111
Fiscal 2016	$ 12		$ 12
Nonvested Options
Activity under the Griffin Stock Option Plan
Outstanding at beginning of period (in shares)			163,390	190,443
Granted (in shares)			8,112	6,748
Vested (in shares)			(34,143)	(33,801)
Forfeited (in shares)			(2,833)
Outstanding at end of period (in shares)	134,526	163,390	134,526	163,390
Weighted Avg. Exercise Price
Outstanding at beginning of period (in dollars per share)			$ 29.84	$ 30.56
Granted (in dollars per share)			$ 29.58	$ 23.70
Vested (in dollars per share)			$ 32.36	$ 32.69
Forfeited (in dollars per share)			$ 30.03
Outstanding at end of period (in dollars per share)	$ 29.18	$ 29.84	$ 29.18	$ 29.84

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Amount of unrecognized compensation expense related to non-vested stock options that will be recognized in the second fiscal year following the latest fiscal year.

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Weighted average price at which grantees can acquire the shares reserved for issuance under the stock option plan.

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