Stockholders' Equity (Details 5) (USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended
	Dec. 01, 2012	Dec. 03, 2011	Nov. 27, 2010
Other Disclosures
Total grant date fair value of options vested	$ 523	$ 269	$ 87
Nonvested Options
Activity under the Griffin Stock Option Plan
Outstanding at beginning of period (in shares)	190,443	103,881	101,377
Granted (in shares)	10,996	113,212	8,202
Vested (in shares)	(38,049)	(19,012)	(5,698)
Forfeited (in shares)		(7,638)
Outstanding at end of period (in shares)	163,390	190,443	103,881
Weighted Avg. Exercise Price
Outstanding at beginning of period (in dollars per share)	$ 30.56	$ 32.56	$ 32.84
Granted (in dollars per share)	$ 25.45	$ 28.68	$ 29.25
Vested (in dollars per share)	$ 32.19	$ 31.06	$ 32.84
Forfeited (in dollars per share)		$ 28.47
Outstanding at end of period (in dollars per share)	$ 29.84	$ 30.56	$ 32.56
Unrecognized compensation expense related to non-vested stock options that will be recognized during future periods
Fiscal 2013	403
Fiscal 2014	213
Fiscal 2015	90
Fiscal 2016	$ 12