Stockholders Equity (Details 2) (USD $)	9 Months Ended
	Sep. 01, 2012	Aug. 27, 2011
Stock options
Griffin Stock Option Plan
Expiration term (in years)	10 years
Assumptions used in determining the fair value of the stock options granted
Expected volatility (as a percent)	41.10%
Risk free interest rate (as a percent)	1.16%
Expected option term	8 years 6 months
Annual dividend yield (as a percent)		1.40%
Activity under the Griffin Stock Option Plan
Granted (in shares)	6,748	113,212
Stock options | Minimum
Assumptions used in determining the fair value of the stock options granted
Expected volatility (as a percent)		42.00%
Risk free interest rate (as a percent)		2.06%
Expected option term		5 years
Stock options | Maximum
Assumptions used in determining the fair value of the stock options granted
Expected volatility (as a percent)		43.40%
Risk free interest rate (as a percent)		2.81%
Expected option term		8 years 6 months
Stock options | Non-employee directors
Griffin Stock Option Plan
Fair values of stock options granted (in dollars per share)	11.32	12.03
Activity under the Griffin Stock Option Plan
Granted (in shares)	6,748	8,712
Stock options | Employees
Activity under the Griffin Stock Option Plan
Granted (in shares)		104,500
Stock options | Employees | Minimum
Griffin Stock Option Plan
Fair values of stock options granted (in dollars per share)		10.37
Stock options | Employees | Maximum
Griffin Stock Option Plan
Fair values of stock options granted (in dollars per share)		12.88
Vested Options
Activity under the Griffin Stock Option Plan
Outstanding at beginning of period (in shares)	54,075	45,730
Exercised (in shares)	(5,322)	(10,667)
Vested (in shares)	33,801	19,012
Forfeited (in shares)	(1,419)
Outstanding at end of period (in shares)	81,135	54,075
Weighted Avg. Exercise Price
Outstanding at beginning of period (in dollars per share)	27.08	23.18
Exercised (in dollars per share)	15.03	17.45
Vested (in dollars per share)	32.69	31.06
Forfeited (in dollars per share)	28.18
Outstanding at end of period (in dollars per share)	30.19	27.08
Nonvested Options
Activity under the Griffin Stock Option Plan
Outstanding at beginning of period (in shares)	190,443	103,881
Granted (in shares)	6,748	113,212
Vested (in shares)	(33,801)	(19,012)
Outstanding at end of period (in shares)	163,390	198,081
Weighted Avg. Exercise Price
Outstanding at beginning of period (in dollars per share)	30.56	32.56
Granted (in dollars per share)	23.70	28.68
Vested (in dollars per share)	32.69	31.06
Outstanding at end of period (in dollars per share)	29.84	30.48