Stockholders' Equity (Details 5) (2009 Stock Option Plan, USD $) In Thousands, except Share data, unless otherwise specified	12 Months Ended		12 Months Ended
	Dec. 03, 2011	Nov. 30, 2013	Nov. 30, 2013 $23.00-$28.00	Nov. 30, 2013 $28.00-$32.00	Nov. 30, 2013 $32.00-$35.00
Griffin Stock Option Plan
Exercise prices, low end of range (in dollars per share)			$ 23.00	$ 28.00	$ 32.00
Exercise prices, high end of range (in dollars per share)			$ 28.00	$ 32.00	$ 35.00
Outstanding at ending of the year (in shares)		239,677	21,276	127,826	90,575
Weighted Avg. Exercise Price (in dollars per share)		$ 30.35	$ 25.37	$ 28.96	$ 33.48
Weighted Avg. Remaining Contractual Life	6 years 1 month 6 days		6 years	6 years 10 months 24 days	4 years 10 months 24 days
Total Intrinsic Value		$ 681	$ 162	$ 517	$ 2