Note 3 - Accounting for Share-based Compensation - Stock Option Activity (Details) - $ / shares	12 Months Ended
	Dec. 03, 2016	Nov. 28, 2015	Nov. 29, 2014
Outstanding Options (in shares)	2,912,073	2,534,473	2,429,961
Outstanding Options (in dollars per share)	$ 33.37	$ 30.39	$ 25.74
Granted (in shares)	853,516	759,167	477,606
Granted (in dollars per share)	$ 33.98	$ 40.69	$ 48.06
Exercised (in shares)	(593,891)	(275,035)	(330,179)
Exercised (in dollars per share)	$ 24.38	$ 22.67	$ 20.75
Forfeited or cancelled (in shares)	(185,217)	(106,532)	(42,915)
Forfeited or cancelled (in dollars per share)	$ 39.91	$ 42.42	$ 38.59
Outstanding Options (in shares)	2,986,481	2,912,073	2,534,473
Outstanding Options (in dollars per share)	$ 34.92	$ 33.37	$ 30.39