Note 9 - Stockholders' Equity (Details Textual) - USD ($) $ / shares in Units, $ in Thousands	12 Months Ended
	Dec. 03, 2016	Nov. 28, 2015	Nov. 29, 2014	Nov. 30, 2013	Sep. 30, 2010
Preferred Stock, Shares Authorized	10,045,900	10,045,900
Common Stock, Shares Authorized	160,000,000	160,000,000
Common Stock, Par or Stated Value Per Share	$ 1	$ 1
Common Stock, Shares, Issued	50,141,343	50,074,310
Stock Repurchased During Period, Shares	500,000	500,000	250,000
Stock Repurchased During Period, Value	$ 23,228	$ 19,290	$ 15,510
Common Stock, Shares, Outstanding	50,141,343	50,074,310	50,310,803	50,228,543
2010 Share Repurchase Program [Member]
Stock Repurchase Program, Authorized Amount	$ 100,000				$ 100,000
Stock Repurchased During Period, Shares	500,000	500,000	250,000
Stock Repurchased During Period, Value	$ 20,861	$ 17,066	$ 12,254
Stock Repurchase Program, Remaining Authorized Repurchase Amount	$ 24,036