Consolidated Statements of Stockholders' Equity - USD ($) $ in Thousands	Common Stock [Member]	Additional Paid-in Capital [Member]	Retained Earnings [Member]	AOCI Attributable to Parent [Member]	Total
Balance (in shares) at Nov. 29, 2014	10,493,393
Balance at Nov. 29, 2014	$ 52,467		$ 106,339	$ (1,974)	$ 156,832
Net income			20,433		20,433
Actuarial adjustment to SERP, net of tax				(704)	(704)
Regular dividends			(3,684)		(3,684)
Special dividend			(2,184)		(2,184)
Issuance of common stock (in shares)	503,814
Issuance of common stock	$ 2,519	3,511			6,030
Purchase and retirement of common stock (in shares)	(81,186)
Purchase and retirement of common stock	$ (406)	(1,843)			(2,249)
Stock-based compensation		894			894
Excess tax benefits from Stock-based compensation		1,998			1,998
Balance (in shares) at Nov. 28, 2015	10,916,021
Balance at Nov. 28, 2015	$ 54,580	4,560	120,904	(2,678)	177,366
Net income			15,829		15,829
Actuarial adjustment to SERP, net of tax				125	125
Regular dividends			(4,127)		(4,127)
Special dividend			(3,218)		(3,218)
Issuance of common stock (in shares)	64,316
Issuance of common stock	$ 322	(25)			297
Purchase and retirement of common stock (in shares)	(257,390)
Purchase and retirement of common stock	$ (1,287)	(5,183)			(6,470)
Stock-based compensation		903			$ 903
Balance (in shares) at Nov. 26, 2016	10,722,947				10,722,947
Balance at Nov. 26, 2016	$ 53,615	255	129,388	(2,553)	$ 180,705
Net income			18,256		18,256
Actuarial adjustment to SERP, net of tax				511	511
Regular dividends			(4,508)		(4,508)
Special dividend			(3,758)		(3,758)
Issuance of common stock (in shares)	39,313
Issuance of common stock	$ 197	281			478
Purchase and retirement of common stock (in shares)	(24,310)
Purchase and retirement of common stock	$ (122)	(602)			(724)
Stock-based compensation		1,028			1,028
Prior service cost of LTCA, net of tax				(528)	$ (528)
Balance (in shares) at Nov. 25, 2017	10,737,950				10,737,952
Balance at Nov. 25, 2017	$ 53,690	$ 962	$ 139,378	$ (2,570)	$ 191,460