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. 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 dividends			(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
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 dividends			(3,758)		(3,758)
Issuance of common stock (in shares)	39,313
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)
Issuance of common stock	$ 197	281			$ 478
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
Net income			8,218		8,218
Actuarial adjustment to SERP, net of tax				683	683
Regular dividends			(5,041)		(5,041)
Issuance of common stock (in shares)	63,403
Purchase and retirement of common stock (in shares)	(273,717)
Purchase and retirement of common stock	$ (1,369)	(2,160)	(3,091)		(6,620)
Stock-based compensation		1,133			1,133
Prior service cost of LTCA, net of tax				94	94
Issuance of common stock	317	65			382
Reclassification of certain tax effects to retained earnings (1)			545	(545)
Balance (in shares) at Nov. 24, 2018	10,527,636				10,527,636
Balance at Nov. 24, 2018	$ 52,638		$ 140,009	$ (2,338)	$ 190,309