Note 19 - Segment Information (Details Textual) $ in Thousands	12 Months Ended
Nov. 30, 2019 USD ($)	Nov. 24, 2018 USD ($)	Nov. 25, 2017 USD ($)
Number of Reportable Segments	3
SGA Expenses Excluding New Store Pre-opening Costs	$ 264,280	$ 260,339	$ 245,493
Zenith Freight Lines [Member]
SGA Expenses Excluding New Store Pre-opening Costs	$ 78,220	$ 81,468	$ 80,068

Number of segments reported by the entity. A reportable segment is a component of an entity for which there is an accounting requirement to report separate financial information on that component in the entity's financial statements.

No definition available.

Name:	us-gaap_NumberOfReportableSegments
Namespace Prefix:	us-gaap_
Data Type:	xbrli:integerItemType
Balance Type:	na
Period Type:	duration