Goodwill And Other Intangible Assets (Changes in Carrying Value of Routes Held For Sale) (Details) - Routes Intangible Assets Held For Sale - USD ($) $ in Thousands	12 Months Ended
Dec. 30, 2017	Dec. 31, 2016
Indefinite-lived Intangible Assets [Roll Forward]
Beginning balance of routes	$ 19,502	$ 15,590
Purchases of route businesses held for sale	53,907	42,206
Sales of route businesses held for sale	(54,329)	(38,278)
Reclassifications from route intangibles and goodwill	605	724
Impairment charges	0	(740)
Reclassification of Goodwill due to adoption of new accounting standard	(1,539)
Ending balance of routes	$ 18,146	$ 19,502

Reclassifications From Route Intangibles And Goodwill

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- Definition

Reclassifications of Goodwill Due to Change in Accounting Principle

+ References

No definition available.

+ Details

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- Definition

Sales Of Route Businesses

+ References

No definition available.

+ Details

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- Definition

The amount of impairment loss recognized in the period resulting from the write-down of the carrying amount of an intangible asset (excluding goodwill) to fair value.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 3
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16373-109275

Reference 2: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 230
-SubTopic 10
-Section 45
-Paragraph 28
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585

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- Definition

Amount of assets, excluding financial assets and goodwill, lacking physical substance and having a projected indefinite period of benefit.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 350
-SubTopic 30
-Section 50
-Paragraph 2
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

A roll forward is a reconciliation of a concept from the beginning of a period to the end of a period.

+ References

No definition available.

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- Definition

Amount of increase in assets, excluding financial assets and goodwill, lacking physical substance with an indefinite life, from an acquisition.

+ References

No definition available.

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