Franchise Rights and Goodwill - Additional Information (Detail) - USD ($) $ in Millions	9 Months Ended
Sep. 27, 2015	Sep. 28, 2014
Goodwill [Line Items]
Goodwill acquired during the period	$ 6.2	$ 1.2
Goodwill recorded during measurement period adjustments		$ 1.1
Lexington Expansion [Member]
Goodwill [Line Items]
Goodwill period increase (decrease)	2.5
Franchise rights increase (decrease) during the period	18.2
Jackson Territory [Member]
Goodwill [Line Items]
Goodwill period increase (decrease)	(2.2)
Franchise rights increase (decrease) during the period	$ (11.3)

Franchise rights increase decrease during period due to acquisition.

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- Definition

Amount of increase in asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized resulting from a business combination.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

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Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table.

+ References

No definition available.

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Amount of increase (decrease) of an asset representing future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 20

-Section 50

-Paragraph 1

-URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267

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Amount of increase (decrease) from adjustments after acquisition date under purchase accounting of an asset representing the future economic benefits arising from other assets acquired in a business combination that are not individually identified and separately recognized.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 10

-Section 25

-Paragraph 16

-URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e961-128460

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-Publisher FASB

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