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Goodwill and Other Intangible Assets - Schedule of Components of Amortized Intangible Assets , Includes in Intangible Assets, Net (Detail) - USD ($) $ in Thousands	Dec. 30, 2017	Dec. 31, 2016
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 78,521	$ 36,786
Accumulated Amortization	13,879	10,923
Non-compete agreements [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	3,408	1,244
Accumulated Amortization	397	978
Favorable leases [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,251	8,744
Accumulated Amortization	4,332	3,807
Pharmacy customer prescription lists [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	6,810	7,168
Accumulated Amortization	4,210	3,445
Customer relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	57,937	17,633
Accumulated Amortization	4,173	2,187
Trade Names [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,068	1,068
Accumulated Amortization	386	236
Franchise fees and other [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,047	929
Accumulated Amortization	$ 381	$ 270

X

- Definition

Accumulated amount of amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ 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 (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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- Definition

Amount before amortization of assets, excluding financial assets and goodwill, lacking physical substance with a finite life.

+ 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 (a)(1)
-URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16323-109275

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+ References

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