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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. 29, 2018 | Dec. 30, 2017
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Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | $ 77,519 | $ 78,521
Accumulated Amortization | 18,338 | 13,879
Non-compete agreements [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 3,358 | 3,408
Accumulated Amortization | 886 | 397
Favorable leases [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 7,738 | 8,251
Accumulated Amortization | 4,282 | 4,332
Pharmacy customer prescription lists [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 6,354 | 6,810
Accumulated Amortization | 4,377 | 4,210
Customer relationships [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 57,937 | 57,937
Accumulated Amortization | 7,835 | 4,173
Trade Names [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 1,068 | 1,068
Accumulated Amortization | 536 | 386
Franchise fees and other [Member] |  |
Finite Lived Intangible Assets [Line Items] |  |
Gross Carrying Amount | 1,064 | 1,047
Accumulated Amortization | $ 422 | $ 381

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