Goodwill and Other Intangible Assets - Schedule of Components of Amortized Intangible Assets , Includes in Other Assets, Net (Detail) - USD ($) $ in Thousands	Dec. 31, 2016	Jan. 02, 2016
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	$ 36,786	$ 37,106
Accumulated Amortization	10,923	9,013
Non-compete agreements [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,244	1,306
Accumulated Amortization	978	725
Favorable leases [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	8,744	8,744
Accumulated Amortization	3,807	3,248
Pharmacy customer prescription lists [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	7,168	7,887
Accumulated Amortization	3,445	3,441
Customer relationships [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	17,633	17,542
Accumulated Amortization	2,187	1,308
Trade Name [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	1,068	1,068
Accumulated Amortization	236	86
Franchise fees and other [Member]
Finite Lived Intangible Assets [Line Items]
Gross Carrying Amount	929	559
Accumulated Amortization	$ 270	$ 205