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Goodwill and Other Intangible Assets - Schedule of Components of Amortized Intangible Assets , Includes in Other Net (Detail) (USD $) In Thousands, unless otherwise specified	Jan. 03, 2015	Dec. 28, 2013
Schedule Of Intangible Assets Other Than Goodwill [Line Items]
Gross Carrying Amount	$ 41,262	$ 44,086
Accumulated Amortization	16,457	15,028
Non-compete agreements [Member]
Schedule Of Intangible Assets Other Than Goodwill [Line Items]
Gross Carrying Amount	2,528	4,566
Accumulated Amortization	1,836	3,427
Favorable leases [Member]
Schedule Of Intangible Assets Other Than Goodwill [Line Items]
Gross Carrying Amount	8,408	8,408
Accumulated Amortization	2,718	2,215
Pharmacy customer prescription lists [Member]
Schedule Of Intangible Assets Other Than Goodwill [Line Items]
Gross Carrying Amount	16,494	17,423
Accumulated Amortization	10,574	8,946
Customer relationships [Member]
Schedule Of Intangible Assets Other Than Goodwill [Line Items]
Gross Carrying Amount	12,100	12,100
Accumulated Amortization	684	78
Trade Name [Member]
Schedule Of Intangible Assets Other Than Goodwill [Line Items]
Gross Carrying Amount	1,218	1,219
Accumulated Amortization	461	233
Franchise fees and other [Member]
Schedule Of Intangible Assets Other Than Goodwill [Line Items]
Gross Carrying Amount	514	370
Accumulated Amortization	$ 184	$ 129