Acquisitions and Divestitures - Summary of Fair Value Acquired Identifiable Intangible Assets (Detail) - USD ($) $ in Thousands							3 Months Ended
	Mar. 31, 2017	Jan. 27, 2017	Jan. 01, 2017	Oct. 28, 2016	Apr. 29, 2016	Jan. 29, 2016	Apr. 02, 2017
Acquired Intangible Assets [Line Items]
Franchise rights			$ 533,040				$ 0
Easton and Salisbury, Maryland and Richmond and Yorktown, Virginia Expansion Territories Acquisitions and Sandston, Virginia Expansion Facility Acquisition [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets						$ 1,300
Baltimore, Hagerstown and Cumberland, Maryland Expansion Territories Acquisitions and Silver Spring and Baltimore, Maryland Expansion Facilities Acquisitions [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets					$ 23,450
Cincinnati, Dayton, Lima and Portsmouth, Ohio and Louisa, Kentucky Expansion Territories Acquisitions and Cincinnati, Ohio Expansion Facility Acquisition [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets				$ 66,500
2016 Acquisition [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets			91,250
Bloomington and Indianapolis, Indiana and Columbus and Mansfield, Ohio Expansion Territories Acquisitions and Indianapolis and Portland, Indiana Expansion Facilities Acquisitions [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets	$ 20,400
Anderson, Fort Wayne, Lafayette, South Bend and Terre Haute, Indiana Expansion Territories Acquisitions [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets		$ 10,650
2017 Acquisition [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets							31,050
Distribution Agreements [Member] | Easton and Salisbury, Maryland and Richmond and Yorktown, Virginia Expansion Territories Acquisitions and Sandston, Virginia Expansion Facility Acquisition [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets						$ 750
Estimated useful life						40 years
Distribution Agreements [Member] | Baltimore, Hagerstown and Cumberland, Maryland Expansion Territories Acquisitions and Silver Spring and Baltimore, Maryland Expansion Facilities Acquisitions [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets					$ 22,000
Estimated useful life					40 years
Distribution Agreements [Member] | Cincinnati, Dayton, Lima and Portsmouth, Ohio and Louisa, Kentucky Expansion Territories Acquisitions and Cincinnati, Ohio Expansion Facility Acquisition [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets				$ 63,900
Estimated useful life				40 years
Distribution Agreements [Member] | 2016 Acquisition [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets			$ 86,650
Estimated useful life			40 years
Distribution Agreements [Member] | Bloomington and Indianapolis, Indiana and Columbus and Mansfield, Ohio Expansion Territories Acquisitions and Indianapolis and Portland, Indiana Expansion Facilities Acquisitions [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets	$ 18,900
Estimated useful life	40 years
Distribution Agreements [Member] | Anderson, Fort Wayne, Lafayette, South Bend and Terre Haute, Indiana Expansion Territories Acquisitions [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets		$ 9,300
Estimated useful life		40 years
Distribution Agreements [Member] | 2017 Acquisition [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets							$ 28,200
Distribution Agreements [Member] | 2017 Acquisition [Member]
Acquired Intangible Assets [Line Items]
Estimated useful life							40 years
Customer Lists [Member] | Easton and Salisbury, Maryland and Richmond and Yorktown, Virginia Expansion Territories Acquisitions and Sandston, Virginia Expansion Facility Acquisition [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets						$ 550
Estimated useful life						12 years
Customer Lists [Member] | Baltimore, Hagerstown and Cumberland, Maryland Expansion Territories Acquisitions and Silver Spring and Baltimore, Maryland Expansion Facilities Acquisitions [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets					$ 1,450
Estimated useful life					12 years
Customer Lists [Member] | Cincinnati, Dayton, Lima and Portsmouth, Ohio and Louisa, Kentucky Expansion Territories Acquisitions and Cincinnati, Ohio Expansion Facility Acquisition [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets				$ 2,600
Estimated useful life				12 years
Customer Lists [Member] | 2016 Acquisition [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets			$ 4,600
Estimated useful life			12 years
Customer Lists [Member] | Bloomington and Indianapolis, Indiana and Columbus and Mansfield, Ohio Expansion Territories Acquisitions and Indianapolis and Portland, Indiana Expansion Facilities Acquisitions [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets	$ 1,500
Estimated useful life	12 years
Customer Lists [Member] | Anderson, Fort Wayne, Lafayette, South Bend and Terre Haute, Indiana Expansion Territories Acquisitions [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets		$ 1,350
Estimated useful life		12 years
Customer Lists [Member] | 2017 Acquisition [Member]
Acquired Intangible Assets [Line Items]
Total other acquired identifiable intangible assets							$ 2,850
Customer Lists [Member] | 2017 Acquisition [Member]
Acquired Intangible Assets [Line Items]
Estimated useful life							12 years