Acquisitions and Divestitures - Additional Information (Detail)								1 Months Ended				3 Months Ended		12 Months Ended
	Oct. 02, 2017 USD ($)	Apr. 28, 2017 USD ($)	Jan. 27, 2017 USD ($)	Oct. 28, 2016 USD ($)	Apr. 29, 2016 USD ($)	Apr. 01, 2016 USD ($)	Jan. 29, 2016 USD ($)	Dec. 31, 2017 USD ($)	Oct. 31, 2017 USD ($)	Apr. 30, 2017 USD ($)	Mar. 31, 2017 USD ($)	Dec. 31, 2017 USD ($)	Apr. 02, 2017	Dec. 31, 2017 USD ($) Facility	Jan. 01, 2017 USD ($)	Jan. 03, 2016 USD ($)	Dec. 31, 2015 USD ($)	Dec. 28, 2014 USD ($)	Dec. 26, 2017 USD ($)	Aug. 24, 2015 USD ($)
Business Acquisition [Line Items]
Gain (loss) on exchange transactions														$ 12,893,000	$ (692,000)	$ 8,807,000
Amortization period of Legacy facilities credit as reduction to cost of sales														40 years
Bargain purchase gain, net of tax of $1,265																2,011,000
Transaction related expenses incurred														$ 6,800,000	$ 6,100,000	5,800,000
Gain on sale of business																22,651,000
Disposal Group, Disposed of by Sale, Not Discontinued Operations [Member] | BYB Brands Inc [Member]
Business Acquisition [Line Items]
Cash purchase price on sale of brands																				$ 26,400,000
Gain on sale of business																	$ 22,700,000
Distribution Agreements [Member]
Business Acquisition [Line Items]
Estimated useful life													40 years
Manufacturing Facilities Letter Agreement
Business Acquisition [Line Items]
Aggregate valuation adjustment discount										$ 5,400,000	$ 22,900,000
Legacy Facilities Credit [Member]
Business Acquisition [Line Items]
Amount of compensation receivable																			$ 43,000,000
Amount of compensation paid								$ 43,000,000
CCR [Member]
Business Acquisition [Line Items]
Deferred liability recorded								30,600,000				$ 30,600,000		$ 30,600,000
Amortization period of Legacy facilities credit as reduction to cost of sales														40 years
CCR [Member] | Manufacturing Facilities Letter Agreement
Business Acquisition [Line Items]
Cash purchase											33,100,000
Aggregate valuation adjustment discount														$ 4,800,000
Number of additional expansion facility applicable for discount | Facility														2
Remaining outstanding amount								0				0		$ 0
CCR [Member] | Legacy Facilities Credit [Member]
Business Acquisition [Line Items]
Deferred liability recorded								$ 30,600,000				30,600,000		$ 30,600,000
Amortization period of Legacy facilities credit as reduction to cost of sales														40 years
C C R Exchange Transaction And United Exchange Transaction
Business Acquisition [Line Items]
Gain (loss) on exchange transactions														$ 500,000
Anderson, Fort Wayne, Lafayette, South Bend and Terre Haute, Indiana Expansion Territories Acquisitions [Member]
Business Acquisition [Line Items]
Goodwill recognized, expected to be deductible for tax purposes			$ 0
Anderson, Fort Wayne, Lafayette, South Bend and Terre Haute, Indiana Expansion Territories Acquisitions [Member] | CCR [Member]
Business Acquisition [Line Items]
Cash purchase			$ 32,100,000
Increase (decrease) cash purchase price														$ 500,000
Bloomington and Indianapolis, Indiana and Columbus and Mansfield, Ohio Expansion Territories Acquisitions and Indianapolis and Portland, Indiana Expansion Facilities Acquisitions [Member] | CCR [Member]
Business Acquisition [Line Items]
Cash purchase											104,600,000
Increase (decrease) cash purchase price												(4,100,000)
Akron, Elyria, Toledo, Willoughby and Youngstown, Ohio Expansion Territories Acquisitions and Twinsburg, Ohio Expansion Facility Acquisition [Member]
Business Acquisition [Line Items]
Goodwill recognized, expected to be deductible for tax purposes		$ 11,600,000
Akron, Elyria, Toledo, Willoughby and Youngstown, Ohio Expansion Territories Acquisitions and Twinsburg, Ohio Expansion Facility Acquisition [Member] | CCR [Member]
Business Acquisition [Line Items]
Cash purchase		$ 87,900,000
Increase (decrease) cash purchase price												$ (4,700,000)
October 2017 CCR Exchange Transaction
Business Acquisition [Line Items]
Effective date of business acquisition														Oct. 02, 2017
Arkansas Expansion Territory and Memphis and West Memphis Expansion Facilities Acquisition [Member] | CCR [Member]
Business Acquisition [Line Items]
Cash purchase									$ 15,900,000
Aggregate valuation adjustment discount									4,800,000
Memphis Expansion Territory [Member] | CCR [Member]
Business Acquisition [Line Items]
Cash purchase	$ 39,600,000
Effective date of business acquisition	Oct. 02, 2017
Acquisition of Spartanburg and Bluffton Expansion Territory in exchange for the Company’s Florence and Laurel Territory and Piedmont's Northeastern Georgia Territory [Member]
Business Acquisition [Line Items]
Cash purchase									$ 3,400,000
Effective date of business acquisition	Oct. 02, 2017
Memphis Tennessee For Leroy Mobile And Robertsdale Alabama Panama City Florida Bainbridge Columbus And Sylvester Georgia Ocean Springs Mississippi And Somerset Kentucky Exchange Acquisition | CCR [Member] | Legacy Facilities Credit [Member]
Business Acquisition [Line Items]
Gain (loss) on exchange transactions														$ 12,400,000
Coca Cola Refreshments Exchange Transactions
Business Acquisition [Line Items]
Goodwill recognized, expected to be deductible for tax purposes	$ 6,400,000
Memphis Transaction [Member]
Business Acquisition [Line Items]
Goodwill recognized, expected to be deductible for tax purposes	6,600,000
Memphis Transaction [Member] | CCR [Member]
Business Acquisition [Line Items]
Effective date of business acquisition														Oct. 02, 2017
Bloomington and Indianapolis, Indiana and Columbus and Mansfield, Ohio Expansion Territories Acquisitions and Indianapolis and Portland, Indiana Expansion Facilities Acquisitions [Member]
Business Acquisition [Line Items]
Goodwill recognized, expected to be deductible for tax purposes											$ 0
United Exchange Transaction Acquisitions
Business Acquisition [Line Items]
Goodwill recognized, expected to be deductible for tax purposes	$ 2,700,000
2017 Acquisition [Member] | Distribution Agreements [Member]
Business Acquisition [Line Items]
Estimated useful life														40 years
2017 Acquisition [Member] | Customer Lists [Member]
Business Acquisition [Line Items]
Estimated useful life														12 years
Easton and Salisbury, Maryland and Richmond and Yorktown, Virginia Expansion Territories Acquisitions and Sandston, Virginia Expansion Facility Acquisition [Member]
Business Acquisition [Line Items]
Cash purchase							$ 75,900,000
Effective date of business acquisition															Jan. 29, 2016
Goodwill recognized, expected to be deductible for tax purposes							14,900,000
Cash purchase price, settled beyond one year from transaction closing date							$ 10,200,000
Alexandria, Virginia and Capitol Heights and La Plata, Maryland Expansion Territories Acquisitions [Member]
Business Acquisition [Line Items]
Cash purchase						$ 34,800,000
Effective date of business acquisition															Apr. 01, 2016
Goodwill recognized, expected to be deductible for tax purposes						0
Cash purchase price, settled beyond one year from transaction closing date						$ 800,000
Baltimore, Hagerstown and Cumberland, Maryland Expansion Territories Acquisitions and Silver Spring and Baltimore, Maryland Expansion Facilities Acquisitions [Member]
Business Acquisition [Line Items]
Cash purchase					$ 68,500,000
Effective date of business acquisition															Apr. 29, 2016
Goodwill recognized, expected to be deductible for tax purposes					0
Cash purchase price, settled beyond one year from transaction closing date					$ 500,000
Cincinnati, Dayton, Lima and Portsmouth, Ohio and Louisa, Kentucky Expansion Territories Acquisitions and Cincinnati, Ohio Expansion Facility Acquisition [Member]
Business Acquisition [Line Items]
Cash purchase				$ 99,700,000
Effective date of business acquisition															Oct. 28, 2016
Goodwill recognized, expected to be deductible for tax purposes				$ 15,800,000
Cash purchase price increased from post-closing adjustments															$ 1,500,000
2015 Expansion Territories and 2015 Asset Exchange Center [Member]
Business Acquisition [Line Items]
Cash purchase																85,600,000
2015 Asset Exchange [Member]
Business Acquisition [Line Items]
Gain (loss) on exchange transactions																8,100,000
Bargain purchase gain, net of tax of $1,265																2,000,000
Deferred tax liability																$ 1,300,000
2014 Expansion Territories [Member] | CCR [Member]
Business Acquisition [Line Items]
Cash purchase																		$ 43,100,000