Acquisitions and Divestitures - Additional Information (Detail) - USD ($)			3 Months Ended					12 Months Ended
	Oct. 02, 2017	Apr. 28, 2017	Dec. 30, 2018	Sep. 30, 2018	Jul. 01, 2018	Dec. 31, 2017	Apr. 02, 2017	Dec. 30, 2018	Dec. 31, 2017	Jan. 01, 2017
Business Acquisition [Line Items]
Gain (loss) on exchange transactions								$ 10,170,000	$ 12,893,000	$ (692,000)
Final cash purchase price or settlement amount								$ (456,000)	265,060,000	$ 272,637,000
Amortization period of Legacy facilities credit as reduction to cost of sales								40 years
Transaction related expenses incurred									6,800,000
Legacy Facilities Credit [Member]
Business Acquisition [Line Items]
Amount of compensation paid				$ 44,300,000
Distribution Agreements [Member]
Business Acquisition [Line Items]
Estimated useful life							40 years
CCR [Member] | Legacy Facilities Credit [Member]
Business Acquisition [Line Items]
Amortization period of Legacy facilities credit as reduction to cost of sales								40 years
C C R Exchange Transaction And United Exchange Transaction [Member]
Business Acquisition [Line Items]
Gain (loss) on exchange transactions									500,000
Akron, Elyria, Toledo, Willoughby and Youngstown, Ohio Distribution Territories Acquisitions and Twinsburg, Ohio Regional Manufacturing Facility Acquisition [Member] | CCR [Member]
Business Acquisition [Line Items]
Cash purchase		$ 87,900,000
Increase (decrease) cash purchase price						$ (4,700,000)
Final cash purchase price or settlement amount					$ 83,200,000
CCR Exchange Business [Member]
Business Acquisition [Line Items]
Cash purchase	$ 15,900,000
Final cash purchase price or settlement amount			$ 10,300,000	26,200,000
Effective date of business acquisition	Oct. 02, 2017
Goodwill expected to be deductible for tax purposes			3,500,000					$ 3,500,000
Memphis Territory [Member]
Business Acquisition [Line Items]
Cash purchase	$ 39,600,000
Increase (decrease) cash purchase price				2,600,000
Final cash purchase price or settlement amount				$ 42,200,000
Effective date of business acquisition	Oct. 02, 2017
Goodwill expected to be deductible for tax purposes			8,600,000					8,600,000
United Exchange Business [Member]
Business Acquisition [Line Items]
Cash purchase	$ 3,400,000
Increase (decrease) cash purchase price			2,800,000
Final cash purchase price or settlement amount			6,200,000
Effective date of business acquisition	Oct. 02, 2017
Goodwill expected to be deductible for tax purposes			2,700,000					2,700,000
Akron, Elyria, Toledo, Willoughby and Youngstown, Ohio and a regional manufacturing facility and related assets located in Twinsburg, Ohio
Business Acquisition [Line Items]
Goodwill expected to be deductible for tax purposes			11,400,000					11,400,000
January 2017 Transactions [Member]
Business Acquisition [Line Items]
Goodwill expected to be deductible for tax purposes			0					0
March 2017 Transactions [Member]
Business Acquisition [Line Items]
Goodwill expected to be deductible for tax purposes			$ 0					$ 0
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
Mobile, Alabama Facility [Member] | CCR [Member]
Business Acquisition [Line Items]
Fee recognized from related party									$ 12,400,000