Acquisitions and Divestitures - Additional Information (Detail) - USD ($)		3 Months Ended		9 Months Ended
	Oct. 02, 2017	Sep. 30, 2018	Dec. 31, 2017	Sep. 30, 2018	Oct. 01, 2017
Business Acquisition [Line Items]
Gain on exchange transactions		$ 10,170,000		$ 10,170,000
Final settlement amount				(1,811,000)	$ 227,769,000
Transaction related expenses incurred					$ 5,600,000
CCR Exchange Business [Member]
Business Acquisition [Line Items]
Effective date of business acquisition	Oct. 02, 2017
Cash purchase	$ 15,900,000
Final settlement amount		26,200,000
Increase (decrease) cash purchase price		10,300,000
Goodwill expected to be deductible for tax purposes		3,500,000		3,500,000
Memphis Territory [Member]
Business Acquisition [Line Items]
Effective date of business acquisition	Oct. 02, 2017
Cash purchase	$ 39,600,000
Increase (decrease) cash purchase price		2,600,000
Goodwill expected to be deductible for tax purposes		8,600,000		8,600,000
United Exchange Business [Member]
Business Acquisition [Line Items]
Effective date of business acquisition	Oct. 02, 2017
Cash purchase	$ 3,400,000
Increase (decrease) cash purchase price		2,800,000
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
Akron, Elyria, Toledo, Willoughby and Youngstown, Ohio and a regional manufacturing facility and related assets located in Twinsburg, Ohio | CCR [Member]
Business Acquisition [Line Items]
Increase (decrease) cash purchase price			$ (4,700,000)
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