Inventories (Tables)

12 Months Ended

Dec. 28, 2019

Inventory [Line Items]

Components of Inventories

Inventories consisted of the following as of December 28, 2019 and December 29, 2018:

	2019		2018
Aggregate stockpiles	$	140,461	$	151,300
Finished goods	33,023		34,993
Work in process	7,664		7,478
Raw materials	23,639		20,080
Total	$	204,787	$	213,851

Summit Materials, LLC

Inventory [Line Items]

Components of Inventories

Inventories consisted of the following as of December 28, 2019 and December 29, 2018:

	2019		2018
Aggregate stockpiles	$	140,461	$	151,300
Finished goods	33,023		34,993
Work in process	7,664		7,478
Raw materials	23,639		20,080
Total	$	204,787	$	213,851