Inventories (Tables)

12 Months Ended

Jan. 02, 2021

Inventory [Line Items]

Components of Inventories

Inventories consisted of the following as of January 2, 2021 and December 28, 2019:

	2020		2019
Aggregate stockpiles	$	137,938	$	140,461
Finished goods	32,993		33,023
Work in process	9,281		7,664
Raw materials	20,096		23,639
Total	$	200,308	$	204,787

Summit Materials, LLC

Inventory [Line Items]

Components of Inventories

Inventories consisted of the following as of January 2, 2021 and December 28, 2019:

	2020		2019
Aggregate stockpiles	$	137,938	$	140,461
Finished goods	32,993		33,023
Work in process	9,281		7,664
Raw materials	20,096		23,639
Total	$	200,308	$	204,787