Revenue Recognition (Tables)

12 Months Ended

Jan. 02, 2021

Revenue from External Customer [Line Items]

Summary of Revenue by Products

Revenue by product for the years ended January 2, 2021, December 28, 2019 and December 29, 2018 consisted of the following:

	2020		2019		2018
Revenue by product*:
Aggregates	$	498,007	$	469,670	$	373,824
Cement	257,629		266,235		258,876
Ready-mix concrete	668,060		607,622		584,114
Asphalt	349,350		330,750		301,247
Paving and related services	381,430		360,234		379,540
Other	177,975		187,629		203,401
Total revenue	$	2,332,451	$	2,222,140	$	2,101,002

______________________

 *       Revenue from the liquid asphalt terminals is included in asphalt revenue.

Summary of Contract Assets and Liabilities

The following table outlines the significant changes in contract assets and contract liability balances from December 28, 2019 to January 2, 2021. Also included in the table is the net change in the estimate as a percentage of aggregate revenue for such contracts: 

	Costs and estimated		Billings in excess
	earnings in		of costs and
	excess of billings		estimated earnings
Balance—December 28, 2019	$	13,088	$	13,864
Changes in revenue billed, contract price or cost estimates	(4,535)		2,616
Other	113		19
Balance—January 2, 2021	$	8,666	$	16,499

Summary of Accounts Receivable, Net

Accounts receivable, net consisted of the following as of January 2, 2021 and December 28, 2019:

	2020		2019
Trade accounts receivable	$	191,871	$	191,672
Construction contract receivables	47,179		47,966
Retention receivables	18,824		17,808
Receivables from related parties	1,339		1,596
Accounts receivable	259,213		259,042
Less: Allowance for doubtful accounts	(4,517)		(5,786)
Accounts receivable, net	$	254,696	$	253,256

Summit Materials, LLC

Revenue from External Customer [Line Items]

Summary of Revenue by Products

Revenue by product for the years ended January 2, 2021, December 28, 2019 and December 29, 2018 consisted of the following:

	2020		2019		2018
Revenue by product*:
Aggregates	$	498,007	$	469,670	$	373,824
Cement	257,629		266,235		258,876
Ready-mix concrete	668,060		607,622		584,114
Asphalt	349,350		330,750		301,247
Paving and related services	381,430		360,234		379,540
Other	177,975		187,629		203,401
Total revenue	$	2,332,451	$	2,222,140	$	2,101,002

______________________

*Revenue from the liquid asphalt terminals is included in asphalt revenue.

Summary of Contract Assets and Liabilities

The following table outlines the significant changes in contract assets and contract liability balances from December 28, 2019 to January 2, 2021. Also included in the table is the net change in the estimate as a percentage of aggregate revenue for such contracts: 

	Costs and estimated		Billings in excess
	earnings in		of costs and
	excess of billings		estimated earnings
Balance—December 28, 2019	$	13,088	$	13,864
Changes in revenue billed, contract price or cost estimates	(4,535)		2,616
Other	113		19
Balance—January 2, 2021	$	8,666	$	16,499

Summary of Accounts Receivable, Net

Accounts receivable, net consisted of the following as of January 2, 2021 and December 28, 2019:

	2020		2019
Trade accounts receivable	$	191,871	$	191,672
Construction contract receivables	47,179		47,966
Retention receivables	18,824		17,808
Receivables from related parties	1,339		1,596
Accounts receivable	259,213		259,042
Less: Allowance for doubtful accounts	(4,517)		(5,786)
Accounts receivable, net	$	254,696	$	253,256