Revenue Recognition

12 Months Ended

Dec. 29, 2018

Revenue from External Customer [Line Items]

Revenue Recognition

Revenue Recognition

We derive our revenue predominantly by selling construction materials, products and providing paving and related services. Construction materials consist of aggregates and cement. Products consist of related downstream products, including ready-mix concrete, asphalt paving mix and concrete products. Paving and related service revenue is generated primarily from the asphalt paving services that we provide. 

Revenue by product for the years ended December 29, 2018, December 30, 2017 and December 31, 2016 consisted of the following:

	2018		2017		2016
Revenue by product*:
Aggregates	$	373,824	$	313,383	$	264,609
Cement	258,876		282,041		250,349
Ready-mix concrete	584,114		492,302		395,917
Asphalt	301,247		285,653		239,419
Paving and related services	379,540		371,763		304,041
Other	203,401		187,433		171,728
Total revenue	$	2,101,002	$	1,932,575	$	1,626,063

______________________

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

The following table outlines the significant changes in contract assets and contract liability balances from December 30, 2017 to December 29, 2018. 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 30, 2017	$	9,512		$	15,750
Changes in revenue billed, contract price or cost estimates	8,702			(5,052		)
Acquisitions	483			1,179
Other	(95		)	(37		)
Balance—December 29, 2018	$	18,602		$	11,840

Accounts receivable, net consisted of the following as of December 29, 2018 and December 30, 2017:

	2018			2017
Trade accounts receivable	$	157,601		$	137,696
Construction contract receivables	47,994			49,832
Retention receivables	15,010			14,973
Receivables from related parties	629			468
Accounts receivable	221,234			202,969
Less: Allowance for doubtful accounts	(6,716		)	(4,639		)
Accounts receivable, net	$	214,518		$	198,330

Retention receivables are amounts earned by the Company but held by customers until paving and related service contracts and projects are near completion or fully completed. Amounts are generally billed and collected within one year.

Summit Materials, LLC

Revenue from External Customer [Line Items]

Revenue Recognition

Revenue Recognition

We derive our revenue predominantly by selling construction materials, products and providing paving and related services. Construction materials consist of aggregates and cement. Products consist of related downstream products, including ready-mix concrete, asphalt paving mix and concrete products. Paving and related service revenue is generated primarily from the asphalt paving services that we provide. 

Revenue by product for the years ended December 29, 2018, December 30, 2017 and December 31, 2016 consisted of the following:

	2018		2017		2016
Revenue by product*:
Aggregates	$	373,824	$	313,383	$	264,609
Cement	258,876		282,041		250,349
Ready-mix concrete	584,114		492,302		395,917
Asphalt	301,247		285,653		239,419
Paving and related services	379,540		371,763		304,041
Other	203,401		187,433		171,728
Total revenue	$	2,101,002	$	1,932,575	$	1,626,063

______________________

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

The following table outlines the significant changes in contract assets and contract liability balances from December 30, 2017 to December 29, 2018. 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 30, 2017	$	9,512		$	15,750
Changes in revenue billed, contract price or cost estimates	8,702			(5,052		)
Acquisitions	483			1,179
Other	(95		)	(37		)
Balance—December 29, 2018	$	18,602		$	11,840

Accounts receivable, net consisted of the following as of December 29, 2018 and December 30, 2017:

	2018			2017
Trade accounts receivable	$	157,601		$	137,696
Construction contract receivables	47,994			49,832
Retention receivables	15,010			14,973
Receivables from related parties	629			468
Accounts receivable	221,234			202,969
Less: Allowance for doubtful accounts	(6,716		)	(4,639		)
Accounts receivable, net	$	214,518		$	198,330

Retention receivables are amounts earned by the Company but held by customers until paving and related service contracts and projects are near completion or fully completed. Amounts are generally billed and collected within one year.