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REVENUE RECOGNITION
 9 Months Ended
Oct. 02, 2021
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 three and nine months ended October 2, 2021 and September 26, 2020 is as follows:
 Three months endedNine months ended
 October 2, 2021September 26, 2020October 2, 2021September 26, 2020
Revenue by product*:    
Aggregates$160,317 $136,396 $431,201 $362,546 
Cement87,645 82,698 207,953 188,854 
Ready-mix concrete183,114 179,124 525,208 488,710 
Asphalt116,364 128,125 238,674 255,992 
Paving and related services112,671 136,191 257,966 280,446 
Other57,129 47,085 151,999 131,270 
Total revenue$717,240 $709,619 $1,813,001 $1,707,818 
*Revenue from liquid asphalt terminals is included in asphalt revenue.
 
Accounts receivable, net consisted of the following as of October 2, 2021 and January 2, 2021: 
 October 2, 2021January 2, 2021
Trade accounts receivable$268,188 $191,871 
Construction contract receivables53,647 47,179 
Retention receivables14,894 18,824 
Receivables from related parties877 1,339 
Accounts receivable337,606 259,213 
Less: Allowance for doubtful accounts(4,255)(4,517)
Accounts receivable, net$333,351 $254,696 
 
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 three and nine months ended October 2, 2021 and September 26, 2020 is as follows:
 Three months endedNine months ended
 October 2, 2021September 26, 2020October 2, 2021September 26, 2020
Revenue by product*:    
Aggregates$160,317 $136,396 $431,201 $362,546 
Cement87,645 82,698 207,953 188,854 
Ready-mix concrete183,114 179,124 525,208 488,710 
Asphalt116,364 128,125 238,674 255,992 
Paving and related services112,671 136,191 257,966 280,446 
Other57,129 47,085 151,999 131,270 
Total revenue$717,240 $709,619 $1,813,001 $1,707,818 
*Revenue from liquid asphalt terminals is included in asphalt revenue.

Accounts receivable, net consisted of the following as of October 2, 2021 and January 2, 2021:
 
 October 2, 2021January 2, 2021
Trade accounts receivable$268,188 $191,871 
Construction contract receivables53,647 47,179 
Retention receivables14,894 18,824 
Receivables from related parties877 1,339 
Accounts receivable337,606 259,213 
Less: Allowance for doubtful accounts(4,255)(4,517)
Accounts receivable, net$333,351 $254,696 
 
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.