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REVENUE RECOGNITION
 12 Months Ended
Dec. 31, 2021
Revenue from Contract with Customer [Abstract]  
REVENUE RECOGNITION REVENUE RECOGNITIONWe disaggregate our revenues by applicable service line as follows: collection, landfill, transfer, transportation, landfill gas-to-energy, processing and non-processing.
Collection
Collection revenues are principally generated by providing waste collection and disposal services to our customers. Services may be provided as needed or as scheduled. We derive a substantial portion of our collection revenues from commercial and industrial services, which typically have a standard contract duration of three years, along with municipal services that are generally performed pursuant to contracts with municipalities with varying terms. The majority of our residential collection services are performed on a subscription basis with individual households.
Landfill
Landfill disposal services primarily consist of receiving some form of acceptable solid waste materials at one of our landfills and appropriately disposing of it. Landfill customers are typically charged a tipping fee on a per ton basis for disposing of their solid waste at our disposal facilities. In general, these fees are variable in nature.
Transfer station
Transfer station disposal services primarily consist of receiving some form of acceptable solid waste materials at one of our transfer stations and appropriately disposing of it by transporting it to an appropriate disposal site. Transfer station customers are charged a tipping fee on a per ton basis for disposing of their solid waste at our transfer stations. In general, these fees are variable in nature.
Transportation
Transportation services consist of the transportation of large volumes of waste or recycled materials from a customer designated location to another location or disposal facility. Transportation customers are charged a fee on a per ton basis for transporting and/or disposal of the materials. In general, these fees are variable in nature.
Landfill gas-to-energy
Landfill gas-to-energy services primarily consist of the generation and sale of electricity from landfill gas-to-energy facilities located at certain of our landfills; the reservation of electric generating capacity to be used by a customer on demand; and the sale of RECs.
Processing
Processing services consist of the receipt of recycled, sludge or other organic materials at one of our materials recovery, processing or disposal facilities, where it is then sorted, mixed and/or processed, and then disposed of or sold. Revenues from processing services are derived from municipalities and customers in the form of processing fees, tipping fees, commodity sales, and organic material sales.
Non-processing
Revenues from non-processing services are derived from brokerage services; overall resource management services providing a wide range of environmental services and zero waste solutions to large and complex organizations; and traditional collection, disposal and recycling services provided to large account multi-site customers. In brokerage arrangements, we act as an agent that facilitates the sale of recyclable materials between an inbound customer and an outbound customer. Revenues from the brokerage of recycled materials are recognized on a net basis at the time of shipment. In general, these fees are variable in nature.
A table of revenues disaggregated by service line and timing of revenue recognition by operating segment follows:
Fiscal Year Ended December 31, 2021
EasternWesternResource SolutionsTotal Revenues
Collection$175,816 $266,869 $— $442,685 
Landfill25,241 66,732 — 91,973 
Transfer53,882 37,400 — 91,282 
Transportation1,683 12,047 — 13,730 
Landfill gas-to-energy1,052 4,086 — 5,138 
Processing6,895 2,386 93,323 102,604 
Non-processing— — 141,799 141,799 
Total revenues$264,569 $389,520 $235,122 $889,211 
Transferred at a point-in-time$166 $1,719 $63,666 $65,551 
Transferred over time264,403 387,801 171,456 823,660 
Total revenues$264,569 $389,520 $235,122 $889,211 
Fiscal Year Ended December 31, 2020
EasternWesternResource SolutionsTotal Revenues
Collection$147,698 $243,740 $— $391,438 
Landfill20,716 64,833 — 85,549 
Transfer44,730 34,117 — 78,847 
Transportation208 10,942 — 11,150 
Landfill gas-to-energy1,015 3,057 — 4,072 
Processing5,918 1,300 62,539 69,757 
Non-processing— — 133,771 133,771 
Total revenues$220,285 $357,989 $196,310 $774,584 
Transferred at a point-in-time$223 $1,484 $29,621 $31,328 
Transferred over time220,062 356,505 166,689 743,256 
Total revenues$220,285 $357,989 $196,310 $774,584 

Fiscal Year Ended December 31, 2019
EasternWesternResource SolutionsTotal Revenues
Collection$149,165 $222,876 $— $372,041 
Landfill19,362 73,657 — 93,019 
Transfer44,413 31,640 — 76,053 
Transportation198 12,625 — 12,823 
Landfill gas-to-energy890 2,686 — 3,576 
Processing5,447 1,728 53,981 61,156 
Non-processing— — 124,622 124,622 
Total revenues$219,475 $345,212 $178,603 $743,290 
Transferred at a point-in-time$159 $921 $23,206 $24,286 
Transferred over time219,316 344,291 155,397 719,004 
Total revenues$219,475 $345,212 $178,603 $743,290