XML 56 R44.htm IDEA: XBRL DOCUMENT
v3.22.0.1

OTHER ITEMS AND CHARGES (Tables) | 12 Months Ended
--- | ---
Dec. 31, 2021
Unusual or Infrequent Items, or Both [Abstract] |
Schedule of Southbridge Landfill Closure Charge, Net | Accordingly, in fiscal years 2021, 2020 and 2019, we recorded charges associated with the closure of the Southbridge Landfill as follows:
| Fiscal Year Ended December 31,
| 2021 |  | 2020 |  | 2019
Legal and transaction costs (1) | $ | 868 |  |  | $ | 2,285 |  |  | $ | 2,709 |
Contract settlement charge (2) | 572 |  |  | — |  |  | — |
Landfill closure project (credit) charge (3) | (944) |  |  | 490 |  |  | — |
Legal settlement charge (4) | — |  |  | 2,000 |  |  | — |
Environmental remediation charge (5) | — |  |  | (188) |  |  | — |
Southbridge Landfill closure charge, net | $ | 496 |  |  | $ | 4,587 |  |  | $ | 2,709 |
(1)We incurred legal costs as well as other transaction costs associated with various matters as part of the Southbridge Landfill closure. (2)We updated the cost estimates associated with a contract settlement charge associated with the Southbridge Landfill closure and the remaining future obligations due to the Town of Southbridge under the landfill operating agreement with the Town of Southbridge. (3)We recorded a landfill closure project (credit) charge associated with revised costs under the closure plan at Southbridge Landfill. (4)We established reserves and made payments associated with legal settlements associated with claims against us as part of the Southbridge Landfill closure. (5)We recorded an environmental remediation reversal associated with the completion of environmental remediation at the Southbridge Landfill.

X
- Definition Tabular disclosure of the Southbridge Landfill Closure Charge, Net + References No definition available. + Details
Name: | cwst_ScheduleOfSouthbridgeLandfillClosureChargeNetTableTextBlock
Namespace Prefix: | cwst_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- References No definition available. + Details
Name: | us-gaap_ExtraordinaryAndUnusualItemsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration