XML 60 R39.htm IDEA: XBRL DOCUMENT
v3.24.2.u1

BUSINESS COMBINATIONS - Narrative (Details) | 1 Months Ended | 6 Months Ended
--- | --- | ---
Aug. 02, 2024 business | Jun. 30, 2024 business | Jun. 30, 2023 business subsidiary
Business Acquisition [Line Items] |  |  |
Number of businesses acquired |  | 1 | 2
Number of wholly owned subsidiaries acquired | subsidiary |  |  | 4
Subsequent Event |  |  |
Business Acquisition [Line Items] |  |  |
Number of businesses acquired | 4 |  |
Subsequent Event | Mid-Atlantic |  |  |
Business Acquisition [Line Items] |  |  |
Number of businesses acquired | 3 |  |
Minimum |  |  |
Business Acquisition [Line Items] |  |  |
Useful life of finite lived intangible assets |  | 2 years |
Maximum |  |  |
Business Acquisition [Line Items] |  |  |
Useful life of finite lived intangible assets |  | 10 years |

X
- Definition Number Of Wholly Owned Subsidiaries Acquired + References No definition available. + Details
Name: | cwst_NumberOfWhollyOwnedSubsidiariesAcquired
Namespace Prefix: | cwst_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 805 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 5 -Subparagraph (a) -Publisher FASB -URI https://asc.fasb.org/1943274/2147479907/805-20-50-5 + Details
Name: | us-gaap_BusinessAcquisitionLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Useful life of finite-lived intangible assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References No definition available. + Details
Name: | us-gaap_FiniteLivedIntangibleAssetUsefulLife
Namespace Prefix: | us-gaap_
Data Type: | xbrli:durationItemType
Balance Type: | na
Period Type: | instant

X
- Definition The number of businesses acquired by the entity during the period. + References No definition available. + Details
Name: | us-gaap_NumberOfBusinessesAcquired
Namespace Prefix: | us-gaap_
Data Type: | xbrli:integerItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_StatementBusinessSegmentsAxis=cwst_MidAtlanticRegionMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MaximumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |