XML 71 R61.htm IDEA: XBRL DOCUMENT
v3.21.1

ACCUMULATED OTHER COMPREHENSIVE LOSS - Reclassified Out of Accumulated Other Comprehensive Loss (Details) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 USD ($)
Unrealized (Loss) Gain on Interest Rate Hedge |
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items] |
Interest expense, net of interest income | $ (2,448)

X
- Definition Interest Expense, Net + References No definition available. + Details
Name: | clh_InterestExpenseNet
Namespace Prefix: | clh_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
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 No definition available. + Details
Name: | us-gaap_ReclassificationAdjustmentOutOfAccumulatedOtherComprehensiveIncomeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Details
Name: | us-gaap_StatementEquityComponentsAxis=us-gaap_AccumulatedGainLossNetCashFlowHedgeParentMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |