XML 54 R44.htm IDEA: XBRL DOCUMENT
v3.21.2

INVENTORIES AND SUPPLIES (Details) - USD ($) $ in Thousands | Sep. 30, 2021 | Dec. 31, 2020
--- | --- | ---
Inventory [Line Items] |  |
Inventories and supplies | $ 228,682 | $ 220,498
Oil and oil related products |  |
Inventory [Line Items] |  |
Inventories and supplies | 88,044 | 76,209
Supplies |  |
Inventory [Line Items] |  |
Inventories and supplies | 119,953 | 120,007
Solvent and solutions |  |
Inventory [Line Items] |  |
Inventories and supplies | 7,620 | 8,812
Other |  |
Inventory [Line Items] |  |
Inventories and supplies | $ 13,065 | $ 15,470

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_InventoryLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section 45 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=124098289&loc=d3e6676-107765 Reference 2: http://www.xbrl.org/2003/role/exampleRef -Publisher FASB -Name Accounting Standards Codification -Topic 852 -SubTopic 10 -Section 55 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=84165509&loc=d3e56426-112766 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.6(a)) -URI http://asc.fasb.org/extlink&oid=120391452&loc=d3e13212-122682 + Details
Name: | us-gaap_InventoryNet
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

X
- Details
Name: | us-gaap_PublicUtilitiesInventoryAxis=clh_OilAndOilRelatedProductsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesInventoryAxis=us-gaap_PublicUtilitiesInventorySuppliesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesInventoryAxis=clh_SolventAndSolutionsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PublicUtilitiesInventoryAxis=clh_OtherInventoriesMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |