XML 73 R60.htm IDEA: XBRL DOCUMENT
v3.21.1

Commitments and Contingent Liabilities - Amount of Commitment Expiration Per Period (Details) $ in Thousands | Mar. 31, 2021 USD ($)
--- | ---
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | $ 294,098
Less Than 1 Year |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 289,922
1-3 Years |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 4,176
3-5 Years |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Beyond 5 Years |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Letters of Credit | Firm Transportation |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 181,576
Letters of Credit | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 7,021
Letters of Credit | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 188,597
Letters of Credit | Less Than 1 Year | Firm Transportation |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 181,576
Letters of Credit | Less Than 1 Year | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 7,021
Letters of Credit | Less Than 1 Year | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 188,597
Letters of Credit | 1-3 Years | Firm Transportation |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Letters of Credit | 1-3 Years | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Letters of Credit | 1-3 Years | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Letters of Credit | 3-5 Years | Firm Transportation |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Letters of Credit | 3-5 Years | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Letters of Credit | 3-5 Years | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Letters of Credit | Beyond 5 Years | Firm Transportation |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Letters of Credit | Beyond 5 Years | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Letters of Credit | Beyond 5 Years | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 9,224
Surety Bond | Employee-Related |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 2,600
Surety Bond | Environmental |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 12,007
Surety Bond | Financial Guarantees |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 81,670
Surety Bond | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 105,501
Surety Bond | Less Than 1 Year | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 6,703
Surety Bond | Less Than 1 Year | Employee-Related |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 2,600
Surety Bond | Less Than 1 Year | Environmental |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 10,352
Surety Bond | Less Than 1 Year | Financial Guarantees |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 81,670
Surety Bond | Less Than 1 Year | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 101,325
Surety Bond | 1-3 Years | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 2,521
Surety Bond | 1-3 Years | Employee-Related |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | 1-3 Years | Environmental |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 1,655
Surety Bond | 1-3 Years | Financial Guarantees |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | 1-3 Years | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 4,176
Surety Bond | 3-5 Years | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | 3-5 Years | Employee-Related |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | 3-5 Years | Environmental |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | 3-5 Years | Financial Guarantees |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | 3-5 Years | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | Beyond 5 Years | Other |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | Beyond 5 Years | Employee-Related |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | Beyond 5 Years | Environmental |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | Beyond 5 Years | Financial Guarantees |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | 0
Surety Bond | Beyond 5 Years | Loss Contingencies by Secondary Nature of Contingency |
Schedule of Costs Related to Purchase Obligations [Line Items] |
Guarantor obligations, maximum exposure | $ 0

X
- Definition Schedule of Costs Related to Purchase Obligations [Line Items] + References No definition available. + Details
Name: | cnx_ScheduleOfCostsRelatedToPurchaseObligationsLineItems
Namespace Prefix: | cnx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Maximum potential amount of future payments (undiscounted) the guarantor could be required to make under the guarantee or each group of similar guarantees before reduction for potential recoveries under recourse or collateralization provisions. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 460 -SubTopic 10 -Section 50 -Paragraph 4 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121555522&loc=d3e12069-110248 + Details
Name: | us-gaap_GuaranteeObligationsMaximumExposure
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Details
Name: | us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=cnx_BalanceOnFirstAnniversaryMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=cnx_MoreThanOneAndWithinThreeYearsFromBalanceSheetDateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=cnx_MoreThanThreeAndWithinFiveYearsFromBalanceSheetDateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_PurchaseCommitmentExcludingLongtermCommitmentAxis=cnx_BeyondFiveYearsOfBalanceSheetDateMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_StandbyLettersOfCreditMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=cnx_FirmTransportationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=cnx_OtherCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=cnx_LossContingenciesbySecondaryNatureofContingencyMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_LossContingenciesByNatureOfContingencyAxis=us-gaap_SuretyBondMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=cnx_EmployeeRelatedCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=cnx_EnvironmentRelatedCommitmentsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_OtherCommitmentsAxis=us-gaap_FinancialGuaranteeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |