XML 64 R52.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Commitments and Contingencies Additional Information (Details) - USD ($) $ in Thousands | Mar. 31, 2017 | Dec. 31, 2016
--- | --- | ---
Commitments and Contingencies Disclosure [Line Items] |  |
Loss Contingency, Range of Possible Loss, Portion Not Accrued | $ 549,758 |
Murray Energy [Member] |  |
Commitments and Contingencies Disclosure [Line Items] |  |
Contractual Obligation | $ 1,285 | $ 1,362

X
- Definition Commitments and Contingencies Disclosure [Line Items] + References No definition available. + Details
Name: | cnx_CommitmentsAndContingenciesDisclosureLineItems
Namespace Prefix: | cnx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Amount of contractual obligation, including but not limited to, long-term debt, capital lease obligations, operating lease obligations, purchase obligations, and other commitments. + References No definition available. + Details
Name: | us-gaap_ContractualObligation
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

X
- Definition The difference between the maximum amount of estimated loss and the amount recorded as of the balance sheet date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 450 -SubTopic 20 -Section 05 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=6395354&loc=d3e12631-108344 + Details
Name: | us-gaap_LossContingencyRangeOfPossibleLossPortionNotAccrued
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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