Bonus Payment

No definition available.

Name:	cnx_BonusPayment
Namespace Prefix:	cnx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Definition

% of bonus payment placed into escrow.

+ References

No definition available.

+ Details

Name:	cnx_BonusPaymentInEscrow
Namespace Prefix:	cnx_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

- Definition

Reimbursement From JV Partner

+ References

No definition available.

+ Details

Name:	cnx_ReimbursementFromJVPartner
Namespace Prefix:	cnx_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

This element represents the amount of any change recognized during the period in the high-end of the estimated range of outcomes (undiscounted) of a liability assumed in a business combination arising from an item of contingent consideration.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 805

-SubTopic 30

-Section 50

-Paragraph 4

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=7488404&loc=d3e7008-128479

+ Details

Name:	us-gaap_BusinessCombinationContingentConsiderationArrangementsChangeInTheRangeOfOutcomesContingentConsiderationLiabilityValueHigh
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

- Definition

Lease area in which a working interest is owned and on which wells have not been drilled or completed to a point that would permit the production of commercial quantities of oil and gas regardless of whether or not such area contains proved reserves.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Industry Guide

-Number 2

-Paragraph 5

+ Details

Name:	us-gaap_GasAndOilAreaUndevelopedGross
Namespace Prefix:	us-gaap_
Data Type:	num:areaItemType
Balance Type:	na
Period Type:	instant

- Definition

The cash outflow associated with the acquisition of long-lived, physical assets that are used in the normal conduct of business to produce goods and services and not intended for resale; includes cash outflows to pay for construction of self-constructed assets.

+ References

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Glossary Investing Activities

-URI http://asc.fasb.org/extlink&oid=6516133

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 13

-Subparagraph (c)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3213-108585

+ Details

Name:	us-gaap_PaymentsToAcquirePropertyPlantAndEquipment
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

Acquisitions (Details) (USD $)	6 Months Ended		3 Months Ended	6 Months Ended	3 Months Ended
Acquisitions (Details) (USD $)	Jun. 30, 2014	Jun. 30, 2013	Dec. 31, 2013 Dominion Acquisition Member	Jun. 30, 2014 Dominion Acquisition Member	Mar. 31, 2013 Allegheny County Airport – Allegheny County Airport [Member]	Mar. 31, 2013 Allegheny County Airport – Pittsburgh International Airport [Member] [Member] acre
Business Acquisition [Line Items]
Business Combination, Contingent Consideration Arrangements, Change in Range of Outcomes, Contingent Consideration, Liability, Value, High			$ 190,000,000
Reimbursement From JV Partner				0.50	0.50
Payments to Acquire Property, Plant, and Equipment	819,295,000	707,452,000	91,243,000	16,000,000
Gas and Oil Area, Undeveloped, Gross						9,300
Bonus Payment in Escrow					7.60%
Bonus Payment					$ 46,315,000