XML 40 R28.htm IDEA: XBRL DOCUMENT
v3.7.0.1

Pension and OPEB - Periodic Cost (Tables) | 3 Months Ended
--- | ---
Mar. 31, 2017
PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS NET PERIODIC BENEFIT COSTS: [Abstract] |
Components of Net Periodic Costs | Components of Net Periodic Benefit (Credit) Cost are as follows:
| Pension Benefits |  | Other Post-Employment Benefits
| For the Three Months Ended March 31, |  | For the Three Months Ended March 31,
| 2017 |  | 2016 |  | 2017 |  | 2016
Service Cost | $ | 846 |  |  | $ | 482 |  |  | $ | — |  |  | $ | — |
Interest Cost | 6,428 |  |  | 6,841 |  |  | 5,986 |  |  | 6,060 |
Expected Return on Plan Assets | (10,596 | ) |  | (11,869 | ) |  | — |  |  | — |
Amortization of Prior Service Credits | (148 | ) |  | (147 | ) |  | (601 | ) |  | — |
Recognized Net Actuarial Loss | 2,351 |  |  | 2,116 |  |  | 5,778 |  |  | 4,792 |
Net Periodic Benefit (Credit) Cost | $ | (1,119 | ) |  | $ | (2,577 | ) |  | $ | 11,163 |  |  | $ | 10,852 |

X
- Definition PENSION AND OTHER POSTRETIREMENT BENEFIT PLANS NET PERIODIC BENEFIT COSTS: [Abstract] + References No definition available. + Details
Name: | cnx_PensionAndOtherPostretirementBenefitPlansNetPeriodicBenefitCostsAbstract
Namespace Prefix: | cnx_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of one or more of the entity's defined benefit pension plans or one or more other defined benefit postretirement plans, separately for pension plans and other postretirement benefit plans including the entity's schedule of fair value of plan assets for defined benefit or other postretirement plans. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 4 -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2439-114920 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 3 -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2417-114920 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e2410-114920 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 55 -Paragraph 17 -URI http://asc.fasb.org/extlink&oid=58242635&loc=d3e4179-114921 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=58740216&loc=d3e1928-114920 + Details
Name: | us-gaap_ScheduleOfDefinedBenefitPlansDisclosuresTextBlock
Namespace Prefix: | us-gaap_
Data Type: | nonnum:textBlockItemType
Balance Type: | na
Period Type: | duration