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CWP and Workers Comp - Net Periodic Costs (Tables) | 3 Months Ended
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Mar. 31, 2017
CWP And Workers Comp Net Periodic Cost [Abstract] |
Schedule Of Postemployment Benefits Disclosure [Text Block] | Components of Net Periodic Benefit Cost (Credit) are as follows:
| CWP |  | Workers' Compensation
| For the Three Months Ended March 31, |  | For the Three Months Ended March 31,
| 2017 |  | 2016 |  | 2017 |  | 2016
Service Cost | $ | 1,129 |  |  | $ | 1,204 |  |  | $ | 1,463 |  |  | $ | 1,904 |
Interest Cost | 1,013 |  |  | 1,123 |  |  | 592 |  |  | 638 |
Amortization of Actuarial Gain | (1,908 | ) |  | (1,383 | ) |  | (153 | ) |  | (101 | )
Administrative Fees | 151 |  |  | — |  |  | 138 |  |  | — |
State Administrative Fees and Insurance Bond Premiums | — |  |  | — |  |  | 799 |  |  | 731 |
Curtailment Gain | — |  |  | (1,307 | ) |  | — |  |  | — |
Net Periodic Benefit Cost (Credit) | $ | 385 |  |  | $ | (363 | ) |  | $ | 2,839 |  |  | $ | 3,172 |

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- Definition CWP and Workers Comp - Net Periodic Cost [Abstract] + References No definition available. + Details
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- Definition Schedule of Postemployment Benefits Disclosure [Text Block] + References No definition available. + Details
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Namespace Prefix: | cnx_
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Balance Type: | na
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