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Goodwill and Other Intangible Assets | 12 Months Ended
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Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Goodwill and Other Intangible Assets | GOODWILL AND OTHER INTANGIBLE ASSETS: In connection with the Midstream Acquisition that closed on January 3, 2018 (See Note 6 - Acquisitions and Dispositions for more information), CNX recorded $796,359 of goodwill and $128,781 of other intangible assets which are comprised of customer relationships. All goodwill is attributed to the Midstream reportable segment. The carrying amount and accumulated amortization of other intangible assets consist of the following:
| December 31,
| 2019 |  | 2018
Other Intangible Assets |  |  |
Gross Amortizable Asset - Customer Relationships | $ | 109,752 |  |  | $ | 109,752 |
Less: Accumulated Amortization - Customer Relationships | 13,105 |  |  | 6,552 |
Total Other Intangible Assets, net | $ | 96,647 |  |  | $ | 103,200 |
During the year ended December 31, 2018, CNX determined that the carrying value of a portion of the customer relationship intangible assets exceeded their fair value as a result of the AEA with HG Energy. Accordingly, CNX recognized an impairment on this intangible asset of $18,650. There were no such impairments in the current period. The customer relationship intangible asset is being amortized on a straight-line basis over approximately 17 years. Amortization expense related to other intangible assets was $6,553 and $6,931 for the years ended December 31, 2019 and 2018, respectively. There was no such expense for the year ended December 31, 2017. The estimated annual amortization expense is expected to approximate $6,552 per year for each of the next five years.

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- Definition The entire disclosure for goodwill and intangible assets. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -URI http://asc.fasb.org/topic&trid=2144416 + Details
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