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Revenue from Contract with Customer (Tables) | 6 Months Ended
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Jun. 30, 2021
Revenue from Contract with Customer [Abstract] |
Disaggregation of Revenue | The following table provides information about disaggregated revenue by type of product and contract for the three and six months ended June 30, 2021 and 2020:
| For the Three Months Ended June 30, |  | For the Six Months Ended June 30,
| 2021 |  | 2020 |  | 2021 |  | 2020
| (Dollars in thousands)
Graphite Electrodes - Three-to-five-year take-or-pay contracts | $ | 253,589 |  |  | $ | 245,010 |  |  | $ | 499,154 |  |  | $ | 521,389 |
Graphite Electrodes - Short-term agreements and spot sales | 65,204 |  |  | 30,111 |  |  | 112,459 |  |  | 60,929 |
By-products and other | 11,957 |  |  | 5,597 |  |  | 23,534 |  |  | 17,046 |
Total Revenues | $ | 330,750 |  |  | $ | 280,718 |  |  | $ | 635,147 |  |  | $ | 599,364 |
Revenue, Remaining Performance Obligation, Expected Timing of Satisfaction | The remaining revenue associated with our LTAs is expected to be approximately as follows:
|  |  | 2022 |  | 2023 through 2024
|  |  | (Dollars in millions)
Estimated LTA revenue |  |  | $910-$1,010 |  | $350-$450(1)
(1) Includes expected termination fees from a few customers that have failed to meet certain obligations under their LTAs.

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- Definition Tabular disclosure of disaggregation of revenue into categories depicting how nature, amount, timing, and uncertainty of revenue and cash flows are affected by economic factor. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 5 -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130545-203045 + Details
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- Definition Tabular disclosure of expected timing for satisfying remaining performance obligation. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 606 -SubTopic 10 -Section 50 -Paragraph 13 -Subparagraph (b)(1) -URI http://asc.fasb.org/extlink&oid=121604090&loc=SL49130556-203045 + Details
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