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Transactions with Related Parties (Tables) | 12 Months Ended
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Dec. 31, 2020
Related Party Transactions [Abstract] |
Schedule of Transactions With Related Parties | Transactions with related parties were as follows:
| Year Ended December 31,
| 2020 |  | 2019 |  | 2018
Revenues: |  |  |  |  |
Sales of CO 2 to Sandhill Group, LLC (1) | $ | — |  |  | $ | — |  |  | $ | 1,233 |
Revenues from services and fees to Poseidon Oil Pipeline Company, LLC (2) | 12,902 |  |  | 12,669 |  |  | 12,557 |
Revenues from product sales to ANSAC | 236,408 |  |  | 367,133 |  |  | 373,606 |
Expenses: |  |  |  |  |
Amounts paid to our CEO in connection with the use of his aircraft | $ | 660 |  |  | $ | 660 |  |  | $ | 660 |
Charges for products purchased from Poseidon Oil Pipeline Company, LLC (2) | 960 |  |  | 975 |  |  | 994 |
Charges for services from ANSAC | 2,460 |  |  | 4,446 |  |  | 5,284 |
(1) We owned a 50% interest in Sandhill Group, LLC which was sold in the third quarter of 2018. (2) We own a 64% interest in Poseidon Oil Pipeline Company, LLC. As of December 31, 2020 and 2019, our receivables from and payables to ANSAC were:
| December 31 |  | December 31
| 2020 |  | 2019
Receivables: |  |  |
ANSAC | $ | 43,400 |  |  | $ | 68,075 |
Payables: |  |  |
ANSAC | $ | 470 |  |  | $ | 2,103 |

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- Definition Tabular disclosure of related party transactions. Examples of related party transactions include, but are not limited to, transactions between (a) a parent company and its subsidiary; (b) subsidiaries of a common parent; (c) and entity and its principal owners and (d) affiliates. + References No definition available. + Details
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