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Segment Information Reconciliation of Segment Information, Total Assets (Details) - USD ($) $ in Thousands | Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
--- | --- | --- | ---
Items Excluded from Segment Assets: |  |  |
Segment Assets | $ 9,060,806 | $ 8,592,170 | $ 6,931,913
Recoverable Income Taxes | 62,425 | 149,481 |
Intercompany Eliminations |  |  |
Items Excluded from Segment Assets: |  |  |
Segment Assets | 6,331 | (12,223) |
Segment Reconciling Items |  |  |
Items Excluded from Segment Assets: |  |  |
Cash and Cash Equivalents | 16,283 | 17,198 |
Recoverable Income Taxes | 62,425 | 149,481 |
Exploration and Production Equipment | Operating Segments |  |  |
Items Excluded from Segment Assets: |  |  |
Segment Assets | 6,745,091 | 6,518,597 | $ 6,391,223
Midstream | Operating Segments |  |  |
Items Excluded from Segment Assets: |  |  |
Segment Assets | $ 2,230,676 | $ 1,919,117 |

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