v3.19.3.a.u2

GOODWILL (Tables) | 12 Months Ended
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Dec. 31, 2019
Goodwill and Intangible Assets Disclosure [Abstract] |
Schedule of Goodwill [Table Text Block] | Changes in the carrying amount of goodwill by segment were as follows:
| Pipeline |  | Storage |  | Total
| (Thousands of Dollars)
Balances as of January 1, 2018 | $ | 707,045 |  |  | $ | 301,622 |  |  | $ | 1,008,667 |
Activity for the year ended December 31, 2018: |  |  |  |  |
Navigator Acquisition purchase price allocation adjustments (Note 6) | (2,814 | ) |  | — |  |  | (2,814 | )
Balances as of December 31, 2018 and 2019 | $ | 704,231 |  |  | $ | 301,622 |  |  | $ | 1,005,853 |

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