v3.8.0.1

GOODWILL | 12 Months Ended
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Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract] |
GOODWILL | GOODWILL Changes in the carrying amount of goodwill by segment were as follows:
| Pipeline |  | Storage |  | Fuels Marketing |  | Total
| (Thousands of Dollars)
Balances as of January 1, 2016 and December 31, 2016: |  |  |  |  |  |  |
Goodwill | $ | 306,207 |  |  | $ | 691,220 |  |  | $ | 53,255 |  |  | $ | 1,050,682 |
Accumulated impairment losses | — |  |  | (331,913 | ) |  | (22,132 | ) |  | (354,045 | )
Net goodwill | 306,207 |  |  | 359,307 |  |  | 31,123 |  |  | 696,637 |
Activity for the year ended December 31, 2017: |  |  |  |  |  |  |
Navigator Acquisition preliminary purchase price allocation (a) | 400,838 |  |  | — |  |  | — |  |  | 400,838 |
Balances as of December 31, 2017: |  |  |  |  |  |  |
Goodwill | 707,045 |  |  | 691,220 |  |  | 53,255 |  |  | 1,451,520 |
Accumulated impairment losses | — |  |  | (331,913 | ) |  | (22,132 | ) |  | (354,045 | )
Net goodwill | $ | 707,045 |  |  | $ | 359,307 |  |  | $ | 31,123 |  |  | $ | 1,097,475 |
(a) | See Note 4 for discussion of the Navigator Acquisition.

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- Definition The entire disclosure for goodwill. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -URI http://asc.fasb.org/subtopic&trid=2144439 + Details
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