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GOODWILL (Tables) | 12 Months Ended
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Dec. 31, 2015
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 |  | Fuels Marketing |  | Total
| (Thousands of Dollars)
Balances as of January 1, 2014 and December 31, 2014: |  |  |  |  |  |  |
Goodwill | $ | 306,207 |  |  | $ | 612,012 |  |  | $ | 53,255 |  |  | $ | 971,474 |
Accumulated impairment losses | — |  |  | (331,913 | ) |  | (22,132 | ) |  | (354,045 | )
Net goodwill | 306,207 |  |  | 280,099 |  |  | 31,123 |  |  | 617,429 |
Activity for the year ended December 31, 2015: |  |  |  |  |  |  |
Linden Acquisition final purchase price allocation | — |  |  | 79,208 |  |  | — |  |  | 79,208 |
Balances as of December 31, 2015: |  |  |  |  |  |  |
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 |

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- Definition Tabular disclosure of goodwill by reportable segment and in total which includes a rollforward schedule. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13816-109267 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 20 -Section 50 -Paragraph 2 -URI http://asc.fasb.org/extlink&oid=35741047&loc=d3e13854-109267 + Details
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