PARTNERS' EQUITY (Tables)
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3 Months Ended |
Mar. 31, 2016 |
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| Partners' Capital Notes [Abstract] |
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| Schedule of Changes in Partners' Equity |
The following table summarizes changes to our partners’ equity (in thousands of dollars): | | | | | Balance as of December 31, 2015 | $ | 1,609,844 |
| Net income | 57,401 |
| Unit-based compensation | 3,236 |
| Other comprehensive loss | (14,778 | ) | Cash distributions to partners | (98,051 | ) | Balance as of March 31, 2016 | $ | 1,557,652 |
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| Schedule of Accumulated Other Comprehensive Income (Loss) [Table Text Block] |
The balance of and changes in the components included in AOCI were as follows: | | | | | | | | | | | | | | | | | | Foreign Currency Translation | | Cash Flow Hedges | | Pension and Other Postretirement Benefits | | Total | | (Thousands of Dollars) | Balance as of January 1, 2016 | $ | (60,826 | ) | | $ | (27,968 | ) | | $ | — |
| | $ | (88,794 | ) | Other comprehensive income (loss): | | | | | | | | Employee Transfer | — |
| | — |
| | 4,201 |
| | 4,201 |
| Other comprehensive income (loss) before reclassification adjustments | 8,938 |
| | (29,978 | ) | | — |
| | (21,040 | ) | Net gain on pension costs reclassified into operating expense | — |
| | — |
| | (120 | ) | | (120 | ) | Net gain on pension costs reclassified into general and administrative expense | — |
| | — |
| | (41 | ) | | (41 | ) | Net loss on cash flow hedges reclassified into interest expense, net | — |
| | 2,222 |
| | — |
| | 2,222 |
| Other comprehensive income (loss) | 8,938 |
| | (27,756 | ) | | 4,040 |
| | (14,778 | ) | Balance as of March 31, 2016 | $ | (51,888 | ) | | $ | (55,724 | ) | | $ | 4,040 |
| | $ | (103,572 | ) |
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| Schedule of Calculation of Net Income Applicable to General Partner [Text Block] |
The following table details the calculation of net income applicable to the general partner: | | | | | | | | | | Three Months Ended March 31, | | 2016 | | 2015 | | (Thousands of Dollars) | Net income applicable to general partner and limited partners’ interest | $ | 57,401 |
| | $ | 127,899 |
| Less general partner incentive distribution | 10,805 |
| | 10,805 |
| Net income after general partner incentive distribution | 46,596 |
| | 117,094 |
| General partner interest | 2 | % | | 2 | % | General partner allocation of net income after general partner incentive distribution | 932 |
| | 2,342 |
| General partner incentive distribution | 10,805 |
| | 10,805 |
| Net income applicable to general partner | $ | 11,737 |
| | $ | 13,147 |
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| Schedule of Distributions To General and Limited Partners [Text Block] |
The following table reflects the allocation of total cash distributions to the general and limited partners applicable to the period in which the distributions were earned: | | | | | | | | | | Three Months Ended March 31, | | 2016 | | 2015 | | (Thousands of Dollars, Except Per Unit Data) | General partner interest | $ | 1,961 |
| | $ | 1,961 |
| General partner incentive distribution | 10,805 |
| | 10,805 |
| Total general partner distribution | 12,766 |
| | 12,766 |
| Limited partners’ distribution | 85,285 |
| | 85,285 |
| Total cash distributions | $ | 98,051 |
| | $ | 98,051 |
| | | | | Cash distributions per unit applicable to limited partners | $ | 1.095 |
| | $ | 1.095 |
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| Distributions Made to Limited and General Partners, by Distribution [Table Text Block] |
The following table summarizes information related to our quarterly cash distributions: | | | | | | | | | | | | | | Quarter Ended | | Cash Distributions Per Unit | | Total Cash Distributions | | Record Date | | Payment Date | | | | | (Thousands of Dollars) | | | | | March 31, 2016 (a) | | $ | 1.095 |
| | $ | 98,051 |
| | May 9, 2016 | | May 13, 2016 | December 31, 2015 | | $ | 1.095 |
| | $ | 98,051 |
| | February 8, 2016 | | February 12, 2016 |
| | (a) | The distribution was announced on April 27, 2016. |
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