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Business Segment Information (Tables) | 3 Months Ended
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Mar. 31, 2013
Segment Reporting Information [Line Items] |
Schedule of Segment Reporting Information, by Segment [Table Text Block] | Segment information for the periods presented below was as follows:
| Pipeline Transportation |  | Refinery Services |  | Supply & Logistics |  | Total
Three Months Ended March 31, 2013 |  |  |  |  |  |  |
Segment margin (a) | $ | 25,196 |  |  | $ | 17,965 |  |  | $ | 28,904 |  |  | $ | 72,065 |
Capital expenditures (b) | $ | 83,852 |  |  | $ | 352 |  |  | $ | 17,611 |  |  | $ | 101,815 |
Revenues: |  |  |  |  |  |  |
External customers | $ | 17,305 |  |  | $ | 52,179 |  |  | $ | 1,077,730 |  |  | $ | 1,147,214 |
Intersegment (c) | 3,474 |  |  | (2,695 | ) |  | (779 | ) |  | — |
Total revenues of reportable segments | $ | 20,779 |  |  | $ | 49,484 |  |  | $ | 1,076,951 |  |  | $ | 1,147,214 |
Three Months Ended March 31, 2012 |  |  |  |  |  |  |
Segment margin (a) | $ | 25,347 |  |  | $ | 17,249 |  |  | $ | 17,656 |  |  | $ | 60,252 |
Capital expenditures (b) | $ | 246,428 |  |  | $ | 910 |  |  | $ | 40,831 |  |  | $ | 288,169 |
Revenues: |  |  |  |  |  |  |
External customers | $ | 14,976 |  |  | $ | 50,373 |  |  | $ | 895,368 |  |  | $ | 960,717 |
Intersegment (c) | 4,433 |  |  | (2,328 | ) |  | (2,105 | ) |  | — |
Total revenues of reportable segments | $ | 19,409 |  |  | $ | 48,045 |  |  | $ | 893,263 |  |  | $ | 960,717 |
Total assets by reportable segment were as follows:
| March 31, 2013 |  | December 31, 2012
Pipeline transportation | $ | 964,906 |  |  | $ | 890,652 |
Refinery services | 415,088 |  |  | 414,170 |
Supply and logistics | 837,426 |  |  | 750,347 |
Other assets | 57,863 |  |  | 54,495 |
Total consolidated assets | $ | 2,275,283 |  |  | $ | 2,109,664 |
Reconciliation of Operating Profit (Loss) from Segments to Consolidated [Table Text Block] |
(a) | A reconciliation of Segment Margin to income before income taxes for the periods presented is as follows:
| Three Months Ended March 31,
| 2013 |  | 2012
Segment Margin | $ | 72,065 |  |  | $ | 60,252 |
Corporate general and administrative expenses | (10,837 | ) |  | (8,621 | )
Depreciation and amortization | (15,053 | ) |  | (14,779 | )
Interest expense | (11,441 | ) |  | (10,596 | )
Distributable cash from equity investees in excess of equity in earnings | (6,564 | ) |  | (6,733 | )
Non-cash items not included in segment margin | (4,295 | ) |  | 1,324 |
Cash payments from direct financing leases in excess of earnings | (1,232 | ) |  | (1,221 | )
Income before income taxes | $ | 22,643 |  |  | $ | 19,626 |
(b) | Capital expenditures include maintenance and growth capital expenditures, such as fixed asset additions (including enhancements to existing facilities and construction of internal growth projects) as well as acquisitions of businesses and interests in equity investees. Capital spending in our pipeline transportation segment included $64.5 million and $33.5 million during the three months ended March 31, 2013 and March 31, 2012, respectively, representing capital contributions to our SEKCO equity investee to fund our share of the construction costs for its pipeline. For the three months ended March 31, 2012, capital spending in our pipeline transportation segment also included $205.6 million for the acquisition of interests in several Gulf of Mexico pipelines.
(c) | Intersegment sales were conducted under terms that we believe were no more or less favorable than then-existing market conditions.

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- Definition Tabular disclosure of all significant reconciling items in the reconciliation of total profit or loss from reportable segments, to the entity's consolidated income before income taxes, extraordinary items, and discontinued operations. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 31 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8924-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 32 -Subparagraph b -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. + Details
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- Definition Tabular disclosure of the profit or loss and total assets for each reportable segment. An entity discloses certain information on each reportable segment if the amounts (a) are included in the measure of segment profit or loss reviewed by the chief operating decision maker or (b) are otherwise regularly provided to the chief operating decision maker, even if not included in that measure of segment profit or loss. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 22 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8736-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 25 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8813-108599 Reference 3: 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=14024403&loc=d3e13816-109267 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Statement of Financial Accounting Standard (FAS) -Number 131 -Paragraph 27, 28 -LegacyDoc This reference is SUPERSEDED by the Accounting Standards Codification effective for interim and annual periods ending after September 15, 2009. This reference is included to help users transition from the previous accounting hierarchy and will be removed from future versions of this taxonomy. Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 30 -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8906-108599 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 21 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6534315&loc=d3e8721-108599 + Details
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