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Intangible Assets (Tables) | 3 Months Ended
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Mar. 31, 2013
Intangible Assets, Net (Excluding Goodwill) [Abstract] |
Schedule Of Components Of Intangible Assets | The following table summarizes the components of our intangible assets at the dates indicated:
| March 31, 2013 |  | December 31, 2012
| Gross Carrying Amount |  | Accumulated Amortization |  | Carrying Value |  | Gross Carrying Amount |  | Accumulated Amortization |  | Carrying Value
Refinery Services: |  |  |  |  |  |  |  |  |  |  |
Customer relationships | $ | 94,654 |  |  | $ | 70,946 |  |  | $ | 23,708 |  |  | $ | 94,654 |  |  | $ | 69,167 |  |  | $ | 25,487 |
Licensing agreements | 38,678 |  |  | 23,683 |  |  | 14,995 |  |  | 38,678 |  |  | 22,892 |  |  | 15,786 |
Supplier relationships | — |  |  | — |  |  | — |  |  | 36,469 |  |  | 36,469 |  |  | — |
Segment total | 133,332 |  |  | 94,629 |  |  | 38,703 |  |  | 169,801 |  |  | 128,528 |  |  | 41,273 |
Supply & Logistics: |  |  |  |  |  |  |  |  |  |  |
Customer relationships | 35,430 |  |  | 26,944 |  |  | 8,486 |  |  | 35,430 |  |  | 26,403 |  |  | 9,027 |
Intangibles associated with lease | 13,260 |  |  | 2,683 |  |  | 10,577 |  |  | 13,260 |  |  | 2,565 |  |  | 10,695 |
Trade names | — |  |  | — |  |  | — |  |  | 18,888 |  |  | 18,888 |  |  | — |
Segment total | 48,690 |  |  | 29,627 |  |  | 19,063 |  |  | 67,578 |  |  | 47,856 |  |  | 19,722 |
Other | 19,716 |  |  | 5,260 |  |  | 14,456 |  |  | 18,932 |  |  | 4,862 |  |  | 14,070 |
Total | $ | 201,738 |  |  | $ | 129,516 |  |  | $ | 72,222 |  |  | $ | 256,311 |  |  | $ | 181,246 |  |  | $ | 75,065 |
Amortization Expense | Our amortization expense for the periods presented was as follows:
| Three Months Ended March 31,
| 2013 |  | 2012
Amortization expense | $ | 3,627 |  |  | $ | 5,515 |
Schedule of Expected Amortization Expense | We estimate that our amortization expense for the next five years will be as follows:
Remainder of | 2013 | $ | 10,929 |
| 2014 | $ | 12,422 |
| 2015 | $ | 10,614 |
| 2016 | $ | 9,152 |
| 2017 | $ | 7,989 |

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- Definition Tabular disclosure of the estimated aggregate amortization expense for intangible assets subject to amortization for each of the five succeeding fiscal years. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 2 -Subparagraph (a) -URI http://asc.fasb.org/extlink&oid=7658586&loc=d3e16323-109275 + Details
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