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Segment Data (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2014 | Jun. 30, 2013 | Jun. 30, 2014 | Jun. 30, 2013 | Dec. 31, 2013
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Net sales | $ 236,343 | $ 230,142 | [1] | $ 439,870 |  | $ 441,036 | [1] |  |
Operating costs and expenses: |  |  |  |  |  |  |  |  |
Cost of goods sold | 196,574 | 207,966 | [1] | 368,783 |  | 395,826 | [1] |  |
Operating expenses | 9,544 | 9,928 | [1] | 18,863 |  | 19,009 | [1] |  |
Segment contribution margin | 30,225 | 12,248 |  | 52,224 |  | 26,201 |  |  |
General and administrative expenses | 2,242 | 1,521 | [1] | 4,905 |  | 3,723 | [1] |  |
Depreciation and amortization | 3,532 | 3,284 | [1] | 7,009 |  | 6,825 | [1],[2] |  |
Loss on asset disposals | 74 | 0 | [1] | 74 |  | 0 | [1],[2] |  |
Operating income | 24,377 | 7,443 | [1] | 40,236 |  | 15,653 | [1] |  |
Total assets | 314,439 |  |  | 314,439 |  |  |  | 301,344 | [3]
Capital spending (excluding business combinations) | 968 | 3,425 | [4] | 1,933 | [5] | 7,139 | [2],[4] |  |
Pipelines and Transportation [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Net sales | 23,066 | 13,667 |  | 43,334 |  | 27,204 |  |  |
Operating costs and expenses: |  |  |  |  |  |  |  |  |
Cost of goods sold | 1,130 | 0 |  | 2,256 |  | 0 |  |  |
Operating expenses | 7,745 | 8,064 |  | 14,744 |  | 15,478 |  |  |
Segment contribution margin | 14,191 | 5,603 |  | 26,334 |  | 11,726 |  |  |
Total assets | 222,115 |  |  | 222,115 |  |  |  |  |
Capital spending (excluding business combinations) | 212 | 2,542 | [4] | 1,149 | [5] | 6,058 | [4] |  |
Wholesale Marketing and Terminalling [Member] |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |
Net sales | 213,277 | 216,475 |  | 396,536 |  | 413,832 |  |  |
Operating costs and expenses: |  |  |  |  |  |  |  |  |
Cost of goods sold | 195,444 | 207,966 |  | 366,527 |  | 395,826 |  |  |
Operating expenses | 1,799 | 1,864 |  | 4,119 |  | 3,531 |  |  |
Segment contribution margin | 16,034 | 6,645 |  | 25,890 |  | 14,475 |  |  |
Total assets | 92,324 |  |  | 92,324 |  |  |  |  |
Capital spending (excluding business combinations) | $ 756 | $ 883 | [4] | $ 784 | [5] | $ 1,081 | [4] |  |
[1] | Adjusted to include the historical results of the El Dorado Terminal and Tank Assets and the Tyler Terminal and Tank Assets. See Notes 1 and 2 for further discussion.
[2] | Adjusted to include the historical cash flows of the El Dorado Terminal and Tank Assets and the Tyler Terminal and Tank Assets. See Notes 1 and 2 for further discussion.
[3] | Includes the historical balances of the El Dorado Terminal and Tank Assets and the Tyler Terminal and Tank Assets. See Notes 1 and 2 for further discussion.
[4] | Capital spending includes expenditures incurred in connection with the assets acquired in the El Dorado Acquisition and the Tyler Acquisition.
[5] | Capital spending includes expenditures incurred in connection with the assets acquired in the El Dorado Acquisition.

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