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Segment Data (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2013 | Jun. 30, 2012 | Jun. 30, 2013 | Jun. 30, 2012 | Dec. 31, 2012
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales | $ 230,141 | $ 262,480 | $ 441,036 | $ 501,563 |
Cost of Goods Sold | 207,966 | 249,060 | 395,826 | 474,469 |
Operating expenses | 6,067 | 4,884 | 11,929 | 9,094 |
Segment Contribution Margin | 16,108 | 8,536 | 33,281 | 18,000 |
General and Administrative Expense | 1,111 | 2,346 | 2,788 | 4,753 |
Depreciation and amortization | 2,372 | 2,260 | 4,724 | 4,394 |
Gain on sale of assets | 0 | (5) | 0 | 0 |
Operating income | 12,625 | 3,935 | 25,769 | 8,853 |
Total assets | 258,822 | 236,806 | 258,822 | 236,806 | 245,769
Capital spending (excluding business combinations) | 1,053 | 1,190 | 2,329 | 2,203 |
Wholesale Marketing and Terminalling [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales | 216,475 | 255,679 | 413,771 | 488,083 |
Cost of Goods Sold | 207,966 | 249,060 | 395,826 | 474,469 |
Operating expenses | 1,340 | 1,069 | 2,581 | 2,001 |
Segment Contribution Margin | 7,169 | 5,550 | 15,364 | 11,613 |
Total assets | 101,980 | 125,592 | 101,980 | 125,592 |
Capital spending (excluding business combinations) | 688 | 475 | 836 | 1,112 |
Pipelines and Transportation [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Net sales | 13,666 | 6,801 | 27,265 | 13,480 |
Cost of Goods Sold | 0 | 0 | 0 | 0 |
Operating expenses | 4,727 | 3,815 | 9,348 | 7,093 |
Segment Contribution Margin | 8,939 | 2,986 | 17,917 | 6,387 |
Total assets | 156,842 | 111,214 | 156,842 | 111,214 |
Capital spending (excluding business combinations) | $ 365 | $ 715 | $ 1,493 | $ 1,091 |

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