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Business Segments | 12 Months Ended
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Dec. 31, 2015
Segment Reporting [Abstract] |
Business Segments | Business Segments Our operations include the sale of retail motor fuel products and convenience merchandise along with the wholesale and bulk sale capabilities of our product supply and wholesale group. As the primary purpose of the product supply and wholesale group is to support our retail operations and provide fuel for their daily operation, the bulk and wholesale fuel sales are secondary to the support functions played by these groups. As such, they are all treated as one segment for reporting purposes as they sell the same products. This Marketing segment contains essentially all of the revenue generating activities of the Company. Results not included in the reportable segment include Corporate and Other Assets and Discontinued Operations. The reportable segment was determined based on information reviewed by the Chief Operating Decision Maker (CODM).
Segment Information |  |  |  | Corporate and |  | Discontinued |  |
(Thousands of dollars) |  | Marketing |  | Other Assets |  | Operations |  | Consolidated
Year ended December 31, 2015 |  |  |  |  |  |  |  |
Segment income (loss) |  | $ | 159,796 |  |  | (22,205 | ) |  | 38,749 |  |  | $ | 176,340 |
Revenues from external customers |  | 12,699,125 |  |  | 286 |  |  | — |  |  | 12,699,411 |
Interest income |  | — |  |  | 2,177 |  |  | — |  |  | 2,177 |
Interest expense |  | (20 | ) |  | (33,511 | ) |  | — |  |  | (33,531 | )
Income tax expense (benefit) |  | 95,657 |  |  | (14,959 | ) |  | — |  |  | 80,698 |
Significant noncash charges (credits) |  |  |  |  |  |  |  |  |  |  |  |
Depreciation and amortization |  | 81,349 |  |  | 5,219 |  |  | — |  |  | 86,568 |
Accretion of asset retirement obligations |  | 1,521 |  |  | — |  |  | — |  |  | 1,521 |
Deferred and noncurrent income taxes (benefits) |  | 42,593 |  |  | (2,037 | ) |  | — |  |  | 40,556 |
Additions to property, plant and equipment |  | 202,371 |  |  | 9,477 |  |  | 3,720 |  |  | 215,568 |
Total assets at year-end |  | $ | 1,727,131 |  |  | 159,110 |  |  | — |  |  | $ | 1,886,241 |
Segment Information |  |  | Corporate and |  | Discontinued |  |
(Thousands of dollars) | Marketing |  | Other Assets |  | Operations |  | Consolidated
Year ended December 31, 2014 |  |  |  |  |  |  |  |  |  |  |
Segment income (loss) | $ | 242,434 |  |  | (19,474 | ) |  | 20,903 |  |  | $ | 243,863 |
Revenues from external customers | 16,985,903 |  |  | 111 |  |  | — |  |  | 16,986,014 |
Interest income | — |  |  | 244 |  |  | — |  |  | 244 |
Interest expense | — |  |  | (36,646 | ) |  | — |  |  | (36,646 | )
Income tax expense (benefit) | 127,657 |  |  | (11,271 | ) |  | — |  |  | 116,386 |
Significant noncash charges (credits) |  |  |  |  |  |  |  |  |  |
Depreciation and amortization | 74,906 |  |  | 4,181 |  |  | — |  |  | 79,087 |
Accretion of asset retirement obligations | 1,200 |  |  | — |  |  | — |  |  | 1,200 |
Deferred and noncurrent income taxes (benefits) | 368 |  |  | (4,771 | ) |  | — |  |  | (4,403 | )
Additions to property, plant and equipment | 131,139 |  |  | 4,200 |  |  | 3,549 |  |  | 138,888 |
Total assets at year-end | $ | 1,544,018 |  |  | 348,991 |  |  | 56,328 |  |  | $ | 1,949,337 |
Year ended December 31, 2013 |  |  |  |  |  |  |  |  |  |  |
Segment income (loss) | $ | 164,013 |  |  | (9,878 | ) |  | 80,898 |  |  | $ | 235,033 |
Revenues from external customers | 17,814,081 |  |  | — |  |  | — |  |  | 17,814,081 |
Interest income | — |  |  | 1,099 |  |  | — |  |  | 1,099 |
Interest expense | — |  |  | (14,509 | ) |  | — |  |  | (14,509 | )
Income tax expense (benefit) | 106,223 |  |  | (6,164 | ) |  | — |  |  | 100,059 |
Significant noncash charges (credits) |  |  |  |  |  |  |  |  |  |
Depreciation and amortization | 71,253 |  |  | 2,800 |  |  | — |  |  | 74,053 |
Accretion of asset retirement obligations | 1,096 |  |  | — |  |  | — |  |  | 1,096 |
Deferred and noncurrent income taxes (benefits) | (9,796 | ) |  | (1,772 | ) |  | — |  |  | (11,568 | )
Additions to property, plant and equipment | 162,051 |  |  | 8,169 |  |  | 1,752 |  |  | 171,972 |
Total assets at year-end | $ | 1,527,125 |  |  | 320,281 |  |  | 41,158 |  |  | $ | 1,888,564 |

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- Definition The entire disclosure for reporting segments including data and tables. Reportable segments include those that meet any of the following quantitative thresholds a) it's reported revenue, including sales to external customers and intersegment sales or transfers is 10 percent or more of the combined revenue, internal and external, of all operating segments b) the absolute amount of its reported profit or loss is 10 percent or more of the greater, in absolute amount of 1) the combined reported profit of all operating segments that did not report a loss or 2) the combined reported loss of all operating segments that did report a loss c) its assets are 10 percent or more of the combined assets of all operating segments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 34 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8981-108599 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 41 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9038-108599 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 33 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8971-108599 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 12 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8595-108599 Reference 5: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8380-108599 Reference 6: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 32 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8933-108599 Reference 7: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 26 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8844-108599 Reference 8: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 35 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8984-108599 Reference 9: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 40 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9031-108599 Reference 10: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 42 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e9054-108599 Reference 11: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 10 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8538-108599 Reference 12: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 280 -SubTopic 10 -Section 50 -Paragraph 29 -URI http://asc.fasb.org/extlink&oid=51669610&loc=d3e8864-108599 Reference 13: 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=51669610&loc=d3e8924-108599 Reference 14: 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=51669610&loc=d3e8906-108599 + Details
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