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Property, Plant and Equipment (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2015 | Dec. 31, 2014
Property, Plant and Equipment [Line Items] |  |
Cost | $ 2,093,804 | $ 1,911,148
Net | 1,369,318 | 1,248,081
Land [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Cost | 555,198 | 527,158
Net | 555,198 | 527,158
Pipeline And Terminal Facilities [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Cost | 95,244 | 88,447
Net | 40,846 | 36,384
Retail Gasoline Stations [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Cost | 1,367,176 | 1,229,582
Net | 746,747 | 662,954
Buildings [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Cost | 19,441 | 18,160
Net | 8,985 | 8,328
Other [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Cost | 56,745 | 47,801
Net | $ 17,542 | $ 13,257
Minimum [Member] | Pipeline And Terminal Facilities [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life (in years) | 16 years |
Minimum [Member] | Retail Gasoline Stations [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life (in years) | 3 years |
Minimum [Member] | Buildings [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life (in years) | 20 years |
Minimum [Member] | Other [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life (in years) | 3 years |
Maximum [Member] | Pipeline And Terminal Facilities [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life (in years) | 25 years |
Maximum [Member] | Retail Gasoline Stations [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life (in years) | 50 years |
Maximum [Member] | Buildings [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life (in years) | 45 years |
Maximum [Member] | Other [Member] |  |
Property, Plant and Equipment [Line Items] |  |
Estimated useful life (in years) | 20 years |

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- Definition Amount before accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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- Definition Amount after accumulated depreciation, depletion and amortization of physical assets used in the normal conduct of business to produce goods and services and not intended for resale. Examples include, but are not limited to, land, buildings, machinery and equipment, office equipment, and furniture and fixtures. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.13) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 Reference 2: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 360 -SubTopic 10 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=6391035&loc=d3e2868-110229 Reference 3: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 02 -Paragraph 13 -Subparagraph a -Article 5 Reference 4: http://www.xbrl.org/2003/role/presentationRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 03 -Paragraph 8 -Article 7 + Details
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- Definition Useful life of long lived, physical assets used in the normal conduct of business and not intended for resale, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. Examples include, but not limited to, land, buildings, machinery and equipment, office equipment, furniture and fixtures, and computer equipment. + References No definition available. + Details
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