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Property, Plant and Equipment (Tables)

12 Months Ended

Dec. 31, 2015

Property, Plant and Equipment [Abstract]

Summary of Property, Plant and Equipment

				December 31, 2015								December 31, 2014
(Thousands of dollars)		Estimated Useful Life		Cost				Net				Cost				Net
Land				$	555,198			$	555,198			$	527,158			$	527,158
Pipeline and terminal facilities		16 to 25 years		95,244				40,846				88,447				36,384
Retail gasoline stations		3 to 50 years		1,367,176				746,747				1,229,582				662,954
Buildings		20 to 45 years		19,441				8,985				18,160				8,328
Other		3 to 20 years		56,745				17,542				47,801				13,257
				$	2,093,804			$	1,369,318			$	1,911,148			$	1,248,081

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- References

No definition available.

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- Definition

Tabular disclosure of physical assets used in the normal conduct of business and not intended for resale. Includes, but is not limited to, balances by class of assets, depreciation and depletion expense and method used, including composite depreciation, and accumulated deprecation.

+ 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 b
-Article 5

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