Property, Plant And Equipment (Tables)

12 Months Ended

Dec. 31, 2013

Property, Plant And Equipment [Abstract]

Summary Of Property, Plant And Equipment

		December 31, 2013			December 31, 2012
(Thousands of dollars)	Estimated Useful Life		Cost	Net		Cost	Net
Land		$	520,026	520,026		446,385	446,385
Ethanol facilities	20 years		67,284	1,082		163,990	83,195
Pipeline and terminal facilities	16 to 25 years		85,907	36,114		83,484	35,347
Retail gasoline stations	3 to 20 years		1,110,340	611,132		1,029,608	594,377
Buildings	20 to 45 years		17,829	8,608		3,869	2,867
Other	3 to 20 years		44,697	13,761		33,192	7,789
		$	1,846,083	1,190,723		1,760,528	1,169,960