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Business Segments
 12 Months Ended
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