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Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2014
Accounting Policies [Abstract]  
Property, Plant and Equipment [Table Text Block]
Depreciation is computed using the straight-line method over management’s estimated useful lives of the related assets, except for automotive equipment, which is depreciated using a declining-balance method. The estimated useful lives are as follows:
 
Years
Building and pipeline improvements
15-40
Pipelines and terminals
15-40
Asset retirement obligation assets
15-50
Other equipment
3-15
Property, plant and equipment, at cost, consist of the following (in thousands):

 
 
December 31,
 
 
2014
 
2013
 
 
 
 
 
Land and land improvements
 
$
2,000

 
$
1,931

Building and building improvements
 
1,169

 
1,057

Pipelines and terminals
 
266,196

 
229,672

Asset retirement obligations
 
2,073

 
1,999

Other equipment
 
3,764

 
2,959

Construction in process
 
18,323

 
26,454

 
 
293,525

 
264,072

Less: accumulated depreciation
 
(52,992
)
 
(39,566
)
 
 
$
240,533

 
$
224,506


Property, plant and equipment, accumulated depreciation and depreciation expense by reporting segment as of and for the years ended December 31, 2014 and 2013 are as follows (in thousands):
 
 
As of and For the Year Ended December 31, 2014
 
 
Pipelines and Transportation
 
Wholesale Marketing and Terminalling
 
Consolidated
Property, plant and equipment
 
$
227,927

 
$
65,598

 
$
293,525

Less: Accumulated depreciation
 
(36,459
)
 
(16,533
)
 
(52,992
)
Property, plant and equipment, net
 
$
191,468

 
$
49,065

 
$
240,533

Depreciation expense
 
$
10,395

 
$
3,247

 
$
13,642

    
 
 
As of and For the Year Ended December 31, 2013
 
 
Pipelines and Transportation
 
Wholesale Marketing and Terminalling
 
Consolidated
Property, plant and equipment
 
$
200,001

 
$
64,071

 
$
264,072

Less: Accumulated depreciation
 
(25,128
)
 
(14,438
)
 
(39,566
)
Property, plant and equipment, net
 
$
174,873

 
$
49,633

 
$
224,506

Depreciation expense
 
$
9,928

 
$
2,747

 
$
12,675
Schedule of Change in Asset Retirement Obligation [Table Text Block]
The reconciliation of the beginning and ending carrying amounts of asset retirement obligations as of December 31, 2014 and 2013 is as follows (in thousands):
 
 
December 31,
 
 
2014
 
2013
Beginning balance
 
$
3,087

 
$
3,263

Liabilities settled
 
—

 
(400
)
Accretion expense
 
232

 
224

Ending balance
 
$
3,319

 
$
3,087