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Summary of Significant Accounting Policies (Tables)
 12 Months Ended
Dec. 31, 2018
Property, Plant and Equipment [Line Items]  
Schedule of New Accounting Pronouncements and Changes in Accounting Principles [Table Text Block] The impacts of adoption to the current period results are as follows (in thousands):
 
December 31, 2018
 
Under ASC 606
 
Under ASC 605
 
Increase/(Decrease)
Accounts receivable, net
$
562,214

 
$
562,057

 
$
157

Other noncurrent assets
$
140,807

 
$
119,911

 
$
20,896

Other current liabilities
$
6,495

 
$
6,538

 
$
(43
)
Deferred income taxes
$
55,789

 
$
50,045

 
$
5,744

Accumulated deficit
$
(73,971
)
 
$
(89,324
)
 
$
15,353

 
Year Ended December 31, 2018
 
Under ASC 606
 
Under ASC 605
 
Increase/(Decrease)
Revenue
$
2,503,262

 
$
2,483,962

 
$
19,300

Cost of sales
$
1,823,095

 
$
1,808,129

 
$
14,966

General and administrative expense
$
91,568

 
$
91,168

 
$
400

Income tax benefit
$
23,304

 
$
23,209

 
$
95

Net loss
$
(24,328
)
 
$
(28,167
)
 
$
3,839


Net loss attributable to common shareholders
$
(50,539
)
 
$
(54,378
)
 
$
3,839

Net loss per common share:
 
 
 
 

Basic
$
(0.65
)
 
$
(0.70
)
 
$
0.05

Diluted
$
(0.65
)
 
$
(0.70
)
 
$
0.05
Property, Plant and Equipment [Table Text Block] Depreciation is calculated primarily using the straight-line method over the following estimated useful lives:
Pipelines and related facilities
10 – 31 years
Storage and terminal facilities
10 – 25 years
Natural gas gathering and processing facilities
10 – 31 years
Trucking equipment and other
3 – 7 years
Office property and equipment
3 – 31 years
Property, plant and equipment consists of the following (in thousands):
 
December 31,
 
2018
 
2017
Land
$
308,166

 
$
273,168

Pipelines and related facilities
1,023,502

 
926,799

Storage and terminal facilities
1,247,115

 
1,111,001

Natural gas gathering and processing facilities
1,055,305

 
940,130

Linefill
27,972

 
25,747

Trucking equipment and other
45,567

 
45,162

Office property and equipment
69,498

 
63,052

Construction-in-progress
288,104

 
374,914

Property, plant and equipment, gross
4,065,229

 
3,759,973

Accumulated depreciation
(607,903
)
 
(444,842
)
Property, plant and equipment, net
$
3,457,326

 
$
3,315,131