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Property, Plant and Equipment, net (Tables)
9 Months Ended
Sep. 30, 2018
Property, Plant and Equipment [Abstract]  
Schedule of net property, plant and equipment
Depreciation is calculated using the straight-line method over the estimated useful lives of the property, plant and equipment, which are:
 
Years
Land improvements
10
Plant and buildings
5-15
Real estate properties
10-40
Railroad and sidings
30
Vehicles
3-5
Machinery, equipment and tooling
3-15
Wellsite storage solutions
5-15
Furniture and fixtures
3-10
Deferred stripping costs
3
The acquisition cost has been allocated over the assets as set forth below.
Machinery, equipment and tooling
$
1,478

Plant and building
1,407

Railroad and sidings
9,926

Land improvements
2,738

Total assets acquired
$
15,549

Net property, plant and equipment consisted of:
 
September 30, 2018
 
December 31, 2017
Machinery, equipment and tooling
$
11,179

 
$
7,802

Wellsite storage solutions
307

 

Vehicles
1,735

 
1,546

Furniture and fixtures
837

 
720

Plant and building
147,642

 
81,561

Real estate properties
4,441

 
4,432

Railroad and sidings
25,691

 
10,254

Land and land improvements
24,981

 
16,378

Asset retirement obligation
10,484

 
8,408

Mineral properties
10,074

 
9,878

Deferred mining costs
782

 
657

Construction in progress
32,363

 
56,493

 
270,516

 
198,129

Less: accumulated depreciation and depletion
37,335

 
26,367

Total property, plant and equipment, net
$
233,181

 
$
171,762