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Property, Plant and Equipment, net (Tables)
 12 Months Ended
Dec. 31, 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 proppant storage solutions
5-15
Furniture and fixtures
3-10
Deferred mining 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 consists of:
 
December 31,
 
2018
 
2017
Machinery, equipment and tooling
$
14,858

 
$
7,802

Wellsite proppant storage solutions
5,286

 
—

Vehicles
1,955

 
1,546

Furniture and fixtures
1,140

 
720

Plant and building
158,882

 
81,561

Real estate properties
4,601

 
4,432

Railroad and sidings
27,347

 
10,254

Land and land improvements
27,167

 
16,378

Asset retirement obligation
16,469

 
8,408

Mineral properties
10,075

 
9,878

Deferred mining costs
1,806

 
657

Construction in progress
21,619

 
56,493

 
291,205

 
198,129

Less: accumulated depreciation and depletion
42,809

 
26,367

Total property, plant and equipment, net
$
248,396

 
$
171,762