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Property and Equipment (Tables)
6 Months Ended
Jun. 30, 2018
Property, Plant and Equipment [Abstract]  
Summary of Property and Equipment
Property and equipment are summarized as follows (amounts in thousands): 
 
 
June 30,
2018
 
December 31,
2017
Construction equipment
 
$
120,857

 
$
118,868

Transportation equipment
 
17,758

 
17,511

Buildings
 
9,738

 
9,577

Office equipment
 
2,706

 
3,339

Leasehold Improvement
 
914

 
914

Construction in progress
 
279

 
258

Land
 
2,348

 
2,348

Water rights
 

 
200

 
 
154,600

 
153,015

Less accumulated depreciation
 
(102,874
)
 
(98,609
)
Total property and equipment, net
 
$
51,726

 
$
54,406