Property, Plant and Equipment (Tables)
 12 Months Ended
Dec. 31, 2015
Property, Plant and Equipment [Abstract]  
Property, Plant and Equipment
Property, plant and equipment, which are used to secure debt or are subject to lien, at cost, as of December 31, 2015 and 2014 were as follows (in thousands):
 
 
 
December 31,
 
 
2015
 
2014
Construction equipment
 
$
61,924

 
$
86,174

Furniture and equipment
 
31,921

 
38,477

Land and buildings
 
1,725

 
8,664

Transportation equipment
 
75,395

 
98,185

Leasehold improvements
 
6,725

 
9,354

Marine equipment
 
82

 
82

Total property, plant and equipment
 
177,772

 
240,936

Less: accumulated depreciation
 
(127,420
)
 
(155,287
)
Total property, plant and equipment, net
 
$
50,352

 
$
85,649