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Segment Information (Tables)
 6 Months Ended
Jun. 30, 2019
Segment Reporting [Abstract]  
Schedule of Segment Reporting
Segment information for the periods presented is provided as follows:

 
Three months ended
 
Six months ended
 
June 30, 2019
June 30, 2018
 
June 30, 2019
June 30, 2018
Marine
 
 
 
 
 
         Contract revenues
$
89,023

$
80,698

 
$
150,510

$
143,489

         Operating income (loss)
9

3,642

 
(6,447
)
9,907

         Depreciation and amortization expense
(5,069
)
(5,295
)
 
(10,015
)
(10,026
)
 
 
 
 
 
 
         Total assets
$
236,917

$
268,642

 
$
236,917

$
268,642

         Property, plant and equipment, net
117,262

128,047

 
117,262

128,047

 
 
 
 
 
 
Concrete
 
 
 
 
 
        Contract revenues
$
76,962

$
79,069

 
$
158,580

$
153,121

        Operating (loss) income
(432
)
949

 
(153
)
1,753

        Depreciation and amortization expense
(2,153
)
(2,136
)
 
(4,247
)
(4,185
)
 
 
 
 
 
 
        Total assets
$
125,872

$
163,627

 
$
125,872

$
163,627

        Property, plant and equipment, net
17,783

19,636

 
17,783

19,636