Revenue (Tables)

6 Months Ended

Jun. 30, 2018

Revenue from Contract with Customer [Abstract]

Disaggregation of Revenue

The following table represents a disaggregation of the Company’s contract revenues by service line for the marine and concrete segments:

	Three Months Ended June 30, 2018		Six Months Ended June 30, 2018
Marine Segment
Construction	$	52,860	$	95,235
Dredging	23,472		40,483
Specialty Services	4,366		7,771
Marine segment contract revenues	$	80,698	$	143,489
Concrete Segment
Light Commercial	$	62,189	$	118,682
Structural	16,740		34,112
Other	140		327
Concrete segment contract revenues	$	79,069	$	153,121
Total contract revenues	$	159,767	$	296,610