Segment Information (Tables)

9 Months Ended

Sep. 30, 2020

Segment Reporting [Abstract]

Schedule of segment reporting

	Three months ended				Nine months ended
	September 30,				September 30,
		2020		2019		2020		2019
Marine
Contract revenues	$	112,881	$	107,404	$	290,549	$	257,914
Operating income (loss)	$	8,992	$	4,863	$	12,443	$	(1,584)
Depreciation and amortization expense	$	(4,543)	$	(4,960)	$	(14,063)	$	(14,975)
Total assets	$	258,894	$	252,995	$	258,894	$	252,995
Property, plant and equipment, net	$	109,522	$	117,071	$	109,522	$	117,071
Concrete
Contract revenues	$	76,552	$	92,103	$	249,217	$	250,683
Operating (loss) income	$	4,093	$	1,229	$	9,091	$	1,076
Depreciation and amortization expense	$	(2,223)	$	(2,120)	$	(6,599)	$	(6,367)
Total assets	$	123,626	$	124,112	$	123,626	$	124,112
Property, plant and equipment, net	$	16,389	$	16,985	$	16,389	$	16,985