Segment Information (Tables)

9 Months Ended

Sep. 30, 2019

Segment Reporting [Abstract]

Schedule of Segment Reporting

	Three months ended				Nine months ended
	September 30,				September 30,
		2019		2018		2019		2018
Marine
Contract revenues	$	107,404	$	63,479	$	257,914	$	206,967
Operating income (loss)	$	4,863	$	(5,559)	$	(1,584)	$	4,348
Depreciation and amortization expense	$	(4,960)	$	(4,746)	$	(14,975)	$	(14,772)
Total assets	$	252,995	$	269,501	$	252,995	$	269,501
Property, plant and equipment, net	$	117,071	$	125,231	$	117,071	$	125,231
Concrete
Contract revenues	$	92,103	$	61,594	$	250,683	$	214,715
Operating (loss) income	$	1,229	$	(1,846)	$	1,076	$	(94)
Depreciation and amortization expense	$	(2,120)	$	(2,176)	$	(6,367)	$	(6,362)
Total assets	$	124,112	$	155,247	$	124,112	$	155,247
Property, plant and equipment, net	$	16,985	$	19,156	$	16,985	$	19,156