Segment Information (Tables)

6 Months Ended

Jun. 30, 2020

Segment Reporting [Abstract]

Schedule of segment reporting

	Three months ended				Six months ended
	June 30,				June 30,
		2020		2019		2020		2019
Marine
Contract revenues	$	91,719	$	89,023	$	177,668	$	150,510
Operating income (loss)	$	596	$	9	$	3,451	$	(6,447)
Depreciation and amortization expense	$	(4,744)	$	(5,069)	$	(9,520)	$	(10,015)
Total assets	$	233,326	$	236,917	$	233,326	$	236,917
Property, plant and equipment, net	$	111,416	$	117,262	$	111,416	$	117,262
Concrete
Contract revenues	$	91,994	$	76,962	$	172,665	$	158,580
Operating (loss) income	$	3,488	$	(432)	$	4,998	$	(153)
Depreciation and amortization expense	$	(2,260)	$	(2,153)	$	(4,376)	$	(4,247)
Total assets	$	138,095	$	125,872	$	138,095	$	125,872
Property, plant and equipment, net	$	15,555	$	17,783	$	15,555	$	17,783