Segment Information (Tables)

3 Months Ended

Mar. 31, 2021

Segment Reporting [Abstract]

Schedule of segment reporting

	Three Months Ended
			March 31,
	2021			2020
Marine
Contract revenues	$	72,146		$	85,949
Operating income		(9)			2,855
Depreciation and amortization expense		(4,358)			(4,776)
Total assets	$	268,345		$	255,311
Property and equipment, net		106,071			112,384
Concrete
Contract revenues	$	81,163		$	80,671
Operating income		2,064			1,510
Depreciation and amortization expense		(2,127)			(2,116)
Total assets	$	126,510		$	129,509
Property and equipment, net		14,808			16,731