Restructuring charges (Tables)

12 Months Ended

Dec. 31, 2017

Restructuring And Related Activities [Abstract]

Schedule of Restructuring Charges

Restructuring charges currently recognized for the above actions are summarized as follows:

	Twelve Months Ended
	December 31, 2017
Costs of contract revenues - depreciation	$	6,859
Costs of contract revenues - other		16,102
General and administrative expenses		1,189
Loss on sale of assets—net		4,691
Total Dredging		28,841
Costs of contract revenues - depreciation		—
Costs of contract revenues - other		7
General and administrative expenses		637
Total Environmental & Infrastructure		644
Costs of contract revenues - depreciation		6,859
Costs of contract revenues - other		16,109
General and administrative expenses		1,826
Loss on sale of assets—net		4,691
Total Consolidated		29,485