Property and Equipment (Tables)

9 Months Ended

Sep. 30, 2019

Property, Plant and Equipment [Abstract]

Summary of property and equipment

	September 30,		December 31,
	2019		2018
Automobiles and trucks	$	1,752	$	1,709
Building and improvements		43,831		43,628
Construction equipment		151,267		161,113
Vessels and other equipment		84,228		90,217
Office equipment		8,262		8,061
		289,340		304,728
Less: Accumulated depreciation		(193,235)		(195,373)
Net book value of depreciable assets		96,105		109,355
Construction in progress		2,088		2,785
Land		35,863		35,863
	$	134,056	$	148,003