Goodwill And Other Intangible Assets (Tables)

12 Months Ended

Dec. 31, 2015

Goodwill And Intangible Assets Disclosure [Abstract]

Schedule of Goodwill

	Dredging Segment		Environmental & Remediation Segment			Total
Balance – January 1, 2014	$	76,576	$	2,750		$	79,326
Acquisition of Magnus Pacific		—		7,000			7,000
Balance – December 31, 2014		76,576		9,750			86,326
Impairment of goodwill		—		(2,750	)		(2,750	)
Balance – December 31, 2015	$	76,576	$	7,000		$	83,576

Schedule of the Net Book Value Of Identifiable Intangible Assets

As of December 31, 2015	Cost		Accumulated Amortization		Net
Non-compete agreements	$	3,085	$	1,625	$	1,460
Trade names		1,037		873		164
Other		1,306		502		804
	$	5,428	$	3,000	$	2,428
As of December 31, 2014
Non-compete agreements	$	3,085	$	940	$	2,145
Customer relationships		51		34		17
Acquired backlog		6,278		1,395		4,883
Trade names		1,037		185		852
Other		1,306		240		1,066
	$	11,757	$	2,794	$	8,963