INVESTMENT IN UNCONSOLIDATED COMPANIES (Tables)

12 Months Ended

Dec. 31, 2018

Equity Method Investments And Joint Ventures [Abstract]

Schedule of Investments in at Equity and Advances to Unconsolidated Companies

Investments in, at equity, and advances to unconsolidated joint venture companies were as follows:

		Successor
	Percentage	December 31,		December 31,
(In thousands)	Ownership	2018		2017
Sonatide Marine, Ltd. (Angola)	49%	$	—		26,935
DTDW Holdings, Ltd. (Nigeria)	40%		1,033		2,281
GulfMark Marine, Ltd. (Trinidad)	49%		6		—
Investments in, at equity, and advances to    unconsolidated companies		$	1,039		29,216

Schedule of Balances with Unconsolidated Affiliates

We maintained the following balances with their unconsolidated affiliates as of December 31, 2018 and December 31, 2017:

	Successor
	December 31,		December 31,
(in thousands)	2018		2017
Due from related parties:
Sonatide (Angola)	$	109,176		230,315
DTDW (Nigeria)		23,775		33,353
Due to related parties:
Sonatide (Angola)	$	29,347		99,448
DTDW (Nigeria)		5,625		9,645
Due from related parties, net of due to related parties	$	97,979		154,575

Schedule of Amounts Due from Affiliate

Amounts due from Sonatide

	Successor						Predecessor
				Period from			Period from
	Twelve Months			August 1, 2017			April 1, 2017
	Ended			through			through
(In thousands)	December 31, 2018			December 31, 2017			July 31, 2017
Due from Sonatide at beginning of year	$	230,315			252,393			262,652
Revenue earned by the company through Sonatide		56,916			40,303			34,397
Less amounts received from Sonatide		(76,878	)		(28,264	)		(21,019	)
Less amounts used to offset Due to Sonatide obligations (A)		(78,993	)		(33,607	)		(21,453	)
Less impairment of due from affiliate		(20,083	)		—			—
Other		(2,101	)		(510	)		(2,184	)
	$	109,176			230,315			252,393

(A) We reduced the respective due from affiliates and due to affiliates balances each period through netting transactions based on agreement with the joint venture.

Schedule of Amounts Due to Affiliate

Amounts due to Sonatide

	Successor						Predecessor
				Period from			Period from
	Twelve Months			August 1, 2017			April 1, 2017
	December 31,			through			through
(In thousands)	2018			December 31, 2017			July 31, 2017
Due to Sonatide at beginning of year	$	99,448			123,899			132,857
Plus commissions payable to Sonatide		5,502			3,928			3,330
Plus amounts paid by Sonatide on behalf of the company		14,778			12,044			9,458
Less commissions paid to Sonatide		(13,906	)		(5,023	)		—
Less amounts used to offset Due from Sonatide obligations (A)		(78,993	)		(33,607	)		(21,453	)
Other		2,518			(1,793	)		(293	)
	$	29,347		$	99,448			123,899

(A) We reduced the respective due from affiliates and due to affiliates balances each period through netting transactions based on agreement with the joint venture.