Segment Information, Geographical Data and Major Customers (Detail) - USD ($) $ in Thousands		3 Months Ended
		Jun. 30, 2017	Jun. 30, 2016
Segment Reporting Information [Line Items]
Vessel revenues		$ 112,257	$ 162,430
Other operating revenues		2,849	5,495
Total revenues		115,106	167,925
Operating profit (loss)		(29,897)	(23,669)
General and administrative expenses		(33,059)	(37,047)
Depreciation and amortization		36,287	44,552
Corporate expenses		(15,243)	(11,223)
Gain on asset dispositions, net		3,189	5,643
Asset impairments	[1]	(163,423)	(36,886)
Operating loss		(205,374)	(66,135)
Foreign exchange loss		(1,157)	(2,733)
Equity in net earnings (losses) of unconsolidated companies		4,517	(1)
Interest income and other, net		1,680	1,176
Reorganization items	[2]	(313,176)
Interest and other debt costs, net		(10,605)	(16,954)
Loss before income taxes		(524,115)	(84,647)
Additions to properties and equipment		1,627	10,115
All Other Segments
Segment Reporting Information [Line Items]
Operating profit (loss)		55	(427)
Depreciation and amortization		854	1,381
Operating Segments
Segment Reporting Information [Line Items]
Operating profit (loss)		(29,952)	(23,242)
Depreciation and amortization		34,892	42,441
Additions to properties and equipment		949	422
Operating Segments | Americas
Segment Reporting Information [Line Items]
Vessel revenues		31,887	60,608
Operating profit (loss)		(15,699)	(4,326)
Depreciation and amortization		10,748	12,778
Additions to properties and equipment		27	75
Operating Segments | Asia/Pacific
Segment Reporting Information [Line Items]
Vessel revenues		4,627	7,921
Operating profit (loss)		(4,782)	(5,574)
Depreciation and amortization		3,897	5,782
Additions to properties and equipment		32
Operating Segments | Middle East
Segment Reporting Information [Line Items]
Vessel revenues		23,139	24,202
Operating profit (loss)		3,466	(33)
Depreciation and amortization		3,849	5,112
Additions to properties and equipment		616	280
Operating Segments | Africa/Europe
Segment Reporting Information [Line Items]
Vessel revenues		52,604	69,699
Operating profit (loss)		(12,937)	(13,309)
Depreciation and amortization		16,398	18,769
Additions to properties and equipment		274	67
Corporate
Segment Reporting Information [Line Items]
General and administrative expenses		(14,702)	(10,493)
Depreciation and amortization		541	730
Additions to properties and equipment	[3]	$ 678	$ 9,693

[1] Refer to Note (16) for additional information regarding asset impairment charges.

[2] Refer to Note (4) for additional information regarding reorganization items.

[3] Included in Corporate are additions to properties and equipment relating to vessels currently under construction which have not yet been assigned to a non-corporate reporting segment as of the dates presented.