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Segment Information, Geographical Data and Major Customers (Detail) - USD ($)
$ in Thousands
 3 Months Ended 12 Months Ended
Mar. 31, 2017
Dec. 31, 2016
Sep. 30, 2016
Jun. 30, 2016
Mar. 31, 2016
Dec. 31, 2015
Sep. 30, 2015
Jun. 30, 2015
Mar. 31, 2015
Dec. 31, 2014
Mar. 31, 2017
Mar. 31, 2016
Mar. 31, 2015
Segment Reporting Information [Line Items]                          
Vessel revenues                     $ 583,816 $ 955,400 $ 1,468,358
Other operating revenues                     17,795 23,662 27,159
Total revenues $ 160,749 [1] $ 129,215 [1] $ 143,722 [1] $ 167,925 [1] $ 184,174 $ 218,191 $ 271,923 $ 304,774     601,611 979,062 1,495,517
Operating profit (loss)                     (59,380) 69,574 285,934
General and administrative expenses                     (145,879) (153,811) (189,819)
Depreciation and amortization                     167,291 182,309 175,204
Corporate expenses                     (57,845) (40,238) (44,635)
Gain (loss) on asset dispositions, net                     24,099 26,037 23,796
Asset impairment (64,857) (253,422) (129,562) (36,886) (55,540) (15,141) (31,672) (14,958)     (484,727) (117,311) (14,525)
Goodwill impairment                   $ (283,700)     (283,699)
Restructuring charge             (7,600)   $ (4,100)     (7,586) (4,052)
Operating loss (69,340) [2] $ (287,034) [2] $ (155,344) [2] $ (66,135) [2] (56,569) [2] $ (9,400) [2] $ (17,644) [2] $ 14,089 [2]     (577,853) (69,524) (37,181)
Foreign exchange gain (loss)                     (1,638) (5,403) 8,678
Equity in net earnings (losses) of unconsolidated companies                     5,710 (13,581) 10,179
Interest income and other, net                     5,193 2,703 1,927
Interest and other debt costs, net                     (75,026) (53,752) (50,029)
Loss before income taxes                     (643,614) (139,557) (66,426)
Additions to properties and equipment                     30,547 194,485 366,563
Assets 4,190,699       4,983,793       4,748,766   4,190,699 4,983,793 4,748,766
Assets excluding equity investments 3,282,098       4,063,801       4,301,910   3,282,098 4,063,801 4,301,910
Investments in, at equity, and advances to unconsolidated companies 45,115       37,502       65,844   45,115 37,502 65,844
Assets except corporate portion 3,327,213       4,101,303       4,367,754   3,327,213 4,101,303 4,367,754
All Other Segments                          
Segment Reporting Information [Line Items]                          
Operating profit (loss)                     (1,548) (4,564) (8,022)
Depreciation and amortization                     4,430 5,721 3,973
Additions to properties and equipment                       10 18,571
Assets 21,580       42,191       49,554   21,580 42,191 49,554
Operating Segments                          
Segment Reporting Information [Line Items]                          
Operating profit (loss)                     (57,832) 74,138 293,956
Depreciation and amortization                     160,405 170,428 167,217
Additions to properties and equipment                     2,448 56,813 223,581
Assets 3,260,518       4,021,610       4,252,356   3,260,518 4,021,610 4,252,356
Operating Segments | Americas                          
Segment Reporting Information [Line Items]                          
Vessel revenues                     239,843 342,995 505,699
Operating profit (loss)                     18,873 52,966 122,988
Depreciation and amortization                     48,814 48,474 47,682
Additions to properties and equipment                     93 51,303 94,137
Assets [3] 779,778       1,101,699       1,016,133   779,778 1,101,699 1,016,133
Operating Segments | Asia/Pacific                          
Segment Reporting Information [Line Items]                          
Vessel revenues                     25,568 89,045 150,820
Operating profit (loss)                     (20,614) (1,687) 11,541
Depreciation and amortization                     21,095 22,386 18,383
Additions to properties and equipment                       1,917 91,497
Assets [3] 321,967       514,948       506,265   321,967 514,948 506,265
Operating Segments | Middle East                          
Segment Reporting Information [Line Items]                          
Vessel revenues                     89,050 111,356 134,279
Operating profit (loss)                     (4,696) 7,325 15,590
Depreciation and amortization                     19,754 19,218 18,881
Additions to properties and equipment                     1,612 1,732 962
Assets [3] 261,418       405,420       471,856   261,418 405,420 471,856
Operating Segments | Africa/Europe                          
Segment Reporting Information [Line Items]                          
Vessel revenues                     229,355 412,004 677,560
Operating profit (loss)                     (51,395) 15,534 143,837
Depreciation and amortization                     70,742 80,350 82,271
Additions to properties and equipment                     743 1,861 36,985
Assets [3] 1,897,355       1,999,543       2,258,102   1,897,355 1,999,543 2,258,102
Corporate                          
Segment Reporting Information [Line Items]                          
General and administrative expenses [4]                     (55,389) (34,078) (40,621)
Depreciation and amortization                     2,456 6,160 4,014
Additions to properties and equipment                     28,099 137,662 124,411
Assets [5] $ 863,486       $ 882,490       $ 381,012   $ 863,486 $ 882,490 $ 381,012
[1] Included in revenues for the fourth quarter is $39.1 million of revenue related to early cancellation of a long-term vessel charter contract.
[2] Operating income consists of revenues less operating costs and expenses, depreciation, vessel operating leases, goodwill impairment, restructuring charges, asset impairments, general and administrative expenses and gain on asset dispositions, net, of the company’s operations. Asset impairments, net, by quarter for fiscal 2017 and 2016, are as follows:
[3] Marine support services are conducted worldwide with assets that are highly mobile. Revenues are principally derived from offshore service vessels, which regularly and routinely move from one operating area to another, often to and from offshore operating areas in different continents. Because of this asset mobility, revenues and long-lived assets attributable to the company’s international marine operations in any one country are not material.
[4] Corporate general and administrative expenses in fiscal 2017 include $29 million associated with our efforts to renegotiate the terms of various debt arrangements and related consulting services.
[5] Included in Corporate are vessels currently under construction which have not yet been assigned to a non-corporate reporting segment. The vessel construction costs will be reported in Corporate until the earlier of the vessels being assigned to a non-corporate reporting segment or the vessels’ delivery. At March 31, 2017, 2016 and 2015, $52.4 million, $136.8 million and $235.2 million, respectively, of vessel construction costs are included in Corporate.