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Segment Information, Geographical Data and Major Customers (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 | Dec. 31, 2015 | Sep. 30, 2015 | Jun. 30, 2015 | Mar. 31, 2015 | Dec. 31, 2014 | Sep. 30, 2014 | Jun. 30, 2014 | Dec. 31, 2013 | Mar. 31, 2016 | Mar. 31, 2015 | Mar. 31, 2014
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ 955,400 | $ 1,468,358 |  | $ 1,418,461
Other operating revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 23,662 | 27,159 |  | 16,642
Total revenues |  | $ 184,174 |  | $ 218,191 |  | $ 271,923 |  | $ 304,774 |  | $ 324,762 |  | $ 387,554 |  | $ 397,524 |  | $ 385,677 |  |  | 979,062 | 1,495,517 |  | 1,435,103
Operating profit (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 69,574 | 285,934 |  | 296,878
General and administrative expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (153,811) | (189,819) |  | (187,976)
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 182,309 | 175,204 |  | 167,480
Corporate expenses |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (40,238) | (44,635) |  | (50,776)
Gain on asset dispositions, net |  | 6,692 |  | 5,883 |  | 6,111 |  | 7,351 |  | 10,704 |  | 4,699 |  | 4,500 |  | 3,893 |  |  | 26,037 | 23,796 |  | 21,063
Asset impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (117,311) | (14,525) |  | (9,341)
Goodwill impairment |  |  |  |  |  |  |  |  |  |  |  | (283,699) |  |  |  |  |  | $ (56,283) |  | (283,699) | [1] | (56,283)
Restructuring charge |  |  |  |  |  | (7,600) |  |  |  | (4,100) |  |  |  |  |  |  |  |  | (7,586) | (4,052) |  |
Operating income (loss) |  | (56,569) | [2] | $ (9,400) | [2] | $ (17,644) | [2] | $ 14,089 | [2] | 25,672 | [2] | $ (213,580) | [2] | $ 84,723 | [2] | $ 66,004 | [2] |  | (69,524) | (37,181) |  | 201,541
Foreign exchange gain / (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (5,403) | 8,678 |  | 1,541
Equity in net earnings / (losses) of unconsolidated companies |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (13,581) | 10,179 |  | 15,801
Interest income and other, net |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 2,703 | 1,927 |  | 2,123
Loss on early extinguishment of debt |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,144)
Interest and other debt costs |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (53,752) | (50,029) |  | (43,814)
Earnings (loss) before income taxes |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (139,557) | (66,426) |  | 173,048
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 194,485 | 366,563 |  | 806,484
Assets |  | 4,990,547 |  |  |  |  |  |  |  | 4,756,162 |  |  |  |  |  |  |  |  | 4,990,547 | 4,756,162 |  | 4,885,829
Investments in, at equity, and advances to unconsolidated companies |  | 37,502 |  |  |  |  |  |  |  | 65,844 |  |  |  |  |  |  |  |  | 37,502 | 65,844 |  | 63,928
Americas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (114,237) |  |
Asia/Pacific |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | $ (56,300) |  |  |  |
Sub-Saharan Africa/Europe |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Goodwill impairment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (169,462) |  |
All Other Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating profit (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,564) | (8,022) |  | (1,930)
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 5,721 | 3,973 |  | 295
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 10 | 18,571 |  | 31,841
Assets |  | 42,191 |  |  |  |  |  |  |  | 49,554 |  |  |  |  |  |  |  |  | 42,191 | 49,554 |  | 31,545
Assets Before Corporate Assets |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  | 4,063,801 |  |  |  |  |  |  |  | 4,302,945 |  |  |  |  |  |  |  |  | 4,063,801 | 4,302,945 |  | 4,467,470
Assets Before Equity Method Investments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Assets |  | 4,101,303 |  |  |  |  |  |  |  | 4,368,789 |  |  |  |  |  |  |  |  | 4,101,303 | 4,368,789 |  | 4,531,398
Operating Segments |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Operating profit (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 74,138 | 293,956 |  | 298,808
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 170,428 | 167,217 |  | 164,112
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 56,813 | 223,581 |  | 599,410
Assets |  | 4,021,610 |  |  |  |  |  |  |  | 4,253,391 |  |  |  |  |  |  |  |  | 4,021,610 | 4,253,391 |  | 4,435,925
Operating Segments | Americas |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 342,995 | 505,699 |  | 410,731
Operating profit (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 52,966 | 122,988 |  | 90,936
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 48,474 | 47,682 |  | 43,298
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 51,303 | 94,137 |  | 99,798
Assets | [3] | 1,101,699 |  |  |  |  |  |  |  | 1,016,133 |  |  |  |  |  |  |  |  | 1,101,699 | 1,016,133 |  | 1,017,736
Operating Segments | Asia/Pacific |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 89,045 | 150,820 |  | 154,618
Operating profit (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (1,687) | 11,541 |  | 29,044
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 22,386 | 18,383 |  | 17,174
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,917 | 91,497 |  | 2,586
Assets | [3] | 514,948 |  |  |  |  |  |  |  | 506,265 |  |  |  |  |  |  |  |  | 514,948 | 506,265 |  | 421,379
Operating Segments | Middle East/North Africa |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 168,471 | 205,787 |  | 186,524
Operating profit (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 27,349 | 37,258 |  | 42,736
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 28,150 | 27,538 |  | 24,441
Additions to properties and equipment |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,732 | 1,842 |  | 8,042
Assets | [3] | 582,281 |  |  |  |  |  |  |  | 666,983 |  |  |  |  |  |  |  |  | 582,281 | 666,983 |  | 613,303
Operating Segments | Sub-Saharan Africa/Europe |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Vessel revenues |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 354,889 | 606,052 |  | 666,588
Operating profit (loss) |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (4,490) | 122,169 |  | 136,092
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 71,418 | 73,614 |  | 79,199
Additions to properties and equipment | [4] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 1,861 | 36,105 |  | 488,984
Assets | [3] | 1,822,682 |  |  |  |  |  |  |  | 2,064,010 |  |  |  |  |  |  |  |  | 1,822,682 | 2,064,010 |  | 2,383,507
Corporate |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |
General and administrative expenses | [5] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | (34,078) | (40,621) |  | (47,703)
Depreciation and amortization |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 6,160 | 4,014 |  | 3,073
Additions to properties and equipment | [6] |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  |  | 137,662 | 124,411 |  | 175,233
Assets | [7] | $ 889,244 |  |  |  |  |  |  |  | $ 387,373 |  |  |  |  |  |  |  |  | $ 889,244 | $ 387,373 |  | $ 354,431
[1] | The total carrying amount of goodwill at March 31, 2014 is net of accumulated impairment charges $30.9 million and $56.3 million related to the Middle East/North Africa and Asia/Pacific segments, respectively.
[2] | Operating income consists of revenues less operating costs and expenses, depreciation, vessel operating leases, goodwill impairment, general and administrative expenses and gain on asset dispositions, net, of the company’s operations. Goodwill impairment by quarter for fiscal 2016 and 2015 and gain on asset dispositions, net, by quarter for fiscal 2016 and 2015, 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] | Included in Sub-Saharan Africa/Europe for the year ended March 31, 2014 is $245.6 million related to vessels acquired through the acquisition of Troms Offshore.
[5] | Included in Corporate general and administrative expenses for the year ended March 31, 2014 are transaction costs of $3.7 million related to the acquisition of Troms Offshore.
[6] | 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.
[7] | 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, 2016, 2015 and 2014, $136.8 million, $235.2 million and $228.9 million, respectively, of vessel construction costs are included in Corporate.

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