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Nature of Operations and Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Dec. 31, 2014 | Dec. 31, 2013 | Mar. 31, 2016 | Mar. 31, 2015 | Mar. 31, 2014
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Extended useful life, months |  |  | 30 months |  |  |
Inspection interval |  |  | The majority of the company’s vessels require certification inspections twice in every five year period |  |  |
Goodwill impairment | $ 283,699 | $ 56,283 |  | $ 283,699 | [1] | $ 56,283
Stacked Vessels |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Property plant and equipment average age |  |  | 12 years 6 months | 20 years 8 months 12 days |  |
Maximum |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Highly liquid investments, maturities |  |  | 3 months |  |  |
Maximum | Marine Equipment |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Percentage of salvage values |  |  | 10.00% |  |  |
Maximum | Marine Equipment | From Date of Construction |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Estimated useful lives, years |  |  | 25 years |  |  |
Maximum | Other Property Plant and Equipment |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Estimated useful lives, years |  |  | 30 years |  |  |
Minimum | Marine Equipment |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Percentage of salvage values |  |  | 5.00% |  |  |
Minimum | Marine Equipment | From Date of Construction |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Estimated useful lives, years |  |  | 15 years |  |  |
Minimum | Marine Equipment | Regardless of Date Constructed |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Estimated useful lives, years |  |  | 6 years |  |  |
Minimum | Other Property Plant and Equipment |  |  |  |  |  |
Property, Plant and Equipment [Line Items] |  |  |  |  |  |
Estimated useful lives, years |  |  | 3 years |  |  |
[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.

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