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Business segments (Income Statement by Segment) (Details) $ in Thousands | 3 Months Ended | 12 Months Ended
--- | --- | ---
Mar. 31, 2016 USD ($) segment | Mar. 31, 2015 USD ($) | Dec. 31, 2015 segment
Segment Reporting [Abstract] |  |  |
Number of operating segments | segment | 3 |  | 2
Segment Reporting Information [Line Items] |  |  |
Net revenues | $ 159,441 | $ 348,096 |
Operating income | (25,013) | 40,232 |
Transaction expenses | 166 | 217 |
Loss (gain) on sale of assets and other | (32) | (312) |
Operating Segments |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating income | (24,879) | 40,137 |
Operating Segments | Drilling & Subsea |  |  |
Segment Reporting Information [Line Items] |  |  |
Net revenues | 65,295 | 163,553 |
Operating income | (9,823) | 19,839 |
Operating Segments | Production & Infrastructure |  |  |
Segment Reporting Information [Line Items] |  |  |
Net revenues | 60,511 | 90,523 |
Operating income | (1,371) | 7,990 |
Operating Segments | Completions |  |  |
Segment Reporting Information [Line Items] |  |  |
Net revenues | 34,304 | 94,496 |
Operating income | (6,458) | 20,569 |
Intersegment Eliminations |  |  |
Segment Reporting Information [Line Items] |  |  |
Net revenues | (669) | (476) |
Corporate, Non-Segment |  |  |
Segment Reporting Information [Line Items] |  |  |
Operating income | $ (7,227) | $ (8,261) |

X
- Definition This element represents acquisition-related costs incurred to effect a business combination which costs have been expensed during the period. Such costs include finder's fees; advisory, legal, accounting, valuation, and other professional or consulting fees; general administrative costs, including the costs of maintaining an internal acquisitions department; and may include costs of registering and issuing debt and equity securities. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 10 -Section 25 -Paragraph 23 -URI http://asc.fasb.org/extlink&oid=34752592&loc=d3e1043-128460 + Details
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- Definition Number of operating segments. An operating segment is a component of an enterprise: (a) that engages in business activities from which it may earn revenues and incur expenses (including revenues and expenses relating to transactions with other components of the same enterprise), (b) whose operating results are regularly reviewed by the enterprise's chief operating decision maker to make decisions about resources to be allocated to the segment and assess its performance, and (c) for which discrete financial information is available. An operating segment may engage in business activities for which it has yet to earn revenues, for example, start-up operations may be operating segments before earning revenues. + References No definition available. + Details
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- Definition Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 225 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03.1) -URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688 + Details
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