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Business Segment Information - Summary Of Intercompany Segment Revenues (Details) - USD ($) $ in Thousands | 3 Months Ended | 9 Months Ended
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Sep. 30, 2017 | Sep. 30, 2016 | Sep. 30, 2017 | Sep. 30, 2016
Segment Reporting Information [Line Items] |  |  |  |
Net revenues | $ (163,260) | $ (161,245) | $ (418,117) | $ (359,551)
Intercompany Elimination [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net revenues | 11,691 | 13,067 | 31,145 | 29,083
Intercompany Elimination [Member] | Well Intervention [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net revenues | 3,765 | 2,898 | 8,033 | 5,740
Intercompany Elimination [Member] | Robotics [Member] |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Net revenues | $ 7,926 | $ 10,169 | $ 23,112 | $ 23,343

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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=63488584&loc=d3e20235-122688 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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