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Goodwill and intangible assets (Schedule of Goodwill) (Details) - USD ($) | 12 Months Ended
--- | ---
Dec. 31, 2016 | Dec. 31, 2015 | Dec. 31, 2014
Goodwill [Roll Forward] |  |  |
Goodwill Balance at January 1, net | $ 669,036,000 | $ 798,481,000 |
Acquisitions, net of dispositions | 0 | 13,977,000 |
Impairment | 0 | (123,200,000) | $ 0
Impact of non-U.S. local currency translation | (16,293,000) | (20,222,000) |
Goodwill Balance at December 31, net | 652,743,000 | 669,036,000 | 798,481,000
Operating Segments | Drilling & Subsea |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill Balance at January 1, net | 334,595,000 | 472,891,000 |
Acquisitions, net of dispositions | 0 | 0 |
Impairment | 0 | (123,200,000) |
Impact of non-U.S. local currency translation | (17,189,000) | (15,096,000) |
Goodwill Balance at December 31, net | 317,406,000 | 334,595,000 | 472,891,000
Operating Segments | Completions |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill Balance at January 1, net | 316,914,000 | 307,448,000 |
Acquisitions, net of dispositions | 0 | 13,977,000 |
Impairment | 0 | 0 |
Impact of non-U.S. local currency translation | 779,000 | (4,511,000) |
Goodwill Balance at December 31, net | 317,693,000 | 316,914,000 | 307,448,000
Operating Segments | Production & Infrastructure |  |  |
Goodwill [Roll Forward] |  |  |
Goodwill Balance at January 1, net | 17,527,000 | 18,142,000 |
Acquisitions, net of dispositions | 0 | 0 |
Impairment | 0 | 0 |
Impact of non-U.S. local currency translation | 117,000 | (615,000) |
Goodwill Balance at December 31, net | $ 17,644,000 | $ 17,527,000 | $ 18,142,000

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