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v3.3.1.900

Company Overview (Details) $ in Thousands | 1 Months Ended | 3 Months Ended
--- | --- | ---
Feb. 29, 2016 USD ($) | Jan. 31, 2016 USD ($) renewal_option | Feb. 28, 2014 vessel | Mar. 31, 2016 USD ($) segment vessel | Mar. 31, 2015 USD ($)
Segment Reporting Information [Line Items] |  |  |  |  |
Number of reportable segments | segment |  |  |  | 3 |
Sale of ownership interest for cash |  |  |  | $ 25,000 | $ 0
Robotics [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of chartered vessels | vessel |  |  |  | 4 |
Monohull Vessels [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of vessels under construction | vessel |  |  | 2 |  |
Monohull Vessels [Member] | Well Intervention [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Number of vessels under construction | vessel |  |  |  | 2 |
Deepwater Gateway, L.L.C. [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Sale of ownership interest for cash | $ 25,000 |  |  |  |
Scotland |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Proceeds from sale of property |  | $ 11,000 |  |  |
Term of agreement |  | 15 years |  |  |
Number of renewal options | renewal_option |  | 2 |  |  |
Term of renewal option |  | 5 years |  |  |
Scotland | Building [Member] |  |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |  |
Gain from sale of property |  | $ 7,600 |  |  |

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