| **Income Taxes - Schedule of Earliest Examination by Major Jurisdiction (Details)** | 12 Months Ended |
|-------------------------------------------------------------------------------------|-----------------|
||
| Ecuador                                                                             |            |
| **Income tax examination**                                                          |            |
| Open tax years by major tax jurisdiction                                            | 2011            |
| Norway                                                                              |            |
| **Income tax examination**                                                          |            |
| Open tax years by major tax jurisdiction                                            | 2004            |
| Germany                                                                             |            |
| **Income tax examination**                                                          |            |
| Open tax years by major tax jurisdiction                                            | 2009            |
| Saudi Arabia                                                                        |            |
| **Income tax examination**                                                          |            |
| Open tax years by major tax jurisdiction                                            | 2003            |
| Netherlands                                                                         |            |
| **Income tax examination**                                                          |            |
| Open tax years by major tax jurisdiction                                            | 2008            |
| UNITED STATES                                                                       |            |
| **Income tax examination**                                                          |            |
| Open tax years by major tax jurisdiction                                            | 2010            |

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| - Definition
Tax year that remains open to examination under enacted tax laws, in CCYY format.
+ References
Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 740 -SubTopic 10 -Section 50 -Paragraph 15 -Subparagraph (e) -URI http://asc.fasb.org/extlink&oid=6907707&loc=d3e32718-109319
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