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Commitments and Contingencies - Self Insurance Disclosures (Details) - USD ($) $ in Thousands | 12 Months Ended |
--- | --- | ---
Dec. 31, 2017 | Dec. 31, 2016
Self-Insurance disclosures |  |
Employer's liability claims subject to per-occurrence deductible | $ 3,000 |
Workers automobile claims | 2,500 |
General liability claims subject to per-occurrence deductible | 5,000 |
Deductions in land rigs and for offshore rigs | 5,000 |
Self-insurance accruals | 150,900 | $ 157,400
Self-insurance recoveries/receivables | 29,000 |
South America Africa the Middle East and Asia Excluding Colombia |  |
Self-Insurance disclosures |  |
Political risk insurance losses deductible | 250 |
COLOMBIA |  |
Self-Insurance disclosures |  |
Political risk insurance deductible for foreign operation | 500 |
Latin American tax authority | Minimum |  |
Income tax |  |
Aggregate remaining amounts assessed or expected to assessed range | 3,000 |
Latin American tax authority | Maximum |  |
Income tax |  |
Aggregate remaining amounts assessed or expected to assessed range | $ 8,000 |

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- Definition Represents the amount of deductions in land rigs and for offshore rigs. + References No definition available. + Details
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- Definition Represents the amount of employer's liability claims subject to per-occurrence deductible. + References No definition available. + Details
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- Definition Represents the amount of general liability claims subject to per-occurrence deductible. + References No definition available. + Details
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- Definition Represents the amount of self-insurance recoveries/ receivables as of balance sheet date. + References No definition available. + Details
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- Definition Estimated amount of loss resulting from an adverse tax position. + 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 (d)(3) -URI http://asc.fasb.org/extlink&oid=84230637&loc=d3e32718-109319 + Details
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- Definition Carrying amount (including both current and noncurrent portions) of accrued known and estimated losses incurred as of the balance sheet date for which no insurance coverage exists, and for which a claim has been made or is probable of being asserted, typically arising from workmen's compensation-type of incidents and personal injury to nonemployees from accidents on the entity's property. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 210 -SubTopic 10 -Section S99 -Paragraph 1 -Subparagraph (SX 210.5-02.24) -URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682 + Details
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