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Portion of Fair Value Consideration Transferred Provisionally Assigned to Identifiable Intangible Assets (Detail) - USD ($) $ in Thousands | Oct. 11, 2017 | Apr. 20, 2017
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Seventy Seven Energy Inc. |  |
Business Acquisition [Line Items] |  |
Fair Value, Assets, Portion of the fair value consideration transferred |  | $ 22,500
Seventy Seven Energy Inc. | Favorable Drilling Contracts |  |
Business Acquisition [Line Items] |  |
Fair Value, Assets, Portion of the fair value consideration transferred |  | $ 22,500
Weighted Average Useful Life, Identifiable intangible assets |  | 9 months 29 days
MS Directional |  |
Business Acquisition [Line Items] |  |
Fair Value, Assets, Portion of the fair value consideration transferred | $ 74,682 |
Weighted Average Useful Life, Identifiable intangible assets | 7 years 6 months 3 days |
MS Directional | Developed Technology |  |
Business Acquisition [Line Items] |  |
Fair Value, Assets, Portion of the fair value consideration transferred | $ 48,000 |
Weighted Average Useful Life, Identifiable intangible assets | 10 years |
MS Directional | Customer Relationships |  |
Business Acquisition [Line Items] |  |
Fair Value, Assets, Portion of the fair value consideration transferred | $ 26,200 |
Weighted Average Useful Life, Identifiable intangible assets | 3 years |
MS Directional | Internal Use Software |  |
Business Acquisition [Line Items] |  |
Fair Value, Assets, Portion of the fair value consideration transferred | $ 482 |
Weighted Average Useful Life, Identifiable intangible assets | 5 years |

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- Definition Weighted average amortization period of finite-lived intangible assets acquired either individually or as part of a group of assets, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 350 -SubTopic 30 -Section 50 -Paragraph 1 -Subparagraph (a)(3) -URI http://asc.fasb.org/extlink&oid=66006027&loc=d3e16265-109275 + 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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- Definition Amount of intangible assets, excluding goodwill, acquired at the acquisition date. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 805 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (c) -URI http://asc.fasb.org/extlink&oid=84161108&loc=d3e4845-128472 + Details
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