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Related Parties - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified |
12 Months Ended | ||
|---|---|---|---|
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Dec. 31, 2013
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Dec. 31, 2012
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Dec. 31, 2011
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Airplane Services
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| Related Party Transaction [Line Items] | |||
| Related party transactions | $ 1.2 | $ 1.0 | $ 1.1 |
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Directional Drilling Services
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| Related Party Transaction [Line Items] | |||
| Related party transactions | 0.2 | 0.7 | |
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Minimum | Logistic services
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| Related Party Transaction [Line Items] | |||
| Related party transactions | $ 0.1 | $ 0.1 | $ 0.1 |
| X | ||||||||||
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- Definition
Amount of transactions with related party during the financial reporting period. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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| X | ||||||||||
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- Details
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