Contingencies - Additional Information (Detail) $ in Thousands |
Sep. 30, 2015
USD ($)
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| Commitment And Contingencies [Line Items] | |
| Fine paid by for retention and use of individual agent in Nigeria with respect to customs-related issues | $ 11,760 |
| X | ||||||||||
- Definition Commitment And Contingencies [Line Items] No definition available.
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| X | ||||||||||
- Definition Aggregate carrying amount of the estimated litigation liability for known or estimated probable loss from litigation, which may include attorneys' fees and other litigation costs. Reference 1: http://www.xbrl.org/2003/role/presentationRef
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