Quarterly report pursuant to Section 13 or 15(d)

Contingencies - Additional Information (Detail)

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Contingencies - Additional Information (Detail) (USD $)
Mar. 31, 2014
legalmatter
Commitment And Contingencies [Line Items]  
Number of pending claims 15
Amount accrued $ 0
Fine paid by for retention and use of individual agent in Nigeria with respect to customs-related issues $ 11,760,000