Quarterly report pursuant to Section 13 or 15(d)

Contingencies - Additional Information (Detail)

v2.4.1.9
Contingencies - Additional Information (Detail) (USD $)
In Millions, unless otherwise specified
Mar. 31, 2015
Commitment And Contingencies [Line Items]  
Fine paid by for retention and use of individual agent in Nigeria with respect to customs-related issues $ 11.76us-gaap_LitigationReserve