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Commitments and Contingencies (Details) (USD $) | 1 Months Ended |
--- | --- | ---
Nov. 30, 2011 Plains Products Terminals LLC | Apr. 30, 2012 Pemex Exploracion y Produccion (PEP) case
Loss Contingencies |  |
Natural resources contamination - settlement paid | $ 550,000 |
Number of cases filed |  | 2

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