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Inventories (Schedule Of Major Components Of Inventories) (Details) - USD ($) $ in Thousands | Sep. 30, 2015 | Dec. 31, 2014
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Inventory Disclosure [Abstract] |  |
Petroleum products | $ 14,500 | $ 30,108
Crude oil | 28,352 | 7,266
Caustic soda | 3,265 | 2,850
NaHS | 2,952 | 6,603
Other | 0 | 2
Total | $ 49,069 | $ 46,829

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