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Inventories (Schedule Of Inventories) (Details) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2014
Dec. 31, 2013
Inventories [Abstract]    
Finished goods $ 45,063 $ 56,664
Grain held for sale 10,399 23,782
Raw materials 49,507 51,726
Work-in-process 13,127 11,506
Supplies and parts 16,943 14,650
Inventories $ 135,039 $ 158,328