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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Inventories [Abstract]    
Raw materials $ 30,822 $ 38,510
Work in process 6,465 6,044
Finished goods 26,485 26,055
Packaging and supplies 20,797 20,151
Total inventories $ 84,569 $ 90,760