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Inventories (Details) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Inventories [Abstract]    
Raw materials $ 35,100,000 $ 30,800,000
Work in process 6,300,000 6,500,000
Finished goods 26,300,000 26,500,000
Packaging and supplies 21,500,000 20,800,000
Total inventories $ 89,169,000 $ 84,569,000