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Inventories (Details) (USD $)
Dec. 31, 2013
Dec. 31, 2012
Inventories [Abstract]    
Finished goods $ 154,272,000 $ 155,833,000
Work-in-progress 685,000 911,000
Raw materials 7,384,000 8,060,000
Inventories $ 162,341,000 $ 164,804,000