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Inventories (Details) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Inventories [Abstract]    
Finished goods, net $ 178,158 $ 165,503
Work in process, net 8,135 5,144
Raw materials, net 81,175 77,450
Total inventories, net $ 267,468 $ 248,097