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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Sep. 30, 2013
Dec. 31, 2012
Inventory Disclosure [Abstract]    
Raw Materials $ 41,600 $ 43,469
Work-in-process 478 619
Inventories:    
Finished goods 148,792 167,646
Inventories $ 190,870 $ 211,734