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Inventories (Detail) (USD $)
In Thousands, unless otherwise specified
Jun. 30, 2013
Dec. 31, 2012
Inventory Disclosure [Abstract]    
Inventory, Raw Materials, Net of Reserves $ 43,851 $ 43,469
Inventory, Work in Process, Net of Reserves 379 619
Inventories:    
Finished goods 143,000 167,646
Inventories $ 187,230 $ 211,734