Annual report pursuant to Section 13 and 15(d)

Inventories - Finished Goods Available for Resale (Detail)

v2.4.0.8
Inventories - Finished Goods Available for Resale (Detail) (USD $)
In Thousands, unless otherwise specified
Dec. 31, 2012
Dec. 31, 2011
Inventory By Segment [Line Items]    
Total $ 339,411 $ 247,696
Weight Management, Targeted Nutrition and Energy, Sports and Fitness [Member]
   
Inventory By Segment [Line Items]    
Total 303,800 223,500
Outer Nutrition [Member]
   
Inventory By Segment [Line Items]    
Total 17,500 11,100
Literature, promotional and other [Member]
   
Inventory By Segment [Line Items]    
Total $ 18,100 $ 13,100