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Segment Information - Schedule of Entity-Wide Information, Revenue from External Customers by Products and Services (Detail) (USD $)
In Thousands, unless otherwise specified |
3 Months Ended | |||||
|---|---|---|---|---|---|---|
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Mar. 31, 2013
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Mar. 31, 2012
|
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| Revenue from External Customer [Line Items] | ||||||
| Net sales | $ 1,123,647 | $ 964,175 | ||||
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Weight Management [Member]
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| Revenue from External Customer [Line Items] | ||||||
| Net sales | 711,600 | 601,800 | ||||
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Targeted Nutrition [Member]
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| Revenue from External Customer [Line Items] | ||||||
| Net sales | 256,900 | 224,900 | ||||
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Energy, Sports and Fitness [Member]
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| Revenue from External Customer [Line Items] | ||||||
| Net sales | 58,300 | 48,100 | ||||
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Outer Nutrition [Member]
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| Revenue from External Customer [Line Items] | ||||||
| Net sales | 38,200 | 36,700 | ||||
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Literature, promotional and other [Member]
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| Revenue from External Customer [Line Items] | ||||||
| Net sales | $ 58,600 | [1] | $ 52,700 | [1] | ||
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