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Segment Information (Details) (USD $) In Thousands, unless otherwise specified | 3 Months Ended |
--- | --- | ---
Mar. 31, 2013 item | Mar. 31, 2012 | Dec. 31, 2012
Segment information |  |  |
Number of business segments | 3 |  |
Number of operating business segments | 2 |  |
Number of historical operating segments | 2 |  |
Net sales revenue: |  |  |
Total net sales revenue | $ 96,479 | $ 92,868 |
Contribution margin: |  |  |
Total contribution margin | 37,059 | 35,558 |
Selling, general and administrative | 30,117 | 26,384 |
Operating Income (Loss): |  |  |
Operating income | 6,942 | 9,174 |
Other income (expense), net | 330 | (110) |
Income before provision for income taxes | 7,272 | 9,064 |
Property, plant and equipment: |  |  |
Total property, plant and equipment | 27,891 |  | 27,950
United States |  |  |
Net sales revenue: |  |  |
Total net sales revenue | 39,148 | 39,737 |
Property, plant and equipment: |  |  |
Total property, plant and equipment | 21,081 |  | 20,923
Other |  |  |
Net sales revenue: |  |  |
Total net sales revenue | 57,331 | 53,131 |
Property, plant and equipment: |  |  |
Total property, plant and equipment | 3,294 |  | 3,492
Venezuela |  |  |
Property, plant and equipment: |  |  |
Total property, plant and equipment | 3,516 |  | 3,535
NSP Americas, Asia Pacific and Europe |  |  |
Net sales revenue: |  |  |
Total net sales revenue | 53,137 | 53,935 |
Contribution margin: |  |  |
Total contribution margin | 21,956 | 21,340 |
NSP Americas, Asia Pacific and Europe | Herbal Products |  |  |
Net sales revenue: |  |  |
Total net sales revenue | 30,376 | 30,644 |
NSP Americas, Asia Pacific and Europe | Vitamin, Mineral and Other Nutritional Supplements |  |  |
Net sales revenue: |  |  |
Total net sales revenue | 20,484 | 20,462 |
NSP Americas, Asia Pacific and Europe | Personal Care Products |  |  |
Net sales revenue: |  |  |
Total net sales revenue | 1,254 | 1,722 |
NSP Americas, Asia Pacific and Europe | Other Products |  |  |
Net sales revenue: |  |  |
Total net sales revenue | 1,023 | 1,107 |
NSP Russia, Central and Eastern Europe |  |  |
Net sales revenue: |  |  |
Total net sales revenue | 16,140 | 15,590 |
Contribution margin: |  |  |
Total contribution margin | 5,983 | 6,006 |
NSP Russia, Central and Eastern Europe | Herbal Products |  |  |
Net sales revenue: |  |  |
Total net sales revenue | 7,172 | 6,780 |
NSP Russia, Central and Eastern Europe | Vitamin, Mineral and Other Nutritional Supplements |  |  |
Net sales revenue: |  |  |
Total net sales revenue | 7,482 | 6,968 |
NSP Russia, Central and Eastern Europe | Personal Care Products |  |  |
Net sales revenue: |  |  |
Total net sales revenue | 1,429 | 1,793 |
NSP Russia, Central and Eastern Europe | Other Products |  |  |
Net sales revenue: |  |  |
Total net sales revenue | 57 | 49 |
Synergy WorldWide |  |  |
Net sales revenue: |  |  |
Total net sales revenue | 27,202 | 23,343 |
Contribution margin: |  |  |
Total contribution margin | 9,120 | 8,212 |
Synergy WorldWide | Herbal Products |  |  |
Net sales revenue: |  |  |
Total net sales revenue | 11,939 | 8,447 |
Synergy WorldWide | Vitamin, Mineral and Other Nutritional Supplements |  |  |
Net sales revenue: |  |  |
Total net sales revenue | 13,332 | 13,037 |
Synergy WorldWide | Personal Care Products |  |  |
Net sales revenue: |  |  |
Total net sales revenue | 1,570 | 1,438 |
Synergy WorldWide | Other Products |  |  |
Net sales revenue: |  |  |
Total net sales revenue | $ 361 | $ 421 |

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