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Acquisitions (Details) - USD ($) $ in Thousands | Feb. 12, 2018 | Jan. 22, 2018 | Jun. 30, 2019 | Dec. 31, 2018 | Feb. 11, 2018 | Jan. 21, 2018
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Acquisitions [Abstract] |  |  |  |  |  |
Goodwill |  |  | $ 196,573 | $ 196,573 |  |
Nutritional Product Manufacturer [Member] |  |  |  |  |  |
Acquisitions [Abstract] |  |  |  |  |  |
Percentage of acquired entity held by third party |  | 8.00% |  |  |  |
Innuvate [Member] |  |  |  |  |  |
Acquisitions [Abstract] |  |  |  |  |  |
Percentage of entity acquired |  | 73.00% |  |  |  |
Ownership interest in equity method investment |  |  |  |  |  | 27.00%
Consideration paid in cash and shares |  | $ 23,500 |  |  |  |
Goodwill |  |  |  | 17,200 |  |
Innuvate [Member] | Nutritional Product Manufacturer [Member] |  |  |  |  |  |
Acquisitions [Abstract] |  |  |  |  |  |
Percentage of entity acquired |  | 92.00% |  |  |  |
Treviso [Member] |  |  |  |  |  |
Acquisitions [Abstract] |  |  |  |  |  |
Percentage of entity acquired | 65.00% |  |  |  |  |
Ownership interest in equity method investment |  |  |  |  | 35.00% |
Consideration paid in cash and shares | $ 83,900 |  |  |  |  |
Goodwill |  |  |  | 42,500 |  |
L&W [Member] |  |  |  |  |  |
Acquisitions [Abstract] |  |  |  |  |  |
Percentage of entity acquired | 100.00% |  |  |  |  |
Consideration paid in shares | $ 25,000 |  |  |  |  |
Goodwill |  |  |  | $ 12,800 |  |

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