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v3.19.3.a.u2

Summary of Significant Accounting Policies, Inventories (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2019 | Dec. 31, 2018 | Dec. 31, 2017
Inventories [Abstract] |  |  |
Raw materials | $ 87,942 | $ 91,610 |
Finished goods | 187,949 | 204,211 |
Total Inventory, net | 275,891 | 295,821 |
Inventory Valuation Reserve [Member] |  |  |
Valuation Allowance [Roll Forward] |  |  |
Beginning balance | 14,149 | 8,081 | $ 7,995
Additions | 14,931 | 23,940 | 16,382
Write-offs | (16,785) | (17,872) | (16,296)
Ending balance | $ 12,295 | $ 14,149 | $ 8,081

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