Summary of Significant Accounting Policies, Inventories (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Inventories [Abstract]
Raw materials	$ 118,877	$ 87,942
Finished goods	195,489	187,949
Total Inventory, net	314,366	275,891
Inventory Valuation Reserve [Member]
Valuation Allowance [Roll Forward]
Beginning balance	12,295	14,149	$ 8,081
Additions	15,952	14,931	23,940
Write-offs	(13,998)	(16,785)	(17,872)
Ending balance	$ 14,249	$ 12,295	$ 14,149

Amount before valuation and LIFO reserves of completed merchandise or goods expected to be sold within one year or operating cycle, if longer.

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Amount after valuation and LIFO reserves of inventory expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount before valuation and LIFO reserves of raw materials expected to be sold, or consumed within one year or operating cycle, if longer.

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Amount of valuation and qualifying accounts and reserves.

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Amount of increase in valuation and qualifying accounts and reserves from charge to cost and expense.

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