Accrued Product Returns and Rebates (Details) - USD ($) $ in Thousands	Dec. 31, 2021	Dec. 31, 2020
Accrued Product Returns and Rebates
Accrued product rebates	$ 97,597	$ 96,589
Accrued product returns	35,127	29,603
Total	$ 132,724	$ 126,192