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Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2021
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Valuation and Qualifying Accounts
Additions
(in thousands)Balance at beginning
of Year		Charge to costs
and expense
Other (1)
DeductionsBalance at
end of Year
Sales allowance accounts - 2021$17,971 $4,891 $(3,533)$5,477 $13,852 
Sales allowance accounts - 2020$14,397 $7,005 $1,221 $4,652 $17,971 
Sales allowance accounts - 2019$11,532 $6,965 $— $4,100 $14,397 
Valuation allowance for deferred tax assets - 2021$7,012 $2,903 $— $502 $9,413 
Valuation allowance for deferred tax assets - 2020$8,099 $606 $60 $1,753 $7,012 
Valuation allowance for deferred tax assets - 2019$6,904 $1,195 $— $— $8,099 

(1)Represents opening allowance balances related to acquisitions made during the period indicated. In addition, during the year ended December 31, 2021, due to a shift in revenue, certain sales allowance accounts were reclassified to accrued expenses.