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Valuation and Qualifying Accounts
 12 Months Ended
Dec. 31, 2019
SEC Schedule, 12-09, Valuation and Qualifying Accounts [Abstract]  
Valuation and Qualifying Accounts
Schedule II
Valuation and Qualifying Accounts
(in thousands)Balance at Beginning
of Period		Charged to
Costs and
Expenses
Deductions(a)
Other(b)
Balance at
End of
Period
Year Ended December 31, 2019:
Allowance for doubtful accounts$11,051  $(108) $(1,235) $(783) $8,925  
Allowance for sales returns and miscellaneous claims(c)
—  —  —  —  —  
Year Ended December 31, 2018:
Allowance for doubtful accounts$9,043  $3,908  $(1,392) $(508) $11,051  
Allowance for sales returns and miscellaneous claims(c)
—  —  —  —  —  
Year Ended December 31, 2017:
Allowance for doubtful accounts$8,556  $3,296  $(3,174) $365  $9,043  
Allowance for sales returns and miscellaneous claims39,768  80,116  (75,066) 1,488  46,306  
(a) Charges to the accounts included in this column are for the purposes for which the reserves were created.
(b) Amounts included in this column primarily relate to foreign currency translation.