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Net Sales (Tables)
12 Months Ended
Dec. 31, 2020
Revenue from Contract with Customer [Abstract]  
Disaggregation of Revenue [Table Text Block]
The following table provides information on our net sales by geographic area. Information on net sales by segment is in Note 4.
Years Ended December 31,
(in thousands)202020192018
Net sales
United States$650,654 $728,125 $722,576 
China213,788 225,498 239,406 
Europe, Middle East, Africa, India651,645 700,081 756,258 
Asia Pacific, except China279,847 311,469 335,119 
Other foreign214,997 225,122 236,316 
Net sales $2,010,931 $2,190,295 $2,289,675