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WARRANTY (Tables)
6 Months Ended
Jun. 30, 2021
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability [Table Text Block]
Changes in the warranty liability during the six months ended June 30, 2021 and 2020, respectively, consisted of the following (amounts in thousands):
 20212020
Warranty liability, January 1$15,040 $14,334 
Provision for warranty liabilities5,747 3,555 
Warranty payments made(4,795)(3,784)
Warranty liability, June 30$15,992 $14,105