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WARRANTY (Tables)
9 Months Ended
Sep. 30, 2021
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability [Table Text Block]
Changes in the warranty liability during the nine months ended September 30, 2021 and 2020, respectively, consisted of the following (amounts in thousands):
 20212020
Warranty liability, January 1$15,040 $14,334 
Provision for warranty liabilities7,397 4,060 
Warranty payments made(6,039)(4,346)
Warranty liability, September 30$16,398 $14,048