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WARRANTY (Tables)
6 Months Ended
Jun. 30, 2020
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability [Table Text Block]

Changes in the warranty liability during the six months ended June 30, 2020 and 2019, respectively, consisted of the following (amounts in thousands):
 
2020
 
2019
Warranty liability, January 1
$
14,334

 
$
16,327

Provision for warranty liabilities
3,555

 
1,722

Warranty payments made
(3,784
)
 
(2,987
)
Warranty liability, June 30
$
14,105

 
$
15,062