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WARRANTY (Tables)
6 Months Ended
Jun. 30, 2019
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability [Table Text Block]

Changes in the warranty liability during the six months ended June 30, 2019 and 2018, respectively, consisted of the following (amounts in thousands):
 
2019
 
2018
Warranty liability, January 1
$
16,327

 
$
18,612

Provision for warranty liabilities
1,722

 
4,213

Warranty payments made
(2,987
)
 
(3,818
)
Warranty liability, June 30
$
15,062

 
$
19,007