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WARRANTY (Tables)
9 Months Ended
Sep. 30, 2018
Product Warranties Disclosures [Abstract]  
Schedule of Product Warranty Liability [Table Text Block] Changes in the warranty liability consisted of the following (amounts in thousands):
 
2018
 
2017
Warranty liability, January 1
$
18,612

 
$
17,926

Provision for warranty liabilities
5,522

 
5,377

Warranty payments made
(5,407
)
 
(5,693
)
Warranty liability, September 30
$
18,727

 
$
17,610