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WARRANTY (Tables)
 3 Months Ended
Mar. 31, 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
1,898

 
1,864

Warranty payments made
(1,336
)
 
(1,589
)
Warranty liability, March 31
$
19,174

 
$
18,201