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WARRANTY (Tables)
3 Months Ended
Mar. 31, 2012
WARRANTY COSTS [Abstract]  
Schedule of Product Warranty Liability [Table Text Block]
Changes in the warranty liability consisted of the following (amounts in thousands):
 
2012
 
2011
Warranty liability, January 1
$
17,659

 
$
12,471

Provision for warranty liabilities
7,773

 
5,256

Warranty payments made
(5,899
)
 
(3,743
)
Warranty liability, March 31
$
19,533

 
$
13,984