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PRODUCT WARRANTY COSTS (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2021
Sep. 30, 2020
Changes in the carrying amount of product warranty accruals    
Balance at beginning of year $ 21,760 $ 20,650
Accruals for warranties 8,446 13,629
Settlements (8,809) (10,699)
Foreign currency translation and other adjustments (306) (126)
Balance at end of year $ 21,091 $ 23,454