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PRODUCT WARRANTY COSTS (Details) - USD ($)
$ in Thousands
3 Months Ended
Mar. 31, 2021
Mar. 31, 2020
Changes in the carrying amount of product warranty accruals    
Balance at beginning of year $ 21,760 $ 20,650
Accruals for warranties 3,136 4,117
Settlements (3,253) (3,591)
Foreign currency translation and other adjustments (156) (318)
Balance at end of year $ 21,487 $ 20,858