Quarterly report pursuant to Section 13 or 15(d)

COMMITMENTS AND CONTINGENCIES - Narrative (Details)

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COMMITMENTS AND CONTINGENCIES - Narrative (Details) - USD ($)
$ in Thousands
Mar. 31, 2021
Dec. 31, 2020
Mar. 31, 2020
Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]        
Standard product warranty accrual $ 23,767 $ 23,743 $ 22,090 $ 22,015