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
Sep. 30, 2021
Jun. 30, 2021
Dec. 31, 2020
Sep. 30, 2020
Jun. 30, 2020
Dec. 31, 2019
Commitments and Contingencies Disclosure [Abstract]            
Standard product warranty accrual $ 26,551 $ 25,065 $ 23,743 $ 23,259 $ 21,578 $ 22,015