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WARRANTY ACCRUALS - Changes in Accrual Balance (Details)
$ in Thousands
3 Months Ended
Mar. 31, 2020
USD ($)
Movement in Standard Product Warranty Accrual [Roll Forward]  
Balance at January 1, 2020 $ 0
Assumed liability in connection with ECI Merger 15,706
Current period provisions 502
Settlements (528)
Balance at March 31, 2020 $ 15,680