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OTHER ACCRUED LIABILITIES - Changes in Product Warranty Accrual (Details) - USD ($)
$ in Thousands
9 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Product Warranty Accrual [Roll Forward]    
Balance at beginning of period $ 22,575 $ 22,247
Provision for warranties issued in current year 3,132 5,253
Payments (4,951) (3,158)
Balance at end of period $ 20,756 $ 24,342