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INCOME TAXES - Additional Information (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended 12 Months Ended
Sep. 30, 2020
Sep. 30, 2019
Sep. 30, 2020
Sep. 30, 2019
Dec. 31, 2019
Income Tax Disclosure [Abstract]          
Income tax provision $ 3,711 $ 15,066 $ 3,013 $ 6,813  
Effective income tax benefit rate on US and foreign earnings, percent 21.20% 857.50% (20.30%) (30.00%)  
Goodwill and other impairments     $ 19,100   $ 42,990