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INCOME TAXES - Deferred Tax Assets and Liabilities (Details) - USD ($)
$ in Thousands
Dec. 31, 2019
Dec. 31, 2018
Income Tax Disclosure [Abstract]    
Net current deferred tax assets $ 5,055 $ 1,534
Net long-term deferred tax liabilities (4,452) (13,730)
Net deferred tax liabilities $ 603  
Net deferred tax liabilities   $ (12,196)