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GOODWILL AND INTANGIBLE ASSETS - Schedule of Estimated Aggregate Amortization Expense (Details) - USD ($)
$ in Thousands
Jun. 30, 2019
Mar. 31, 2019
Dec. 31, 2018
Jun. 30, 2018
Mar. 31, 2018
Dec. 31, 2017
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]            
2019 $ 960          
2020 1,591          
2021 1,313          
2022 1,137          
2023 960          
Thereafter 2,179          
Total $ 8,140 $ 3,702 $ 3,910 $ 308 $ 332 $ 356