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GOODWILL AND INTANGIBLE ASSETS, Amortization Expense Related to Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Amortization Expense Related to Intangible Assets [Abstract]    
2019 $ 9,324  
2020 6,917  
2021 5,128  
2022 3,964  
2023 2,956  
Thereafter 8,106  
Net amortizable intangibles $ 36,395 $ 48,741