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GOODWILL AND INTANGIBLE ASSETS - Schedule of Estimated Amortization Expense of Intangibles (Detail) - USD ($)
$ in Thousands
Mar. 31, 2019
Dec. 31, 2018
Goodwill and Intangible Assets Disclosure [Abstract]    
Remaining in 2019 $ 9,779  
2020 10,981  
2021 10,655  
2022 10,592  
2023 10,564  
Thereafter 52,199  
Total $ 104,770 $ 20,016