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GOODWILL AND INTANGIBLE ASSETS - Summary of Intangible Amortization Expense Estimated (Detail)
$ in Thousands
Sep. 30, 2018
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
Fiscal year ending December 31, 2018 $ 1,280
Fiscal year ending December 31, 2019 4,492
Fiscal year ending December 31, 2020 3,849
Fiscal year ending December 31, 2021 2,875
Fiscal year ending December 31, 2022 2,366
Thereafter $ 11,739