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GOODWILL AND OTHER INTANGIBLE ASSETS - Estimated Amortization Expense (Detail)
$ in Thousands
Sep. 30, 2017
USD ($)
Goodwill And Intangible Assets Disclosure [Abstract]  
2017 $ 118,983
2018 118,681
2019 118,407
2020 117,620
2021 $ 117,180