Annual report pursuant to Section 13 and 15(d)

GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details)

v3.10.0.1
GOODWILL AND OTHER INTANGIBLE ASSETS - Narrative (Details) - USD ($)
$ in Thousands
 12 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2016
Goodwill and Intangible Assets Disclosure [Abstract]      
Amortization expense on intangible assets $ 31,562 $ 23,313 $ 20,821
Future amortization expense [Abstract]      
Future amortization expense 2019 32,128    
Future amortization expense 2020 30,388    
Future amortization expense 2021 28,976    
Future amortization expense 2022 27,387    
Future amortization expense 2023 $ 25,815