Quarterly report pursuant to Section 13 or 15(d)

Goodwill and Other Intangible Assets - Narrative (Details)

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Goodwill and Other Intangible Assets - Narrative (Details) - USD ($)
$ in Thousands
 3 Months Ended
Dec. 31, 2018
Dec. 31, 2017
Goodwill and Intangible Assets Disclosure [Abstract]    
Amortization expense on intangible assets $ 8,113 $ 6,681
Future amortization expense [Abstract]    
Future amortization expense for the remainder 2018 24,588  
Future amortization expense 2019 31,060  
Future amortization expense 2020 29,585  
Future amortization expense 2021 27,945  
Future amortization expense 2022 $ 26,338