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Intangible Assets and Goodwill - Estimated Future Amortization of Intangible Assets, Other Than Goodwill (Details)
$ in Thousands
Sep. 30, 2019
USD ($)
Finite-Lived Intangible Assets, Amortization Expense, Maturity Schedule [Abstract]  
Remainder of 2019 $ 5,461
2020 23,168
2021 22,361
2022 19,064
2023 $ 14,353