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Goodwill and Intangible Assets - Future Amortization Expense for Intangible Assets (Details)
$ in Thousands
Dec. 31, 2018
USD ($)
Goodwill and Intangible Assets Disclosure [Abstract]  
2019 $ 18,832
2020 17,625
2021 16,279
2022 14,926
2023 13,793
Thereafter 62,231
Total intangibles assets, net carrying amount $ 143,686