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Goodwill and Intangible Assets - Schedule of Estimated Amortization Expense of Intangible Assets (Details) - USD ($)
$ in Thousands
Dec. 31, 2018
Dec. 31, 2017
Goodwill And Intangible Assets Disclosure [Abstract]    
2019 $ 14,829  
2020 7,876  
2021 5,114  
2022 3,353  
2023 2,199  
Later years 4,162  
Total finite-lived intangible assets, net $ 37,533 $ 67,094