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Goodwill and Intangible Assets - Amortization (Details) - USD ($)
$ in Thousands
Jun. 30, 2020
Dec. 31, 2019
Estimated amortization expense    
2020 (July 1 - December 31) $ 16,584  
2021 26,972  
2022 25,646  
2023 24,436  
2024 17,433  
2025 11,565  
Thereafter 53,132  
Total estimated amortization expense $ 175,768 $ 189,413