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Goodwill and Intangible Assets - Summary of Estimated Amortization Expense for Future Years (Details)
$ in Thousands
Mar. 31, 2017
USD ($)
Amortization expense  
For the nine months ended December 31, 2017 $ 33,654
For the year ended December 31, 2018 32,749
For the year ended December 31, 2019 12,708
For the year ended December 31, 2020 2,009
For the year ended December 31, 2021 $ 1,544