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Commitments and Contingencies - Future Minimum Capital Payments under Certain Data Licensing Agreements (Details)
$ in Thousands
Mar. 31, 2019
USD ($)
Commitments And Contingencies Disclosure [Abstract]  
Remainder of 2019 $ 5,502
2020 7,506
2021 5,615
2022 1,652
Total $ 20,275