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Related Party Transactions - Narrative (Details) - USD ($) $ in Thousands | 1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended
--- | --- | --- | --- | ---
Oct. 31, 2019 | Dec. 31, 2018 | Sep. 30, 2018 | Dec. 31, 2019 | Dec. 31, 2017 | Dec. 31, 2014
Related Party Transactions |  |  |  |  |  |
Other assets |  | $ 25,027 |  | $ 27,236 |  |
Contingent consideration recognized |  |  | $ 26,830 |  | $ 58,520 |
Consulting service fee for IPO | $ 1,000 |  |  |  |  |
Consulting service fee for follow on offering | $ 500 |  |  |  |  |
Adjustment to additional paid in capital due to consulting service fee |  |  |  | 1,500 |  |
Refinitiv |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Other assets |  |  |  | 2,700 |  |
Refinitiv | Operating Expense Reimbursement |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Related party expense |  | $ 3,800 |  | $ 6,700 |  |
TR | Operating Expense Reimbursement |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Related party expense |  |  | $ 28,700 |  | $ 38,400 |
Banks |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Capital contribution |  |  |  |  |  | $ 120,000
Employees |  |  |  |  |  |
Related Party Transactions |  |  |  |  |  |
Investment by employees |  |  |  |  |  | $ 5,300

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