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Revenue from Contracts with Customers - Disaggregation of Revenue by Asset Class (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Disaggregation of Revenue [Line Items]
Total Revenue	$ 381,143	$ 326,589	$ 1,071,915	$ 978,802
Equity
Disaggregation of Revenue [Line Items]
Total Revenue	127,183	172,349	406,642	510,302
Money market
Disaggregation of Revenue [Line Items]
Total Revenue	170,542	55,726	402,639	185,704
Fixed-income
Disaggregation of Revenue [Line Items]
Total Revenue	49,197	60,622	159,025	175,115
Other
Disaggregation of Revenue [Line Items]
Total Revenue	$ 34,221	$ 37,892	$ 103,609	$ 107,681

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Amount, excluding tax collected from customer, of revenue from satisfaction of performance obligation by transferring promised good or service to customer. Tax collected from customer is tax assessed by governmental authority that is both imposed on and concurrent with specific revenue-producing transaction, including, but not limited to, sales, use, value added and excise.

+ References

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