XML 52 R39.htm IDEA: XBRL DOCUMENT v3.10.0.1
Revenue from Contracts with Customers - Disaggregation of Revenue by Asset Class (Details) - USD ($)
$ in Thousands
3 Months Ended 9 Months Ended
Sep. 30, 2018
Sep. 30, 2017
Sep. 30, 2018
Sep. 30, 2017
Disaggregation of Revenue [Line Items]        
Total Revenue $ 308,616 $ 278,315 $ 828,461 $ 824,612
Equity        
Disaggregation of Revenue [Line Items]        
Total Revenue 138,624   344,323  
Money Market        
Disaggregation of Revenue [Line Items]        
Total Revenue 101,257   304,662  
Fixed-Income        
Disaggregation of Revenue [Line Items]        
Total Revenue 45,897   135,442  
Other        
Disaggregation of Revenue [Line Items]        
Total Revenue $ 22,838   $ 44,034