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Concentration Risk - Schedule of Revenue Concentration by Investment Strategy/Fund (Details) - Product Concentration Risk
12 Months Ended
Dec. 31, 2019
Dec. 31, 2018
Dec. 31, 2017
Federated Strategic Value Dividend strategy      
Concentration Risk [Line Items]      
Concentration risk 11.00% 15.00% 18.00%
Federated Government Obligations Fund      
Concentration Risk [Line Items]      
Concentration risk 10.00% 9.00% 10.00%
Federated Kaufmann Mid-Cap Growth strategy      
Concentration Risk [Line Items]      
Concentration risk 9.00% 10.00% 9.00%