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Revenue from Contracts with Customers - Disaggregation of Revenue by Product Type (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Disaggregation of Revenue [Line Items]
Total Revenue	$ 423,540	$ 396,371
Federated Hermes Funds
Disaggregation of Revenue [Line Items]
Total Revenue	355,349	330,941
Separate Accounts
Disaggregation of Revenue [Line Items]
Total Revenue	64,087	61,503
Other
Disaggregation of Revenue [Line Items]
Total Revenue	$ 4,104	$ 3,927

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