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Revenue from Contracts with Customers - Disaggregation of Revenue by Product Type (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2025	Sep. 30, 2024	Sep. 30, 2025	Sep. 30, 2024
Disaggregation of Revenue [Line Items]
Total Revenue	$ 469,446	$ 408,456	$ 1,317,830	$ 1,207,410
Federated Hermes Funds
Disaggregation of Revenue [Line Items]
Total Revenue	393,278	344,795	1,106,073	1,014,383
Separate Accounts
Disaggregation of Revenue [Line Items]
Total Revenue	65,654	58,869	191,829	179,883
Other
Disaggregation of Revenue [Line Items]
Total Revenue	$ 10,514	$ 4,792	$ 19,928	$ 13,144

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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.

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