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Revenue from Contracts with Customers - Disaggregation of Revenue by Product Type (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Disaggregation of Revenue [Line Items]
Total Revenue	$ 424,844	$ 402,583	$ 848,384	$ 798,954
Federated Hermes Funds
Disaggregation of Revenue [Line Items]
Total Revenue	357,446	338,647	712,795	669,588
Separate Accounts
Disaggregation of Revenue [Line Items]
Total Revenue	62,088	59,511	126,175	121,014
Other
Disaggregation of Revenue [Line Items]
Total Revenue	$ 5,310	$ 4,425	$ 9,414	$ 8,352

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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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