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Investments - Narrative (Details) - USD ($) $ in Thousands	Jun. 30, 2022	Dec. 31, 2021
Schedule of Investments [Line Items]
Investments—Affiliates and Other	$ 78,170	$ 87,805
Investments - consolidated investment companies	102,865	105,542
Debt Securities
Schedule of Investments [Line Items]
Investments - consolidated investment companies	62,300	65,200
Stocks of Large Companies
Schedule of Investments [Line Items]
Investments - consolidated investment companies	29,300	28,500
Stocks of Small and Mid Sized Companies
Schedule of Investments [Line Items]
Investments - consolidated investment companies	5,800	7,400
Federated Hermes Funds
Schedule of Investments [Line Items]
Investments—Affiliates and Other	68,900	77,600
Separate Accounts
Schedule of Investments [Line Items]
Investments—Affiliates and Other	9,300	10,200
Separate Accounts | Debt Securities
Schedule of Investments [Line Items]
Investments—Affiliates and Other	4,600	5,200
Separate Accounts | Stocks of Large Companies
Schedule of Investments [Line Items]
Investments—Affiliates and Other	$ 3,400	$ 3,400

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