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Investments - Narrative (Details) - USD ($) $ in Thousands | Dec. 31, 2021 | Dec. 31, 2020
--- | --- | ---
Schedule of Investments [Line Items] |  |
Investments—affiliates and other | $ 87,805 | $ 45,593
Investments - consolidated investment companies | 105,542 | 91,359
Debt Securities |  |
Schedule of Investments [Line Items] |  |
Investments - consolidated investment companies | 65,200 | 48,600
Stocks of large companies |  |
Schedule of Investments [Line Items] |  |
Investments - consolidated investment companies | 28,500 | 35,200
Stocks of small and mid sized companies |  |
Schedule of Investments [Line Items] |  |
Investments - consolidated investment companies | 7,400 | 6,400
Separate Accounts |  |
Schedule of Investments [Line Items] |  |
Investments—affiliates and other | 10,200 | 9,600
Separate Accounts | Debt Securities |  |
Schedule of Investments [Line Items] |  |
Investments—affiliates and other | 5,200 | 5,200
Separate Accounts | Stocks of large companies |  |
Schedule of Investments [Line Items] |  |
Investments—affiliates and other | 3,400 | 3,100
Federated Hermes Funds |  |
Schedule of Investments [Line Items] |  |
Investments—affiliates and other | $ 77,600 | $ 36,000

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