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Investments - Narrative (Details) - USD ($) $ in Thousands | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | ---
Schedule of Investments [Line Items] |  |
Investments—Affiliates and Other | $ 80,640 | $ 76,524
Investments - consolidated investment companies | 83,366 | 108,448
Stocks of Large Companies |  |
Schedule of Investments [Line Items] |  |
Investments - consolidated investment companies | 18,600 | 45,300
Debt Securities |  |
Schedule of Investments [Line Items] |  |
Investments - consolidated investment companies | 57,700 | 57,800
Mutual Fund |  |
Schedule of Investments [Line Items] |  |
Investments - consolidated investment companies | 3,500 | 2,100
Stocks of Small and Mid Sized Companies |  |
Schedule of Investments [Line Items] |  |
Investments - consolidated investment companies | 3,500 | 3,300
Federated Hermes Funds |  |
Schedule of Investments [Line Items] |  |
Investments—Affiliates and Other | 73,500 | 67,000
Separate Accounts |  |
Schedule of Investments [Line Items] |  |
Investments—Affiliates and Other | 7,100 | 9,500
Separate Accounts | Stocks of Large Companies |  |
Schedule of Investments [Line Items] |  |
Investments—Affiliates and Other | 3,100 | 3,400
Separate Accounts | Debt Securities |  |
Schedule of Investments [Line Items] |  |
Investments—Affiliates and Other | $ 2,500 | $ 4,600

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