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Investments - Narrative (Details) - USD ($)
$ in Thousands
Jun. 30, 2023
Dec. 31, 2022
Affiliates    
Schedule of Investments [Line Items]    
Investments $ 69,625 $ 76,524
Consolidated Investment Companies    
Schedule of Investments [Line Items]    
Investments 108,426 108,448
Debt Securities | Consolidated Investment Companies    
Schedule of Investments [Line Items]    
Investments 81,500 57,800
Stocks of Large Companies | Consolidated Investment Companies    
Schedule of Investments [Line Items]    
Investments 19,400 45,300
Stocks of Small and Mid Sized Companies | Consolidated Investment Companies    
Schedule of Investments [Line Items]    
Investments 3,800 3,300
Mutual Fund | Consolidated Investment Companies    
Schedule of Investments [Line Items]    
Investments 3,700 2,100
Federated Hermes Funds | Affiliates    
Schedule of Investments [Line Items]    
Investments 62,400 67,000
Separate Accounts | Affiliates    
Schedule of Investments [Line Items]    
Investments 7,200 9,500
Separate Accounts | Debt Securities | Affiliates    
Schedule of Investments [Line Items]    
Investments 2,300 4,600
Separate Accounts | Stocks of Large Companies | Affiliates    
Schedule of Investments [Line Items]    
Investments $ 3,300 $ 3,400