Investments - Narrative (Details) - USD ($) $ in Thousands	Dec. 31, 2024	Dec. 31, 2023
Affiliates
Schedule of Investments [Line Items]
Investments	$ 54,160	$ 106,952
Investments—Consolidated Investment Companies
Schedule of Investments [Line Items]
Investments	82,441	70,543
Stocks of large companies | Investments—Consolidated Investment Companies
Schedule of Investments [Line Items]
Investments	7,400	4,900
Debt Securities | Investments—Consolidated Investment Companies
Schedule of Investments [Line Items]
Investments	70,400	59,100
Stocks of small and mid sized companies | Investments—Consolidated Investment Companies
Schedule of Investments [Line Items]
Investments	4,700	4,200
Federated Hermes Funds | Affiliates
Schedule of Investments [Line Items]
Investments	48,000	99,500
Separate Accounts | Affiliates
Schedule of Investments [Line Items]
Investments	6,200	7,500
Separate Accounts | Stocks of large companies | Affiliates
Schedule of Investments [Line Items]
Investments	2,800	3,400
Separate Accounts | Debt Securities | Affiliates
Schedule of Investments [Line Items]
Investments	$ 1,800	$ 2,400