Investments - Narrative (Details) $ in Thousands	Sep. 30, 2024 USD ($) security	Dec. 31, 2023 USD ($) security
Net Investment Income [Line Items]
Short-term investments	$ 31,843	$ 35,588
Long-term investments	$ 165,935	$ 103,588
Number of securities in an unrealized loss position | security	345	410
Unrealized loss position for 12 months or longer | security	68
Investments Held By Captive Reinsurance Business
Net Investment Income [Line Items]
Investments	$ 31,800
Short-term investments	6,100
Long-term investments	$ 25,700