Investments - Narrative (Details) $ in Thousands	Sep. 30, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Net Investment Income [Line Items]
Short-term investments	$ 28,679	$ 36,523
Long-term investments	$ 86,689	$ 55,118
Number of securities in an unrealized loss position | security	596	483
Unrealized loss position for 12 months or longer | security	86
Investments Held By Captive Reinsurance Business
Net Investment Income [Line Items]
Investments	$ 22,500
Short-term investments	1,900
Long-term investments	$ 20,500