Investments - Narrative (Details) $ in Thousands	Dec. 31, 2023 USD ($) security	Dec. 31, 2022 USD ($) security
Net Investment Income [Line Items]
Short-term investments	$ 35,588	$ 36,523
Long-term investments	$ 103,588	$ 55,118
Number of securities in an unrealized loss position | security	410	483
Unrealized loss position for 12 months or longer | security	80	218
Investments Held By Captive Reinsurance Business
Net Investment Income [Line Items]
Investments	$ 36,400
Short-term investments	1,700
Long-term investments	34,700
Certificates of deposit | Asset pledged as collateral
Net Investment Income [Line Items]
Investments, long-term	1,300	$ 1,200
Investments, short-term		200
U.S. Treasury notes | Asset pledged as collateral
Net Investment Income [Line Items]
Investments, long-term	$ 700	800
Investments, short-term		$ 500