Description of Business and Summary of Significant Accounting Policies - Investments (Details) - USD ($) $ in Thousands	Dec. 31, 2022	Dec. 31, 2021
Net Investment Income [Line Items]
Debt securities, fair value disclosure	$ 91,641	$ 67,575
Asset pledged as collateral
Net Investment Income [Line Items]
Debt securities, fair value disclosure	2,679	3,440
Asset pledged as collateral | US Treasury Notes
Net Investment Income [Line Items]
Debt securities, fair value disclosure	1,216	1,276
Investments, short-term	500
Investments, long-term	800	1,300
Asset pledged as collateral | Certificates of deposit
Net Investment Income [Line Items]
Debt securities, fair value disclosure	1,463	2,164
Investments, short-term	200	1,300
Investments, long-term	$ 1,200	$ 900