Investments - Impairments on Available-For-Sale Securities and Agent Loans (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Available-for-sale securities:
Intent to sell	$ (167)	$ (10)	$ (2,274)
Credit (impaired) recovered	(500)	67	(707)
Total available-for-sale securities	(667)	57	(2,981)
Agent loans - expected credit recoveries (losses)	0	152	(297)
Net impairment (losses) recoveries recognized in earnings	$ (667)	$ 209	$ (3,278)