Investments - Impairment (Losses) Recoveries on Investments (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Schedule of Impairments [Line Items]
Credit (impaired) recovered	$ 670	$ 500
Net impairment (losses) recoveries recognized in earnings	(9,766)	(667)	$ 209
Available-for-sale securities
Schedule of Impairments [Line Items]
Intent to sell	(1,759)	(167)	(10)
Credit (impaired) recovered	(670)	(500)	67
Total available-for-sale securities	(2,429)	(667)	57
Agent loans
Schedule of Impairments [Line Items]
Net impairment (losses) recoveries recognized in earnings	0	0	152
Other loans receivable
Schedule of Impairments [Line Items]
Net impairment (losses) recoveries recognized in earnings	$ (7,337)	$ 0	$ 0