Investments - Impairments on Investments (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Schedule of Impairments [Line Items]
Credit impaired	$ 158	$ 55	$ 401	$ 278
Expected credit losses:
Held-to-maturity securities	0	0	(2,167)	0
Net impairment losses recognized in earnings	(698)	(113)	(3,763)	(1,917)
Total available-for-sale securities
Schedule of Impairments [Line Items]
Intent to sell	(1)	(58)	(299)	(1,639)
Credit impaired	(158)	(55)	(401)	(278)
Total available-for-sale securities	(159)	(113)	(700)	(1,917)
Held-to-maturity securities
Expected credit losses:
Held-to-maturity securities	0	0	(2,167)	0
Agent loans
Expected credit losses:
Net impairment losses recognized in earnings	(354)	0	(354)	0
Other loans receivable
Expected credit losses:
Net impairment losses recognized in earnings	$ (185)	$ 0	$ (542)	$ 0