Investments - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning of period	$ 597	$ 249
Provision and recoveries	484	670
Sales/collections and write-offs	(568)	(322)
Allowance for credit losses, end of period	513	597
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning of period	0	0
Provision and recoveries	2,167	0
Sales/collections and write-offs	0	0
Allowance for credit losses, end of period	2,167	0
Other loans receivable
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning of period	11,081	3,775
Provision and recoveries	1,117	7,404
Sales/collections and write-offs	0	(98)
Allowance for credit losses, end of period	12,198	11,081
Agent loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning of period	957	957
Provision and recoveries	355	0
Sales/collections and write-offs	0	0
Allowance for credit losses, end of period	$ 1,312	$ 957