Investments - Allowance for Credit Losses (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024
Debt Securities, Available-for-Sale, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning of period	$ 826	$ 575	$ 513	$ 597
Provision and recoveries	304	79	669	243
Sales/collections and write-offs	(249)	(151)	(301)	(337)
Allowance for credit losses, end of period	881	503	881	503
Debt Securities, Held-to-Maturity, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning of period	2,167	2,167	2,167	0
Provision and recoveries	0	0	0	2,167
Sales/collections and write-offs	0	0	0	0
Allowance for credit losses, end of period	2,167	2,167	2,167	2,167
Other loans receivable
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning of period	12,592	11,253	12,198	11,081
Provision and recoveries	446	185	840	357
Sales/collections and write-offs	0	0	0	0
Allowance for credit losses, end of period	13,038	11,438	13,038	11,438
Agent loans
Financing Receivable, Allowance for Credit Loss [Roll Forward]
Allowance for credit losses, beginning of period	1,476	957	1,312	957
Provision and recoveries	0	0	164	0
Sales/collections and write-offs	0	0	0	0
Allowance for credit losses, end of period	$ 1,476	$ 957	$ 1,476	$ 957