Investments - Narrative (Details) - USD ($)	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Investments
Accretion (amortization) of premiums and discounts on investments			$ 0	$ 412,000
Other income, net	$ 1,584,000	$ 1,278,000	6,815,000	4,211,000
Allowance for credit loss	0	0	0	0
Accrued interest receivable	0		0
Reclassification out of Accumulated Other Comprehensive Income
Investments
Other income, net	0	0	0	0
Other Nonoperating Income (Expense)
Investments
Interest income on investments	1,600,000	1,200,000	6,400,000	3,500,000
Accretion (amortization) of premiums and discounts on investments	$ 0	$ 0	$ 0	$ 400,000