Income Taxes - Narrative (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022
Net federal income tax liability, current	$ 21,000	$ 21,000
Deferred tax assets, valuation allowance	63,354	69,637
Unrecognized tax benefits that would impact effective tax rate	4,000
Unrecognized tax (benefits) and expenses, interest and penalties charged to income	776	(182)
Unrecognized tax benefits decreased amount	(879)
Decrease in unrecognized tax benefits is reasonably possible	297
Interest and Penalties
Unrecognized tax benefits that would impact effective tax rate	3,000
US Treasury Securities
Debt securities	$ 750,000	$ 596,000