Income Taxes - Additional Information (Details) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Income Tax [Line Items]
U.S. federal tax rate	21.00%	21.00%	21.00%
Capital gains rate (as a percent)	21.00%
Dividends received from investments in unconsolidated investees		$ 0	$ 0
Lower tax rate applicable to affiliated dividends paid to insurance companies	10.80%
Effective rate reduction due to unconsolidated investee dividends (as a percent)		0.00%	0.00%
Expected effective tax rate when deferred items reverse in future years (as a percent)	21.00%
ESOP dividends paid deduction	$ 2,545,000	$ 1,591,000	$ 4,171,000
Effective rate reduction due to dividend paid to ESOP (as a percent)	(0.60%)	(0.40%)	(0.60%)
Federal and state income taxes paid	$ 68,000,000	$ 50,000,000	$ 190,000,000
Maximum
Income Tax [Line Items]
Tax benefit from applying lower tax rate applicable to affiliated dividends paid to insurance companies	1,000,000
Prime Holdings Insurance Services, Inc. (Prime)
Income Tax [Line Items]
Dividends received from investments in unconsolidated investees	$ 3,000,000	$ 0	$ 0