Other Assets and Liabilities - Schedule of Other Liabilities (Details) - USD ($) $ in Thousands		Mar. 31, 2025	Dec. 31, 2024
Other Assets and Liabilities [Abstract]
Amount payable under securities lending agreements	[1]	$ 136,108	$ 125,723
Reinsurance funds withheld	[2]	125,138	121,983
Lease liability		35,567	37,442
Accrued compensation		26,112	55,971
Payable for securities		25,223	0
Current federal income taxes		25,173	23,290
Deferred ceding commissions		13,303	14,437
Other		55,564	52,710
Total other liabilities		$ 442,188	$ 431,556

[1] Represents the obligation to return cash collateral under our securities lending agreements. See Note 6 for additional information.

[2] Represents ceded premiums written held by Radian Guaranty to collateralize our reinsurers’ obligations primarily related to our Single Premium QSR Program. See Note 8 for additional information.