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Segment Information - Key Servicing Metrics (Details) - Agency Business - MSRs - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2025	Dec. 31, 2024
Segment Information
Servicing Portfolio UPB	$ 33,484,888	$ 33,470,357
Wtd. Avg. Servicing Fee Rate (basis points)	0.375%	0.378%
Wtd. Avg. Life of Portfolio (years)	6 years 8 months 12 days	6 years 10 months 24 days
SFR - Fixed Rate
Segment Information
Servicing Portfolio UPB	$ 276,839	$ 271,859
Wtd. Avg. Servicing Fee Rate (basis points)	0.201%	0.201%
Wtd. Avg. Life of Portfolio (years)	4 years 1 month 6 days	4 years 4 months 24 days
Fannie Mae
Segment Information
Servicing Portfolio UPB	$ 22,683,885	$ 22,730,056
Wtd. Avg. Servicing Fee Rate (basis points)	0.462%	0.464%
Wtd. Avg. Life of Portfolio (years)	6 years 2 months 12 days	6 years 4 months 24 days
Freddie Mac
Segment Information
Servicing Portfolio UPB	$ 6,123,074	$ 6,077,020
Wtd. Avg. Servicing Fee Rate (basis points)	0.214%	0.215%
Wtd. Avg. Life of Portfolio (years)	6 years 7 months 6 days	6 years 9 months 18 days
Private Label
Segment Information
Servicing Portfolio UPB	$ 2,603,122	$ 2,605,980
Wtd. Avg. Servicing Fee Rate (basis points)	0.187%	0.187%
Wtd. Avg. Life of Portfolio (years)	5 years 3 months 18 days	5 years 6 months
FHA
Segment Information
Servicing Portfolio UPB	$ 1,519,675	$ 1,506,948
Wtd. Avg. Servicing Fee Rate (basis points)	0.14%	0.141%
Wtd. Avg. Life of Portfolio (years)	19 years	19 years 2 months 12 days
Bridge loan
Segment Information
Servicing Portfolio UPB	$ 278,293	$ 278,494
Wtd. Avg. Servicing Fee Rate (basis points)	0.104%	0.104%
Wtd. Avg. Life of Portfolio (years)	2 years 9 months 18 days	3 years

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