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Segment Information - Schedule of Key Servicing Metrics (Details) - Agency Business - MSRs - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2026	Dec. 31, 2025
Segment Information
Servicing Portfolio UPB	$ 36,311,087	$ 36,203,807
Wtd. Avg. Servicing Fee Rate (basis points)	0.355%	0.356%
Wtd. Avg. Life of Portfolio (years)	5 years 10 months 24 days	6 years 1 month 6 days
SFR - Fixed Rate
Segment Information
Servicing Portfolio UPB	$ 264,008	$ 277,490
Wtd. Avg. Servicing Fee Rate (basis points)	0.20%	0.20%
Wtd. Avg. Life of Portfolio (years)	3 years 9 months 18 days	4 years
Fannie Mae
Segment Information
Servicing Portfolio UPB	$ 24,261,724	$ 24,085,960
Wtd. Avg. Servicing Fee Rate (basis points)	0.444%	0.447%
Wtd. Avg. Life of Portfolio (years)	5 years 4 months 24 days	5 years 6 months
Freddie Mac
Segment Information
Servicing Portfolio UPB	$ 7,368,979	$ 7,455,088
Wtd. Avg. Servicing Fee Rate (basis points)	0.182%	0.183%
Wtd. Avg. Life of Portfolio (years)	5 years 8 months 12 days	5 years 10 months 24 days
Private Label
Segment Information
Servicing Portfolio UPB	$ 2,554,209	$ 2,558,048
Wtd. Avg. Servicing Fee Rate (basis points)	0.187%	0.187%
Wtd. Avg. Life of Portfolio (years)	4 years 3 months 18 days	4 years 6 months
FHA
Segment Information
Servicing Portfolio UPB	$ 1,584,644	$ 1,549,483
Wtd. Avg. Servicing Fee Rate (basis points)	0.138%	0.139%
Wtd. Avg. Life of Portfolio (years)	19 years	19 years 1 month 6 days
Bridge loan
Segment Information
Servicing Portfolio UPB	$ 277,523	$ 277,738
Wtd. Avg. Servicing Fee Rate (basis points)	0.104%	0.104%
Wtd. Avg. Life of Portfolio (years)	2 years	2 years 2 months 12 days

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