Segment Information - Schedule of Key Servicing Metrics (Details) - Agency Business - MSRs - USD ($) $ in Thousands	6 Months Ended	12 Months Ended
Jun. 30, 2026	Dec. 31, 2025
Segment Information
Servicing Portfolio UPB	$ 36,704,362	$ 36,203,807
Wtd. Avg. Servicing Fee Rate (basis points)	0.35%	0.356%
Wtd. Avg. Life of Portfolio (years)	5 years 9 months 18 days	6 years 1 month 6 days
SFR - Fixed Rate
Segment Information
Servicing Portfolio UPB	$ 272,226	$ 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	$ 24,419,734	$ 24,085,960
Wtd. Avg. Servicing Fee Rate (basis points)	0.439%	0.447%
Wtd. Avg. Life of Portfolio (years)	5 years 2 months 12 days	5 years 6 months
Freddie Mac
Segment Information
Servicing Portfolio UPB	$ 7,672,121	$ 7,455,088
Wtd. Avg. Servicing Fee Rate (basis points)	0.176%	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	$ 2,477,077	$ 2,558,048
Wtd. Avg. Servicing Fee Rate (basis points)	0.187%	0.187%
Wtd. Avg. Life of Portfolio (years)	4 years 1 month 6 days	4 years 6 months
FHA
Segment Information
Servicing Portfolio UPB	$ 1,585,871	$ 1,549,483
Wtd. Avg. Servicing Fee Rate (basis points)	0.138%	0.139%
Wtd. Avg. Life of Portfolio (years)	18 years 10 months 24 days	19 years 1 month 6 days
Bridge loan
Segment Information
Servicing Portfolio UPB	$ 277,333	$ 277,738
Wtd. Avg. Servicing Fee Rate (basis points)	0.104%	0.104%
Wtd. Avg. Life of Portfolio (years)	1 year 8 months 12 days	2 years 2 months 12 days