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Segment Information - Key Servicing Metrics (Details) - Agency Business - MSRs - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Segment Reporting Information [Line Items]
Servicing Portfolio UPB	$ 33,470,357	$ 30,983,455
Wtd. Avg. Servicing Fee Rate (basis points)	0.378%	0.391%
Wtd. Avg. Life of Portfolio (years)	6 years 10 months 24 days	8 years
SFR - Fixed Rate
Segment Reporting Information [Line Items]
Servicing Portfolio UPB	$ 271,859	$ 287,446
Wtd. Avg. Servicing Fee Rate (basis points)	0.201%	0.201%
Wtd. Avg. Life of Portfolio (years)	4 years 4 months 24 days	5 years 1 month 6 days
Fannie Mae
Segment Reporting Information [Line Items]
Servicing Portfolio UPB	$ 22,730,056	$ 21,264,578
Wtd. Avg. Servicing Fee Rate (basis points)	0.464%	0.474%
Wtd. Avg. Life of Portfolio (years)	6 years 4 months 24 days	7 years 4 months 24 days
Freddie Mac
Segment Reporting Information [Line Items]
Servicing Portfolio UPB	$ 6,077,020	$ 5,181,933
Wtd. Avg. Servicing Fee Rate (basis points)	0.215%	0.24%
Wtd. Avg. Life of Portfolio (years)	6 years 9 months 18 days	8 years 6 months
Private Label
Segment Reporting Information [Line Items]
Servicing Portfolio UPB	$ 2,605,980	$ 2,510,449
Wtd. Avg. Servicing Fee Rate (basis points)	0.187%	0.195%
Wtd. Avg. Life of Portfolio (years)	5 years 6 months	6 years 8 months 12 days
FHA
Segment Reporting Information [Line Items]
Servicing Portfolio UPB	$ 1,506,948	$ 1,359,624
Wtd. Avg. Servicing Fee Rate (basis points)	0.141%	0.144%
Wtd. Avg. Life of Portfolio (years)	19 years 2 months 12 days	19 years 2 months 12 days
Bridge
Segment Reporting Information [Line Items]
Servicing Portfolio UPB	$ 278,494	$ 379,425
Wtd. Avg. Servicing Fee Rate (basis points)	0.104%	0.109%
Wtd. Avg. Life of Portfolio (years)	3 years	3 years 2 months 12 days

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