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Segment Information - Key Servicing Metrics (Details) - Agency Business Segment - MSRs - USD ($) $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
Segment Information
Servicing Portfolio UPB	$ 28,912,625	$ 27,998,029
Wtd. Avg. Servicing Fee Rate (basis points)	40.30%	41.10%
Wtd. Avg. Life of Servicing Portfolio (in years)	8 years 7 months 6 days	8 years 7 months 6 days
SFR - Fixed Rate
Segment Information
Servicing Portfolio UPB	$ 279,712	$ 274,764
Wtd. Avg. Servicing Fee Rate (basis points)	20.00%	19.80%
Wtd. Avg. Life of Servicing Portfolio (in years)	5 years 10 months 24 days	6 years
Fannie Mae
Segment Information
Servicing Portfolio UPB	$ 19,508,256	$ 19,038,124
Wtd. Avg. Servicing Fee Rate (basis points)	49.50%	50.20%
Wtd. Avg. Life of Servicing Portfolio (in years)	8 years	8 years
Fannie Mac
Segment Information
Servicing Portfolio UPB	$ 5,180,607	$ 5,153,207
Wtd. Avg. Servicing Fee Rate (basis points)	24.70%	25.00%
Wtd. Avg. Life of Servicing Portfolio (in years)	9 years 1 month 6 days	9 years
Private Label
Segment Information
Servicing Portfolio UPB	$ 2,233,500	$ 2,074,859
Wtd. Avg. Servicing Fee Rate (basis points)	19.60%	18.50%
Wtd. Avg. Life of Servicing Portfolio (in years)	7 years 8 months 12 days	7 years 7 months 6 days
FHA
Segment Information
Servicing Portfolio UPB	$ 1,242,669	$ 1,155,893
Wtd. Avg. Servicing Fee Rate (basis points)	14.70%	14.90%
Wtd. Avg. Life of Servicing Portfolio (in years)	19 years 9 months 18 days	19 years 6 months
Bridge loan
Segment Information
Servicing Portfolio UPB	$ 467,881	$ 301,182
Wtd. Avg. Servicing Fee Rate (basis points)	11.60%	12.50%
Wtd. Avg. Life of Servicing Portfolio (in years)	2 years 10 months 24 days	1 year 8 months 12 days

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