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Segment Information - Key Servicing Metrics (Details) - Agency Business Segment - MSRs - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021
Segment Information
Servicing Portfolio UPB	$ 27,998,029	$ 26,959,389
Wtd. Avg. Servicing Fee Rate (basis points)	41.10%	44.90%
Wtd. Avg. Life of Servicing Portfolio (in years)	8 years 7 months 6 days	8 years 9 months 18 days
SFR - Fixed Rate
Segment Information
Servicing Portfolio UPB	$ 274,764	$ 191,698
Wtd. Avg. Servicing Fee Rate (basis points)	19.80%	20.00%
Wtd. Avg. Life of Servicing Portfolio (in years)	6 years	6 years 6 months
Federal national mortgage association loans
Segment Information
Servicing Portfolio UPB	$ 19,038,124	$ 19,127,397
Wtd. Avg. Servicing Fee Rate (basis points)	50.20%	53.50%
Wtd. Avg. Life of Servicing Portfolio (in years)	8 years	8 years
Federal Home Loan Mortgage Corporation Loans
Segment Information
Servicing Portfolio UPB	$ 5,153,207	$ 4,943,905
Wtd. Avg. Servicing Fee Rate (basis points)	25.00%	27.10%
Wtd. Avg. Life of Servicing Portfolio (in years)	9 years	9 years 3 months 18 days
Private Label
Segment Information
Servicing Portfolio UPB	$ 2,074,859	$ 1,711,326
Wtd. Avg. Servicing Fee Rate (basis points)	18.50%	20.00%
Wtd. Avg. Life of Servicing Portfolio (in years)	7 years 7 months 6 days	8 years 3 months 18 days
FHA
Segment Information
Servicing Portfolio UPB	$ 1,155,893	$ 985,063
Wtd. Avg. Servicing Fee Rate (basis points)	14.90%	15.40%
Wtd. Avg. Life of Servicing Portfolio (in years)	19 years 6 months	21 years
Bridge loan
Segment Information
Servicing Portfolio UPB	$ 301,182
Wtd. Avg. Servicing Fee Rate (basis points)	12.50%
Wtd. Avg. Life of Servicing Portfolio (in years)	1 year 8 months 12 days

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