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Mortgage Servicing - Schedule of Product and Geographic Concentration (Details) - MSRs $ in Thousands	3 Months Ended	12 Months Ended
	Mar. 31, 2024 USD ($) state	Dec. 31, 2023 USD ($) state
Mortgage Servicing
Product Concentrations, UPB	$ 31,384,995	$ 30,983,455
Fee-based servicing portfolio
Mortgage Servicing
Product Concentrations, % of Total	100.00%	100.00%
New York | Fee-based servicing portfolio
Mortgage Servicing
Product Concentrations, % of Total	11.00%	11.00%
Texas | Fee-based servicing portfolio
Mortgage Servicing
Product Concentrations, % of Total	11.00%	11.00%
North Carolina | Fee-based servicing portfolio
Mortgage Servicing
Product Concentrations, % of Total	8.00%	8.00%
California | Fee-based servicing portfolio
Mortgage Servicing
Product Concentrations, % of Total	7.00%	8.00%
Georgia | Fee-based servicing portfolio
Mortgage Servicing
Product Concentrations, % of Total	6.00%	6.00%
Florida | Fee-based servicing portfolio
Mortgage Servicing
Product Concentrations, % of Total	6.00%	6.00%
New Jersey | Fee-based servicing portfolio
Mortgage Servicing
Product Concentrations, % of Total	5.00%	5.00%
Illinois | Fee-based servicing portfolio
Mortgage Servicing
Product Concentrations, % of Total	4.00%	4.00%
Other | Fee-based servicing portfolio
Mortgage Servicing
Product Concentrations, % of Total	42.00%	41.00%
Number of states | state	0	0
Fannie Mae
Mortgage Servicing
Product Concentrations, UPB	$ 21,548,221	$ 21,264,578
Fannie Mae | Fee-based servicing portfolio
Mortgage Servicing
Product Concentrations, % of Total	69.00%	69.00%
Freddie Mac
Mortgage Servicing
Product Concentrations, UPB	$ 5,301,291	$ 5,181,933
Freddie Mac | Fee-based servicing portfolio
Mortgage Servicing
Product Concentrations, % of Total	17.00%	17.00%
Private Label
Mortgage Servicing
Product Concentrations, UPB	$ 2,524,013	$ 2,510,449
Private Label | Fee-based servicing portfolio
Mortgage Servicing
Product Concentrations, % of Total	8.00%	8.00%
FHA
Mortgage Servicing
Product Concentrations, UPB	$ 1,365,329	$ 1,359,624
FHA | Fee-based servicing portfolio
Mortgage Servicing
Product Concentrations, % of Total	4.00%	4.00%
Bridge
Mortgage Servicing
Product Concentrations, UPB	$ 380,712	$ 379,425
Bridge | Fee-based servicing portfolio
Mortgage Servicing
Product Concentrations, % of Total	1.00%	1.00%
SFR - Fixed Rate.
Mortgage Servicing
Product Concentrations, UPB	$ 265,429	$ 287,446
SFR - Fixed Rate. | Fee-based servicing portfolio
Mortgage Servicing
Product Concentrations, % of Total	1.00%	1.00%

X

- Definition

Number of states accounted for more than 4% of unpaid principal balance and related servicing revenues.

+ References

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- Definition

The percentage of unpaid principal balance to total unpaid principal balance as of the balance sheet date.

+ References

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- References

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- Definition

This is the result of the principal amount outstanding of total loans managed or securitized less securitized loans and loans that are in the process of being securitized.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Name Accounting Standards Codification
-Section 50
-Subparagraph (a)
-Paragraph 4
-SubTopic 20
-Topic 860
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147481326/860-20-50-4

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