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MORTGAGE BANKING OPERATIONS - Key Economic Assumptions (Details)	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
CPRs | Weighted Average
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs
Servicing asset, measurement input	0.0700	0.0819
CPRs | Single family | Weighted Average
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs
Servicing asset, measurement input	0.1489	0.1091	0.0884
CPRs | Single family | Minimum
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs
Servicing asset, measurement input	0.0680	0.0601
CPRs | Single family | Maximum
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs
Servicing asset, measurement input	0.3250	0.1110
Discount Rates | Weighted Average
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs
Servicing asset, measurement input	0.1000	0.1066
Discount Rates | Single family | Weighted Average
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs
Servicing asset, measurement input	0.1199	0.0935	0.0823
Discount Rates | Single family | Minimum
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs
Servicing asset, measurement input	0.1000	0.0974
Discount Rates | Single family | Maximum
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs
Servicing asset, measurement input	0.1700	0.1688
Discount Rates | Multifamily | Weighted Average
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs
Servicing asset, measurement input	0.1300	0.1300	0.1300
Discount Rates | Multifamily | Minimum
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs
Servicing asset, measurement input	0.1300	0.1300
Discount Rates | Multifamily | Maximum
Key economic assumptions and the sensitivity of the current fair valu for single family MSRs
Servicing asset, measurement input	0.1300	0.1300

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Topic 820
-SubTopic 10
-Name Accounting Standards Codification
-Section 50
-Paragraph 2
-Subparagraph (bbb)(2)
-Publisher FASB
-URI https://asc.fasb.org//1943274/2147482106/820-10-50-2

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