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MORTGAGE SERVICING RIGHTS - Additional Information (Details) - USD ($) $ in Billions | 9 Months Ended | 12 Months Ended
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Sep. 30, 2023 | Dec. 31, 2022
Transfers and Servicing [Abstract] |  |
Mortgage servicing right weighted average life | 8 years 6 months | 8 years 6 months
Unpaid principal balance of mortgage loans serviced | $ 83.7 | $ 78.9

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- Definition Weighted average life of securitized assets regardless of when the transfer occurred, in 'PnYnMnDTnHnMnS' format, for example, 'P1Y5M13D' represents the reported fact of one year, five months, and thirteen days. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 860 -SubTopic 20 -Name Accounting Standards Codification -Section 50 -Paragraph 4 -Subparagraph (b)(2) -Publisher FASB -URI https://asc.fasb.org//1943274/2147481326/860-20-50-4 + Details
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- Definition This is the sum of principal amount outstanding for both securitized and unsecuritized loans of all types. + 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 + Details
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- References No definition available. + Details
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