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Investment in Equity Method Investee and Related Party Transactions (Narrative) (Details) - USD ($) $ in Millions | 9 Months Ended
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Sep. 30, 2023 | Sep. 30, 2022
Schedule of Equity Method Investments [Line Items] |  |
UPB of MSRs sold | $ 40.7 | $ 11,100.0
MAV Canopy HoldCo I, LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Ownership percentage | 15.00% |
MSR Asset Vehicle LLC |  |
Schedule of Equity Method Investments [Line Items] |  |
Unpaid principal balance of loans subserviced | $ 56,700.0 |
MSR Asset Vehicle LLC | Mortgage Servicing Rights Title Transferred |  |
Schedule of Equity Method Investments [Line Items] |  |
UPB of rights to MSRs sold | 29,200.0 |
Joint Marketing and Recapture Agreement |  |
Schedule of Equity Method Investments [Line Items] |  |
UPB of MSRs sold | 25.0 | 261.3
Other MSR Purchase and Sale Agreement |  |
Schedule of Equity Method Investments [Line Items] |  |
UPB of MSRs sold | $ 6,800.0 | $ 6,900.0

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- Definition Amount of contractual principal due at origination of mortgage loan within investment in mortgage loan on real estate by entity with substantial portion of business acquiring and holding investment real estate or interest in real estate. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Publisher SEC -Name Regulation S-X (SX) -Number 210 -Section 12 -Paragraph Column F -Subsection 29 Reference 2: http://www.xbrl.org/2003/role/disclosureRef -Publisher FASB -Name Accounting Standards Codification -Topic 948 -SubTopic 310 -Section S99 -Paragraph 1 -Subparagraph (SX 210.12-29(Column F)) -URI https://asc.fasb.org/extlink&oid=120402547&loc=d3e617274-123014 + Details
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