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Commitments - Narrative (Details) - USD ($) $ in Millions	9 Months Ended
	Sep. 30, 2022	Dec. 31, 2021
Other Commitments [Line Items]
Threshold of outstanding principal balance on maximum claim amount (as a percent)	98.00%
Floating Rate Reverse Mortgage Loans
Other Commitments [Line Items]
Additional borrowing capacity to borrowers	$ 1,700.0	$ 1,500.0
Funded amount in connection with reverse mortgage loans	181.2
Forward Mortgage Loan Interest Rate Lock Commitments
Other Commitments [Line Items]
Short-term commitments to lend	1,300.0
Reverse loans IRLCs
Other Commitments [Line Items]
Short-term commitments to lend	$ 19.2
Customer Concentration Risk | Unpaid Principal Balance | Rithm
Other Commitments [Line Items]
Concentration risk (percent)	18.00%
Customer Concentration Risk | Loan Count | Rithm
Other Commitments [Line Items]
Concentration risk (percent)	28.00%
Customer Concentration Risk | Delinquent Loans | Rithm
Other Commitments [Line Items]
Concentration risk (percent)	69.00%

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- Definition

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- Definition

Short-term commitments to lend.

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- Definition

Threshold percentage of outstanding principal balance on maximum claim amount.

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+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 280
-SubTopic 10
-Section 50
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