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Commitments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended
	Mar. 31, 2023	Dec. 31, 2022
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	$ 1,800.0	$ 1,800.0
Funded amount in connection with reverse mortgage loans	67.7
Forward Mortgage Loan Interest Rate Lock Commitments
Other Commitments [Line Items]
Short-term commitments to lend	612.1
Reverse loans IRLCs
Other Commitments [Line Items]
Short-term commitments to lend	$ 21.9
Customer Concentration Risk | Unpaid Principal Balance | MAV Asset Vehicle LLC
Other Commitments [Line Items]
Concentration risk (percent)	17.00%
Customer Concentration Risk | Unpaid Principal Balance | Rithm Capital Corp
Other Commitments [Line Items]
Concentration risk (percent)	16.00%
Customer Concentration Risk | Loan Count | MAV Asset Vehicle LLC
Other Commitments [Line Items]
Concentration risk (percent)	13.00%
Customer Concentration Risk | Loan Count | Rithm Capital Corp
Other Commitments [Line Items]
Concentration risk (percent)	27.00%
Customer Concentration Risk | Delinquent Loans | Rithm
Other Commitments [Line Items]
Concentration risk (percent)	68.00%

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Short-term commitments to lend.

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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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-URI https://asc.fasb.org/extlink&oid=126901519&loc=d3e9054-108599

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