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Commitments - Narrative (Details) - USD ($) $ in Millions	3 Months Ended	6 Months Ended
	Jun. 30, 2024	Jun. 30, 2024	Dec. 31, 2023
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	$ 1,800.0
Funded amount in connection with reverse mortgage loans		119.5
Forward Mortgage Loan Interest Rate Lock Commitments
Other Commitments [Line Items]
Short-term commitments to lend	1,500.0	1,500.0
Reverse loans IRLCs
Other Commitments [Line Items]
Short-term commitments to lend	22.2	$ 22.2
Customer Concentration Risk | Servicing And Subservicing Fees Benchmark | Rithm
Other Commitments [Line Items]
Concentration risk (percent)		16.00%
Concentration Risk, Amount	$ 49.5
Customer Concentration Risk | Servicing And Subservicing Fees Benchmark | MAV Asset Vehicle LLC
Other Commitments [Line Items]
Concentration risk (percent)		13.00%
Concentration Risk, Amount		$ 39.6
Customer Concentration Risk | Unpaid Principal Balance | Rithm Capital Corp
Other Commitments [Line Items]
Concentration risk (percent)		14.00%
Customer Concentration Risk | Unpaid Principal Balance | MAV Asset Vehicle LLC
Other Commitments [Line Items]
Concentration risk (percent)		17.00%
Customer Concentration Risk | Loan Count | Rithm Capital Corp
Other Commitments [Line Items]
Concentration risk (percent)		25.00%
Customer Concentration Risk | Loan Count | MAV Asset Vehicle LLC
Other Commitments [Line Items]
Concentration risk (percent)		14.00%
Customer Concentration Risk | Delinquent Loans | Rithm
Other Commitments [Line Items]
Concentration risk (percent)		64.00%
Customer Concentration Risk | Servicing and Subservicing Portfolio Benchmark | MAV Asset Vehicle LLC
Other Commitments [Line Items]
Concentration Risk, Amount		$ 52,900.0

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