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COMMITMENTS, CONTINGENCIES AND REGULATORY MATTERS - Narrative (Details) - USD ($) $ in Millions	3 Months Ended			6 Months Ended
	Jun. 30, 2025	Mar. 31, 2025	Jun. 30, 2024	Jun. 30, 2025	Jun. 30, 2024	Dec. 31, 2024
Concentration Risk
Sublease income	$ 0.1		$ 0.1	$ 0.2	$ 0.3
Amounts held in escrow and trust accounts	$ 41.2			$ 41.2		$ 24.9
Minimum
Concentration Risk
Lease term (in years)	1 year			1 year
Maximum
Concentration Risk
Lease term (in years)	6 years			6 years
Onity Financial Corporation | Revenue | Customer Concentration Risk
Concentration Risk
Percentage of revenue from largest customer (in percent)	43.00%		44.00%	44.00%	44.00%
Highly Correlated - Onity | Revenue Benchmark | Customer Concentration Risk
Concentration Risk
Percentage of revenue from largest customer (in percent)	4.00%			5.00%
Rithm | Revenue | Customer Concentration Risk | Onity Financial Corporation
Concentration Risk
Percentage of revenue from largest customer (in percent)		11.00%
Percentage of delinquent loans Onity services (in percent)		0.58
Rithm | Revenue Benchmark | Customer Concentration Risk | Onity Financial Corporation
Concentration Risk
Percentage of revenue from largest customer (in percent)		11.00%

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