BUSINESS ACQUISITIONS - Schedule of Purchase Price Allocation (Details) - USD ($) $ in Thousands						12 Months Ended
	Nov. 17, 2023	Dec. 31, 2021	Dec. 20, 2021	Sep. 30, 2021	Aug. 23, 2021	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2023
Liabilities
Goodwill (Note 16)		$ 85,199				$ 85,199	$ 85,199	$ 131,857
Goodwill (bargain purchase gain)							49,700
Sculptor
Business Acquisition [Line Items]
Total Consideration	$ 630,300
Assets
Real estate and other securities	246,100
Cash and cash equivalents	267,500
Restricted cash	26,400
Other assets	1,102,400
Total Assets Acquired	1,642,400
Liabilities
Secured financing agreements	177,600
Secured notes and bonds payable	99,200
Accrued expenses and other liabilities	746,100
Total Liabilities Assumed	1,022,900
Noncontrolling interest	35,900
Net Assets	583,600
Goodwill (Note 16)	46,700
Cash consideration	600,600
Value of stock assumed	29,700
Intangible assets acquired	$ 275,000
Finite-lived intangible assets, useful life	10 years
Sculptor | Management contracts
Liabilities
Intangible assets acquired	$ 275,000
Finite-lived intangible assets, useful life	10 years
Caliber
Business Acquisition [Line Items]
Total Consideration		1,318,500		$ 1,318,500			1,318,500
Assets
Mortgage servicing rights, at fair value		1,507,500		1,507,500			1,507,500
Residential mortgage loans, held-for-sale, at fair value		7,685,700		7,685,700			7,685,700
Mortgage loans receivable, at fair value		0					0
Residential mortgage loans subject to repurchase		666,800		666,800			666,800
Cash and cash equivalents		472,700		472,700			472,700
Restricted cash		30,600		30,600			30,600
Servicer advance receivable		108,300		108,300			108,300
Intangible assets		41,000		41,000			41,000
Other assets		609,700		605,400			609,700
Total Assets Acquired		11,122,300		11,118,000			11,122,300
Liabilities
Secured financing agreements		7,090,600		7,090,600			7,090,600
Secured notes and bonds payable		1,121,800		1,121,800			1,121,800
Residential mortgage loans repurchase liability		666,800		666,800			666,800
Accrued expenses and other liabilities		918,600		917,000			918,600
Total Liabilities Assumed		9,797,800		9,796,200			9,797,800
Net Assets		1,324,500		$ 1,321,800			1,324,500
Goodwill (bargain purchase gain)							(6,000)
Cash consideration					$ 1,318,000
Intangible assets acquired					$ 41,028
Finite-lived intangible assets, useful life					6 years 7 months 6 days	7 years
Caliber | Trademarks/trade names
Liabilities
Intangible assets acquired					$ 2,483
Genesis
Business Acquisition [Line Items]
Total Consideration							1,634,600
Assets
Mortgage servicing rights, at fair value		0					0
Residential mortgage loans, held-for-sale, at fair value		0					0
Mortgage loans receivable, at fair value		1,505,600					1,505,600
Residential mortgage loans subject to repurchase		0					0
Cash and cash equivalents		16,400					16,400
Restricted cash		0					0
Servicer advance receivable		0					0
Intangible assets		56,800					56,800
Other assets		14,500					14,500
Total Assets Acquired		1,593,300					1,593,300
Liabilities
Secured financing agreements		0					0
Secured notes and bonds payable		0					0
Residential mortgage loans repurchase liability		0					0
Accrued expenses and other liabilities		14,400					14,400
Total Liabilities Assumed		14,400					14,400
Net Assets		1,578,900					1,578,900
Goodwill (Note 16)			$ 55,700
Goodwill (bargain purchase gain)							55,700
Cash consideration			1,630,000
Intangible assets acquired			$ 56,100
Finite-lived intangible assets, useful life			8 years 6 months
Genesis | Trademarks/trade names
Liabilities
Intangible assets acquired			$ 5,900
Finite-lived intangible assets, useful life			5 years
Genesis | Customer relationships
Liabilities
Intangible assets acquired			$ 44,700
Finite-lived intangible assets, useful life			9 years
2021 Acquisitions
Business Acquisition [Line Items]
Total Consideration							2,953,100
Assets
Mortgage servicing rights, at fair value		1,507,500					1,507,500
Residential mortgage loans, held-for-sale, at fair value		7,685,700					7,685,700
Mortgage loans receivable, at fair value		1,505,600					1,505,600
Residential mortgage loans subject to repurchase		666,800					666,800
Cash and cash equivalents		489,100					489,100
Restricted cash		30,600					30,600
Servicer advance receivable		108,300					108,300
Intangible assets		97,800					97,800
Other assets		624,200					624,200
Total Assets Acquired		12,715,600					12,715,600
Liabilities
Secured financing agreements		7,090,600					7,090,600
Secured notes and bonds payable		1,121,800					1,121,800
Residential mortgage loans repurchase liability		666,800					666,800
Accrued expenses and other liabilities		933,000					933,000
Total Liabilities Assumed		9,812,200					9,812,200
Net Assets		$ 2,903,400					$ 2,903,400