FAIR VALUE MEASUREMENTS - Schedule of Changes in the Company’s Level 3 Financial Liabilities (Details) - Recurring Basis $ in Thousands	6 Months Ended
	Jun. 30, 2024 USD ($)
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	$ 772,925
Transfers from Level 3	0
Transfers to Level 3	352,683
Computershare Mortgage Acquisition (Note 3)	125,168
Gains (losses) included in net income
Servicing revenue, net	(9,026)
Other income	11,323
Purchases, sales and repayments
Purchases	0
Proceeds from sales	451,128
Payments	(356,997)
Other	390
Ending balance	1,347,594
Asset-Backed Securities Issued
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	235,770
Transfers from Level 3	0
Transfers to Level 3	0
Computershare Mortgage Acquisition (Note 3)	0
Gains (losses) included in net income
Servicing revenue, net	0
Other income	2,451
Purchases, sales and repayments
Purchases	0
Proceeds from sales	0
Payments	(32,935)
Other	0
Ending balance	205,286
Notes Payable of CFEs - Consolidated Funds
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	218,157
Transfers from Level 3	0
Transfers to Level 3	0
Computershare Mortgage Acquisition (Note 3)	0
Gains (losses) included in net income
Servicing revenue, net	0
Other income	3,644
Purchases, sales and repayments
Purchases	0
Proceeds from sales	0
Payments	0
Other	0
Ending balance	221,801
Notes Payable of CFEs - Mortgage Loans Receivable
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	318,998
Transfers from Level 3	0
Transfers to Level 3	0
Computershare Mortgage Acquisition (Note 3)	0
Gains (losses) included in net income
Servicing revenue, net	0
Other income	5,228
Purchases, sales and repayments
Purchases	0
Proceeds from sales	451,128
Payments	(324,062)
Other	390
Ending balance	451,682
Excess Spread Financing
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	0
Transfers from Level 3	0
Transfers to Level 3	0
Computershare Mortgage Acquisition (Note 3)	125,168
Gains (losses) included in net income
Servicing revenue, net	(9,026)
Other income	0
Purchases, sales and repayments
Purchases	0
Proceeds from sales	0
Payments	0
Other	0
Ending balance	116,142
Notes Receivable Financing
Fair Value, Liabilities Measured on Recurring Basis, Unobservable Input Reconciliation, Calculation [Roll Forward]
Beginning balance	0
Transfers from Level 3	0
Transfers to Level 3	352,683
Computershare Mortgage Acquisition (Note 3)	0
Gains (losses) included in net income
Servicing revenue, net	0
Other income	0
Purchases, sales and repayments
Purchases	0
Proceeds from sales	0
Payments	0
Other	0
Ending balance	$ 352,683