DEBT OBLIGATIONS - 2029 Senior Unsecured Notes (Narrative) (Details) $ in Thousands		3 Months Ended
	Mar. 19, 2024 USD ($)	Mar. 31, 2024 USD ($)	Mar. 31, 2023 USD ($)
Debt Instrument [Line Items]
Debt instrument, face amount		$ 28,627,042
Interest expense and warehouse line fees		$ 414,365	$ 309,068
Senior Notes | 2029 Senior Notes
Debt Instrument [Line Items]
Debt instrument, face amount	$ 775,000
Issue price (as a percent)	98.981%
Interest rate	8.00%
Debt instrument, redemption price, percentage does not exceed principle amount (as a percent)	40.00%
Debt redemption percentage	108.00%	101.00%
Net proceeds	$ 759,000
Issuance fees	$ 9,100	$ 16,900
Interest expense and warehouse line fees		$ 2,100
Debt instrument, restrictive covenants, minimum total unencumbered assets maintenance requirement		1.20