SECURITIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2024	Sep. 30, 2023	Sep. 30, 2024	Sep. 30, 2023
Debt Securities, Available-for-sale [Line Items]
Unrealized gains (losses) on agency mortgage-backed securities	$ 1,723,713	$ (2,713,126)	$ 160,841	$ (4,020,362)
Residential Investment securities sold, carrying value	2,800,000	6,900,000	16,000,000	20,500,000
Agency
Debt Securities, Available-for-sale [Line Items]
Unrealized gains (losses) on agency mortgage-backed securities	$ 1,700,000	$ (2,000,000)	$ 762,800	$ (2,400,000)