SECURITIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2025	Mar. 31, 2024
Debt Securities, Available-for-sale [Line Items]
Unrealized gains (losses) on agency mortgage-backed securities	$ 810,812	$ (994,127)
Residential Investment securities sold, carrying value	5,200,000	8,100,000
Agency
Debt Securities, Available-for-sale [Line Items]
Unrealized gains (losses) on agency mortgage-backed securities	$ 901,600	$ (674,000)