SECURITIES - Narrative (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2024	Jun. 30, 2023	Jun. 30, 2024	Jun. 30, 2023
Debt Securities, Available-for-sale [Line Items]
Unrealized gains (losses) on agency mortgage-backed securities	$ (568,745)	$ (1,308,948)	$ (1,562,872)	$ (1,307,236)
Residential Investment securities sold, carrying value	5,200,000	8,400,000	13,300,000	13,600,000
Agency
Debt Securities, Available-for-sale [Line Items]
Unrealized gains (losses) on agency mortgage-backed securities	$ (274,900)	$ (744,700)	$ (948,900)	$ (358,000)