MORTGAGE-BACKED SECURITIES - Sales (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2022	Jun. 30, 2021	Jun. 30, 2022	Jun. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Proceeds From Sale Of Mortgage Backed Securities MBS Categorized As Trading			$ 1,934,606	$ 1,680,903
Investment Sales, Carrying Value			(2,001,135)	(1,686,948)
Marketable Securities, Realized Gain (Loss)	$ (15,443)	$ 1,352	(66,529)	(6,045)
Available For Sale Securities Gross Realized Gains			2,705	4,890
Available For Sale Securities Gross Realized Losses			(69,234)	(10,935)
Realized gains (losses) on mortgage-backed securities	$ (15,443)	$ 1,352	$ (66,529)	$ (6,045)