MORTGAGE-BACKED SECURITIES - Sales (Details) - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2022	Sep. 30, 2021	Sep. 30, 2022	Sep. 30, 2021
Investments, Debt and Equity Securities [Abstract]
Proceeds From Sale Of Mortgage Backed Securities MBS Categorized As Trading			$ 2,731,497	$ 2,598,893
Investment Sales, Carrying Value			(2,864,169)	(2,601,961)
Marketable Securities, Realized Gain (Loss)	$ (66,143)	$ 2,977	(132,672)	(3,068)
Available For Sale Securities Gross Realized Gains			2,705	7,866
Available For Sale Securities Gross Realized Losses			(135,377)	(10,934)
Realized gains (losses) on mortgage-backed securities	$ (66,143)	$ 2,977	$ (132,672)	$ (3,068)