Stockholders' Equity - AOCI Reclassifications (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2022	Dec. 31, 2021	Dec. 31, 2020
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other, net	$ 9,297	$ 12,473	$ (4,571)
Net Income (Loss) Available To Common Stockholders, Basic And Participating Securities	(264,456)	295,995	(709,186)
Amounts Reclassified from AOCI
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net Income (Loss) Available To Common Stockholders, Basic And Participating Securities	0	0	(660,594)
Amounts Reclassified from AOCI | AOCI, Accumulated Gain (Loss), Debt Securities, Available-for-sale, Including Noncontrolling Interest
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Net realized (loss)/gain on sale of securities and residential whole loans	0	0	(389,127)
Other, net	0	0	(344,269)
Net Income (Loss) Available To Common Stockholders, Basic And Participating Securities	0	0	(733,396)
Amounts Reclassified from AOCI | Net  Gain/(Loss) on Swaps
Reclassification Adjustment out of Accumulated Other Comprehensive Income [Line Items]
Other, net	0	0	72,802
Net Income (Loss) Available To Common Stockholders, Basic And Participating Securities	$ 0	$ 0	$ 72,802