CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands		Total	Revision of Prior Period, Accounting Standards Update, Adjustment	Series C Preferred Stock	Series B Preferred Stock	Preferred Stock Series C Preferred Stock	Preferred Stock Series B Preferred Stock	Common Stock	Additional Paid-in Capital	Additional Paid-in Capital Series C Preferred Stock	Accumulated Deficit	Accumulated Deficit Revision of Prior Period, Accounting Standards Update, Adjustment	Accumulated Deficit Series C Preferred Stock	Accumulated Deficit Series B Preferred Stock	Accumulated Other Comprehensive Income
Balance (in shares) at Dec. 31, 2019						0	8,000	113,092
Beginning balance at Dec. 31, 2019		$ 3,383,952	$ (8,326)			$ 0	$ 80	$ 1,131	$ 3,643,734		$ (631,040)	$ (8,326)			$ 370,047
Increase (Decrease) in Stockholders' Equity
Net (loss)/income		(679,390)									(679,390)
Issuance of stock, net of expenses (in shares)						11,000		3,448
Issuance of stock, net of expenses		7,453		$ 266,052		$ 110		$ 34	7,419	$ 265,942
Repurchase of shares of common stock (in shares)	[1]							(3,611)
Repurchase of shares of common stock	[1]	(53,577)						$ (36)	(53,541)
Equity based compensation expense		6,715							6,715
Change in accrued dividends attributable to stock-based awards		856							856
Dividends declared on common stock		(56,546)									(56,546)
Dividends declared on preferred stock		(29,796)		(14,796)	$ (15,000)								$ (14,796)	$ (15,000)
Dividends attributable to dividend equivalents		(229)									(229)
Change in unrealized losses on securities, net		(313,115)													(313,115)
Derivative hedging instruments fair value changes and amortization, net		22,675													22,675
Warrants issued and repurchased, net		(19,608)							(19,608)
Changes in fair value of financing agreements at fair value due to changes in instrument-specific credit risk		(2,314)													(2,314)
Balance (in shares) at Dec. 31, 2020						11,000	8,000	112,929
Ending balance at Dec. 31, 2020		2,524,802				$ 110	$ 80	$ 1,129	3,851,517		(1,405,327)				77,293
Increase (Decrease) in Stockholders' Equity
Net (loss)/income		328,870									328,870
Issuance of stock, net of expenses (in shares)								288
Issuance of stock, net of expenses		1,832						$ 3	1,829
Repurchase of shares of common stock (in shares)	[1]							(5,079)
Repurchase of shares of common stock	[1]	(86,393)						$ (50)	(86,343)
Equity based compensation expense		9,038							9,038
Change in accrued dividends attributable to stock-based awards		(837)							(559)		(278)
Dividends declared on common stock		(169,275)									(169,275)
Dividends declared on preferred stock		(32,875)		(17,875)	(15,000)								(17,875)	(15,000)
Dividends attributable to dividend equivalents		(599)									(599)
Change in unrealized losses on securities, net		(32,774)													(32,774)
Changes in fair value of financing agreements at fair value due to changes in instrument-specific credit risk		1,059													1,059
Balance (in shares) at Dec. 31, 2021						11,000	8,000	108,138
Ending balance at Dec. 31, 2021		2,542,848				$ 110	$ 80	$ 1,082	3,775,482		(1,279,484)				45,578
Increase (Decrease) in Stockholders' Equity
Net (loss)/income		(231,581)									(231,581)
Issuance of stock, net of expenses (in shares)								197
Issuance of stock, net of expenses		1,098						$ 1	1,097
Repurchase of shares of common stock (in shares)	[1]							(6,533)
Repurchase of shares of common stock	[1]	(103,253)						$ (65)	(103,188)
Equity based compensation expense		11,335							11,335
Change in accrued dividends attributable to stock-based awards		(2,432)							(435)		(1,997)
Dividends declared on common stock		(171,426)									(171,426)
Dividends declared on preferred stock		(32,875)		$ (17,875)	$ (15,000)								$ (17,875)	$ (15,000)
Dividends attributable to dividend equivalents		(628)									(628)
Change in unrealized losses on securities, net		(25,492)													(25,492)
Changes in fair value of financing agreements at fair value due to changes in instrument-specific credit risk		1,255													1,255
Balance (in shares) at Dec. 31, 2022						11,000	8,000	101,802
Ending balance at Dec. 31, 2022		$ 1,988,849				$ 110	$ 80	$ 1,018	$ 3,684,291		$ (1,717,991)				$ 21,341

[1] For the year ended December 31, 2022, includes approximately $1.0 million (56,690 shares) surrendered for tax purposes related to equity-based compensation awards. For the year ended December 31, 2021, includes approximately $799,000 (53,281 shares) surrendered for tax purposes related to equity-based compensation awards. For the year ended December 31, 2020, includes approximately $2.7 million (90,134 shares) surrendered for tax purposes related to equity-based compensation awards.