CONSOLIDATED STATEMENTS OF CHANGES IN STOCKHOLDERS' EQUITY - USD ($) $ in Thousands	Total	Common Stock Par Value	Additional Paid-in Capital	Accumulated Other Comprehensive Income	Cumulative Earnings	Cumulative Distributions to Stockholders	Series A Preferred Stock Par Value	Series A Preferred Stock Par Value Preferred Stock	Series B Preferred Stock Par Value	Series B Preferred Stock Par Value Preferred Stock	Series C Preferred Stock Par Value	Series C Preferred Stock Par Value Preferred Stock	Series D Preferred Stock Par Value	Series D Preferred Stock Par Value Preferred Stock
Beginning Balance at Dec. 31, 2019	$ 3,953,293	$ 1,873	$ 4,275,963	$ 708,336	$ 3,793,040	$ (4,826,291)		$ 58		$ 130		$ 104		$ 80
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	(58,381)				(58,381)
Other comprehensive income (loss)	(153,355)			(153,355)
Repurchase of common stock	(22,066)	(15)	(22,051)
Settlement of convertible debt	294,009	463	293,546
Purchase of capped call	(33,750)		(33,750)
Stock based compensation	4,112	1	4,111
Common dividends declared	(232,007)					(232,007)
Preferred dividends declared	(55,313)					(55,313)	$ (9,000)		$ (20,000)		$ (15,000)		$ (12,000)
Ending Balance at Sep. 30, 2020	3,696,542	2,322	4,517,819	554,981	3,734,659	(5,113,611)		58		130		104		80
Beginning Balance at Jun. 30, 2020	3,395,879	2,320	4,515,043	537,510	3,367,330	(5,026,696)		58		130		104		80
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	367,329				367,329
Other comprehensive income (loss)	17,471			17,471
Settlement of convertible debt	1,200	2	1,198
Stock based compensation	1,578		1,578
Common dividends declared	(68,477)					(68,477)
Preferred dividends declared	(18,438)					(18,438)	(3,000)		(7,000)		(5,000)		(4,000)
Ending Balance at Sep. 30, 2020	3,696,542	2,322	4,517,819	554,981	3,734,659	(5,113,611)		58		130		104		80
Beginning Balance at Dec. 31, 2020	3,779,386	2,306	4,538,029	558,096	3,881,894	(5,201,311)		58		130		104		80
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	652,380				652,380
Other comprehensive income (loss)	(119,181)			(119,181)
Repurchase of common stock	(1,828)	(2)	(1,826)
Settlement of warrants	(220,945)		(220,945)
Settlement of convertible debt	37,340	58	37,282
Stock based compensation	4,993	7	4,986
Common dividends declared	(228,284)					(228,284)
Preferred dividends declared	(55,313)					(55,313)	(9,000)		(20,000)		(15,000)		(12,000)
Ending Balance at Sep. 30, 2021	3,848,548	2,369	4,357,526	438,915	4,534,274	(5,484,908)		58		130		104		80
Beginning Balance at Jun. 30, 2021	3,627,431	2,356	4,352,986	456,113	4,202,806	(5,387,202)		58		130		104		80
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Net income (loss)	331,468				331,468
Other comprehensive income (loss)	(17,198)			(17,198)
Settlement of convertible debt	5,526	8	5,518
Stock based compensation	(973)	5	(978)
Common dividends declared	(79,268)					(79,268)
Preferred dividends declared	(18,438)					(18,438)	$ (3,000)		$ (7,000)		$ (5,000)		$ (4,000)
Ending Balance at Sep. 30, 2021	$ 3,848,548	$ 2,369	$ 4,357,526	$ 438,915	$ 4,534,274	$ (5,484,908)		$ 58		$ 130		$ 104		$ 80