CONSOLIDATED STATEMENTS OF STOCKHOLDERS' EQUITY - USD ($) shares in Thousands, $ in Thousands	Common Stock Shares Outstanding	Common Stock	Additional Paid-In Capital	Accum. Other Comp. Income Gain (Loss) Agency MBS	Accum. Other Comp. Income gain (Loss) Non-Agency MBS	Accum. Other Comp. Income Gain (Loss) Derivatives	Accum. (Deficit) Series A Preferred Stock	Accum. (Deficit) Series B Preferred Stock	Accum. (Deficit) Series C Preferred Stock	Accum. (Deficit)	Series A Preferred Stock Shares Outstanding	Series C Preferred Stock Shares Outstanding	Series A Preferred Stock	Series B Preferred Stock	Series C Preferred Stock	Total
Beginning Balance at Dec. 31, 2018		$ 985	$ 981,964	$ (28,824)	$ 9,563	$ (11,531)				$ (485,988)			$ 46,537		$ 48,944	$ 561,650
Beginning Balance (in shares) at Dec. 31, 2018	98,483										1,919	2,010
Issuance of stock		1	355													356
Issuance of stock (in shares)	82
Other comprehensive income, fair value adjustments and reclassifications				31,278	8,165	1,003										40,446
Net (loss) income										(19,970)						(19,970)
Amortization of restricted stock			25													25
Dividends declared preferred stock							$ (1,035)	$ (304)	$ (958)				(1,035)	$ (304)	(958)	(2,297)
Dividend declared per common share										(12,815)						(12,815)
Ending Balance at Mar. 31, 2019		986	982,344	2,454	17,728	(10,528)				(521,070)			46,537		48,944	567,395
Ending Balance (in shares) at Mar. 31, 2019	98,565										1,919	2,010
Cumulative adjustment for adoption of ASC 326										(30)						(30)
Balance including adjustment at January 1, 2020		988	983,401	43,590	30,034	(7,640)				(593,069)			46,537		48,626	552,467
Beginning Balance at Dec. 31, 2019		988	983,401	43,590	30,034	(7,640)				(593,039)			46,537		48,626	552,497
Beginning Balance (in shares) at Dec. 31, 2019	98,849										1,919	2,010
Issuance of stock		1	264													265
Issuance of stock (in shares)	87
Other comprehensive income, fair value adjustments and reclassifications				29,121	$ (30,034)	889										(24)
Net (loss) income										(185,821)						(185,821)
Amortization of restricted stock			4													4
Dividends declared preferred stock							$ (1,035)	$ (304)	$ (958)				(1,035)	$ (304)	(958)	(2,297)
Ending Balance at Mar. 31, 2020		$ 989	$ 983,669	$ 72,711		$ (6,751)				$ (781,187)			$ 46,537		$ 48,626	$ 364,594
Ending Balance (in shares) at Mar. 31, 2020	98,936										1,919	2,010