Consolidated Statements of Shareholders' Equity Statement - USD ($) $ in Thousands	Total	Preferred Stock	Preferred Stock Including Additional Paid in Capital	Common Stock	Additional Paid-in Capital	Accumulated Other Comprehensive Income (Loss)	Accumulated Deficit
Balance, Preferred shares outstanding at Dec. 31, 2016		4,571,937
Balance, Common shares outstanding at Dec. 31, 2016				16,384,488
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issuance, shares		1,316,743		2,205,829
Restricted stock granted, net of amortization				46,056
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation				25,857
Balance, Preferred shares outstanding at Dec. 31, 2017		5,888,680
Balance, Common shares outstanding at Dec. 31, 2017				18,610,516
Balance at Dec. 31, 2016	$ 467,184		$ 110,005	$ 164	$ 727,697	$ (32,609)	$ (338,073)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issuance, value	78,532		31,350	22	47,160
Restricted stock granted, net of amortization	1,954			0	1,954
Adjustments for tax withholding on share-based compensation	(521)			0	(521)
Stock issuance costs	(106)		(61)		(45)
Net (loss) income	33,893						33,893
Dividends on preferred stock	(10,794)						(10,794)
Dividends on common stock	(36,996)						(36,996)
Other Comprehensive Income (Loss), Net of Tax	23,912					23,912
Balance at Dec. 31, 2017	$ 557,058		141,294	$ 186	776,245	(8,697)	(351,970)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issuance, shares		65,914		2,276,549
Restricted stock granted, net of amortization				71,053
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation				19,045
Balance, Preferred shares outstanding at Dec. 31, 2018	5,954,594	5,954,594
Balance, Common shares outstanding at Dec. 31, 2018	20,939,073			20,939,073
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issuance, value	$ 43,457		1,599	$ 22	41,836
Restricted stock granted, net of amortization	1,230			1	1,229
Adjustments for tax withholding on share-based compensation	(364)			0	(364)
Stock issuance costs	(95)		(10)		(85)
Net (loss) income	7,023						7,023
Dividends on preferred stock	(11,801)						(11,801)
Dividends on common stock	(42,273)						(42,273)
Other Comprehensive Income (Loss), Net of Tax	(27,082)					(27,082)
Balance at Dec. 31, 2018	$ 527,153		142,883	$ 209	818,861	(35,779)	(399,021)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issuance, shares		833,736		3,664,418
Restricted stock granted, net of amortization				68,004
Stock Repurchased During Period, Shares				(1,709,271)
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation				16,231
Balance, Preferred shares outstanding at Dec. 31, 2019	6,788,330	6,788,330
Balance, Common shares outstanding at Dec. 31, 2019	22,945,993			22,945,993
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issuance, value	$ 83,812		19,924	$ 36	63,852
Restricted stock granted, net of amortization	1,206			1	1,205
Stock Repurchased During Period, Value	(25,034)			17	25,017
Adjustments for tax withholding on share-based compensation	(296)			0	(296)
Stock issuance costs	(258)				(258)
Net (loss) income	(152,668)						(152,668)
Dividends on preferred stock	(12,967)						(12,967)
Dividends on common stock	(47,545)						(47,545)
Other Comprehensive Income (Loss), Net of Tax	209,585					209,585
Balance at Dec. 31, 2019	$ 582,988		$ 162,807	$ 229	$ 858,347	$ 173,806	$ (612,201)