Consolidated Statements of Shareholders' Equity Statement - USD ($) $ in Thousands	Total	Cumulative Effect, Period of Adoption, Adjustment	Cumulative Effect, Period of Adoption, Adjusted Balance	Preferred Stock	Preferred Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Preferred Stock Including Additional Paid in Capital	Preferred Stock Including Additional Paid in Capital Cumulative Effect, Period of Adoption, Adjusted Balance	Common Stock	Common Stock Cumulative Effect, Period of Adoption, Adjusted Balance	Additional Paid-in Capital	Additional Paid-in Capital Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Other Comprehensive Income (Loss)	Accumulated Other Comprehensive Income (Loss) Cumulative Effect, Period of Adoption, Adjusted Balance	Accumulated Deficit	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjustment	Accumulated Deficit Cumulative Effect, Period of Adoption, Adjusted Balance
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of adoption accounting standard 2019-05	$ 582,988	$ (548)	$ 582,440			$ 162,807	$ 162,807	$ 229	$ 229	$ 858,347	$ 858,347	$ 173,806	$ 173,806	$ (612,201)	$ (548)	$ (612,749)
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, shares				4,460,000
Stock Redeemed or Called During Period, Shares				(4,000,000)
Restricted stock granted, net of amortization								67,511
Stock Repurchased During Period, Shares								(18,782)
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation								(12,744)
Balance, Preferred shares outstanding at Mar. 31, 2020				7,248,330
Balance, Common shares outstanding at Mar. 31, 2020								22,981,978
Balance at Dec. 31, 2019	582,988	(548)	582,440			162,807	162,807	$ 229	$ 229	858,347	858,347	173,806	173,806	(612,201)	(548)	(612,749)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of adoption accounting standard 2019-05	550,607	(548)	582,440			174,709	162,807	230	229	858,203	858,347	246,778	173,806	(729,313)	(548)	(612,749)
Balance at Dec. 31, 2019	(582,988)	$ 548	$ (582,440)			(162,807)	$ (162,807)	(229)	$ (229)	(858,347)	$ (858,347)	(173,806)	$ (173,806)	612,201	$ 548	$ 612,749
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issuance, value	107,988					107,988
Stock Redeemed or Called During Period, Value	(100,000)					(96,086)
Preferred stock redemption charge	(3,914)													(3,914)
Restricted stock granted, net of amortization	307							1		306
Stock Repurchased During Period, Value	(206)							0		(206)
Adjustments for tax withholding on share-based compensation	(235)							0		(235)
Stock issuance costs	(9)									(9)
Net income (loss)	(98,479)													(98,479)
Dividends on preferred stock	(3,841)													(3,841)
Dividends on common stock	(10,330)													(10,330)
Other Comprehensive Income (Loss), Net of Tax	72,972											72,972
Balance at Mar. 31, 2020	550,607					174,709		230		858,203		246,778		(729,313)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of adoption accounting standard 2019-05	550,607					174,709		230		858,203		246,778		(729,313)
Cumulative effect of adoption accounting standard 2019-05	$ 633,453					174,564		$ 237		869,495		80,261		(491,104)
Balance, Preferred shares outstanding at Dec. 31, 2020	7,248,330			7,248,330
Balance, Common shares outstanding at Dec. 31, 2020	23,697,970							23,697,970
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issuance, shares								7,187,500
Stock Redeemed or Called During Period, Shares				(2,788,330)
Restricted stock granted, net of amortization								16,722
Share-based Payment Arrangement, Shares Withheld for Tax Withholding Obligation								(22,623)
Balance, Preferred shares outstanding at Mar. 31, 2021	4,460,000			4,460,000
Balance, Common shares outstanding at Mar. 31, 2021	30,879,569							30,879,569
Balance at Dec. 31, 2020	$ 633,453					174,564		$ 237		869,495		80,261		(491,104)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of adoption accounting standard 2019-05	633,453					107,843		309		997,326		15,105		(389,307)
Balance at Dec. 31, 2020	(633,453)					(174,564)		(237)		(869,495)		(80,261)		491,104
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Stock issuance, value	128,150							72		128,078
Stock Redeemed or Called During Period, Value	(69,708)					(66,721)
Preferred stock redemption charge	(2,987)													(2,987)
Restricted stock granted, net of amortization	451							0		451
Adjustments for tax withholding on share-based compensation	(428)							0		(428)
Stock issuance costs	(270)									(270)
Net income (loss)	117,929													117,929
Dividends on preferred stock	(2,559)													(2,559)
Dividends on common stock	(10,586)													(10,586)
Other Comprehensive Income (Loss), Net of Tax	(65,156)											(65,156)
Balance at Mar. 31, 2021	731,276					107,843		309		997,326		15,105		(389,307)
Increase (Decrease) in Stockholders' Equity [Roll Forward]
Cumulative effect of adoption accounting standard 2019-05	$ 731,276					$ 107,843		$ 309		$ 997,326		$ 15,105		$ (389,307)