Income (Loss) Per Share (Antidilutive) (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2021	Sep. 30, 2020	Sep. 30, 2021	Sep. 30, 2020
Net income (loss) allocated to common stockholders is not adjusted for:
Loss on extinguishment of preferred stock - Series B	$ 111	$ 0	$ 4,595	$ 0
Total	$ 1,801	$ (652)	$ 7,204	$ (4,847)
Weighted average diluted shares are not adjusted for:
Antidilutive securities excluded (in shares)	24,109	10,870	16,883	10,984
Series E Preferred Stock
Net income (loss) allocated to common stockholders is not adjusted for:
Dividends on preferred stock	$ 90		$ 90
Series M Preferred Stock
Net income (loss) allocated to common stockholders is not adjusted for:
Dividends on preferred stock	$ 4		$ 4
Restricted Stock
Weighted average diluted shares are not adjusted for:
Antidilutive securities excluded (in shares)	89	0	100	25
Operating Partnership Units
Net income (loss) allocated to common stockholders is not adjusted for:
Income (loss) attributable to redeemable noncontrolling interests in operating partnership	$ (823)	$ (2,381)	$ (3,184)	$ (10,036)
Weighted average diluted shares are not adjusted for:
Antidilutive securities excluded (in shares)	5,564	3,863	4,543	3,940
Equity Unit Purchase Agreements \| Series B Preferred Stock
Net income (loss) allocated to common stockholders is not adjusted for:
Dividends on preferred stock	$ 1,058	$ 1,729	$ 3,689	$ 5,189
Weighted average diluted shares are not adjusted for:
Antidilutive securities excluded (in shares)	4,115	6,728	4,781	6,728
Equity Unit Purchase Agreements \| Series E Preferred Stock
Net income (loss) allocated to common stockholders is not adjusted for:
Dividends on preferred stock	$ 90	$ 0	$ 90	$ 0
Weighted average diluted shares are not adjusted for:
Antidilutive securities excluded (in shares)	700	0	233	0
Equity Unit Purchase Agreements \| Series M Preferred Stock
Net income (loss) allocated to common stockholders is not adjusted for:
Dividends on preferred stock	$ 4	$ 0	$ 4	$ 0
Weighted average diluted shares are not adjusted for:
Antidilutive securities excluded (in shares)	32	0	11	0
Series B Preferred Stock
Net income (loss) allocated to common stockholders is not adjusted for:
Loss on extinguishment of preferred stock - Series B	$ 111	$ 0	$ 4,595	$ 0
Exchanged Shares of Series B Preferred Stock
Weighted average diluted shares are not adjusted for:
Antidilutive securities excluded (in shares)	0	269	485	288
Contingently Issuable Shares
Weighted average diluted shares are not adjusted for:
Antidilutive securities excluded (in shares)	0	10	0	3
Convertible Senior Notes
Net income (loss) allocated to common stockholders is not adjusted for:
Interest expense on Convertible Senior Notes	$ 1,361	$ 0	$ 2,010	$ 0
Weighted average diluted shares are not adjusted for:
Antidilutive securities excluded (in shares)	13,609	0	6,730	0

Loss attributable to redeemable noncontrolling interests in operating partnership.

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Gain (Loss) On Extinguishment Of Preferred Stock

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Net Income (Loss) Attributable To Antidilutive Securities

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Securities (including those issuable pursuant to contingent stock agreements) that could potentially dilute basic earnings per share (EPS) or earnings per unit (EPU) in the future that were not included in the computation of diluted EPS or EPU because to do so would increase EPS or EPU amounts or decrease loss per share or unit amounts for the period presented.

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Amount, after tax, of interest recognized on convertible debt instrument excluding interest on principal required to be paid in cash.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
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