| Summary of Changes in Stockholders' Equity | 
 The following table summarizes the changes in our equity for the three months ended March 31, 2021 and 2020 (in thousands): 
  
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Three Months Ended March 31, | 
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2021 | 
2020 | 
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| Senior Common Stock | 
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| Balance, beginning of period | 
$ | 
1  | 
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$ | 
1  | 
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| Issuance of senior common stock, net | 
—  | 
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—  | 
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| Balance, end of period | 
$ | 
1  | 
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$ | 
1  | 
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| Common Stock | 
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| Balance, beginning of period | 
$ | 
35  | 
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$ | 
32  | 
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| Issuance of common stock, net | 
1  | 
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2  | 
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| Balance, end of period | 
$ | 
36  | 
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$ | 
34  | 
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| Series F Preferred Stock (1) | 
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| Balance, beginning of period | 
$ | 
—  | 
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$ | 
—  | 
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| Issuance of Series F Preferred Stock, net | 
—  | 
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—  | 
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| Balance, end of period | 
$ | 
—  | 
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$ | 
—  | 
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| Additional Paid in Capital | 
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| Balance, beginning of period | 
$ | 
626,533  | 
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$ | 
571,205  | 
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| Issuance of common stock and Series F Preferred Stock, net (1) | 
11,312  | 
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27,930  | 
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| Redemption of OP Units | 
4,812  | 
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—  | 
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| Adjustment to OP Units held by Non-controlling OP Unitholders resulting from changes in ownership of the Operating Partnership | 
(3,604) | 
 | 
97  | 
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| Balance, end of period | 
$ | 
639,053  | 
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$ | 
599,232  | 
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| Accumulated Other Comprehensive Income | 
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| Balance, beginning of period | 
$ | 
(4,345) | 
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$ | 
(2,126) | 
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| Comprehensive income | 
2,424  | 
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(2,528) | 
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| Balance, end of period | 
$ | 
(1,921) | 
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$ | 
(4,654) | 
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| Distributions in Excess of Accumulated Earnings | 
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| Balance, beginning of period | 
$ | 
(409,041) | 
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$ | 
(360,978) | 
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| Distributions declared to common, senior common, and preferred stockholders | 
(16,460) | 
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(15,548) | 
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| Net income attributable to the Company | 
79  | 
 | 
2,267  | 
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| Balance, end of period | 
$ | 
(425,422) | 
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$ | 
(374,259) | 
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| Total Stockholders' Equity | 
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| Balance, beginning of period | 
$ | 
213,183  | 
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$ | 
208,134  | 
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| Issuance of common stock and Series F Preferred Stock, net (1) | 
11,313  | 
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27,932  | 
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| Redemption of OP Units | 
4,812  | 
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—  | 
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| Distributions declared to common, senior common, and preferred stockholders | 
(16,460) | 
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(15,548) | 
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| Comprehensive income | 
2,424  | 
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(2,528) | 
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| Adjustment to OP Units held by Non-controlling OP Unitholders resulting from changes in ownership of the Operating Partnership | 
(3,604) | 
 | 
97  | 
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| Net income attributable to the Company | 
79  | 
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2,267  | 
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| Balance, end of period | 
$ | 
211,747  | 
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$ | 
220,354  | 
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| Non-Controlling Interest | 
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| Balance, beginning of period | 
$ | 
2,854  | 
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$ | 
2,903  | 
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| Distributions declared to Non-controlling OP Unit holders | 
(189) | 
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(189) | 
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| Issuance of Non-controlling OP Units as consideration in real estate acquisitions, net | 
—  | 
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502  | 
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| Redemptions of OP Units | 
(4,812) | 
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—  | 
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| Adjustment to OP Units held by Non-controlling OP Unitholders resulting from changes in ownership of the Operating Partnership | 
3,604  | 
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(97) | 
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| Net loss attributable to OP units held by Non-controlling OP Unitholders | 
(41) | 
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(9) | 
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| Balance, end of period | 
$ | 
1,416  | 
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$ | 
3,110  | 
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| Total Equity | 
$ | 
213,163  | 
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$ | 
223,464  | 
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(1)No shares of Series F Preferred Stock were outstanding prior to July 1, 2020.
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