Income (Loss) Per Share (Antidilutive) (Details) - USD ($) shares in Thousands, $ in Thousands	3 Months Ended	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019	Sep. 30, 2020	Sep. 30, 2019
Net income (loss) allocated to common stockholders is not adjusted for:
Total	$ (652)	$ 405	$ (4,847)	$ 2,848
Weighted average diluted shares are not adjusted for:
Antidilutive securities excluded (in shares)	10,870	10,988	10,984	11,130
Restricted Stock
Net income (loss) allocated to common stockholders is not adjusted for:
Income (loss) allocated to unvested shares	$ 0	$ 88	$ 0	$ 272
Weighted average diluted shares are not adjusted for:
Antidilutive securities excluded (in shares)	0	19	25	53
Performance Shares
Net income (loss) allocated to common stockholders is not adjusted for:
Income (loss) allocated to unvested shares	$ 0	$ 74	$ 0	$ 224
Weighted average diluted shares are not adjusted for:
Antidilutive securities excluded (in shares)	0	165	0	206
Operating Partnership Units
Net income (loss) allocated to common stockholders is not adjusted for:
Income (loss) attributable to redeemable noncontrolling interests in operating partnership	$ (2,381)	$ (1,465)	$ (10,036)	$ (2,770)
Weighted average diluted shares are not adjusted for:
Antidilutive securities excluded (in shares)	3,863	4,162	3,940	4,229
Series B Preferred Stock
Net income (loss) allocated to common stockholders is not adjusted for:
Dividends on preferred stock - Series B	$ 1,729	$ 1,708	$ 5,189	$ 5,122
Weighted average diluted shares are not adjusted for:
Antidilutive securities excluded (in shares)	6,728	6,569	6,728	6,569
Advisory Services Incentive Fee Shares
Weighted average diluted shares are not adjusted for:
Antidilutive securities excluded (in shares)	269	73	288	73
Contingently Issuable Shares
Weighted average diluted shares are not adjusted for:
Antidilutive securities excluded (in shares)	10		3

Loss attributable to redeemable noncontrolling interests in operating partnership.

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Income (Loss) Allocated To Unvested Shares

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- Definition

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.

+ References

Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

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- Definition

The aggregate value of preferred stock dividends and other adjustments necessary to derive net income apportioned to common stockholders.

+ References

Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (b)
-URI http://asc.fasb.org/extlink&oid=6371337&loc=d3e3550-109257

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 260
-SubTopic 10
-Section 45
-Paragraph 11
-URI http://asc.fasb.org/extlink&oid=121326447&loc=d3e1377-109256

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