Net Loss Per Share (Summary of Antidilutive Securities Excluded from Computation of Earnings Per Share) (Details) - shares	12 Months Ended
Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	1,035,915	1,106,284	1,165,647
Limited partner units (in shares)	90	90
Class B units (in shares)	359,250	359,250	359,250
Unvested restricted shares
Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	202,782	273,151	332,514
OP Units
Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	442,014	442,014	442,014
Class B units
Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Line Items]
Antidilutive securities excluded from computation of earnings per share (in shares)	391,119	391,119	391,119
Unvested restricted shares
Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Line Items]
Unvested restricted stock (in shares)	159,427	215,384	277,241
American Realty Capital Healthcare III Advisors, LLC \| Advisor
Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Line Items]
Limited partner units (in shares)	405,998	405,998	405,998

Common Share Equivalents, Shares Outstanding

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Earnings Per Share, Basic and Diluted, by Common Class, Including Two Class Method [Line Items]

+ References

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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=124432515&loc=d3e3550-109257

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- Definition

The number of limited partner units outstanding.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 505
-SubTopic 10
-Section S99
-Paragraph 5
-Subparagraph (SAB Topic 4.F)
-URI http://asc.fasb.org/extlink&oid=120397183&loc=d3e187171-122770

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Number of equity instruments other than options outstanding, including both vested and non-vested instruments.

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 718
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)(1)(ii)
-URI http://asc.fasb.org/extlink&oid=120381028&loc=d3e5070-113901

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