Related Party Transactions and Arrangements (Fees and Participations Paid in Connection with the Liquidation or Listing of the Company's Real Estate Assets) (Details)	3 Months Ended
Mar. 31, 2020 USD ($)
Healthcare Trust Special Limited Partnership, LLC \| Net Sale Proceeds, after Return of Capital Contributions and Annual Targeted Investor Return \| Special Limited Partner
Related Party Transaction [Line Items]
Subordinated performance fee as a percentage of benchmark	15.00%
Healthcare Trust Special Limited Partnership, LLC \| Excess of Adjusted Market Value of Real Estate Assets Plus Distributions Over Aggregate Contributed Investor Capital \| Special Limited Partner
Related Party Transaction [Line Items]
Subordinated incentive listing distribution	15.00%
Distribution upon nonrenewal of advisory agreement	15.00%
Annual Targeted Investor Return \| Healthcare Trust Special Limited Partnership, LLC \| Pre-tax Non-compounded Return on Capital Contribution \| Special Limited Partner
Related Party Transaction [Line Items]
Cumulative capital investment return to investors as a percentage of benchmark	6.00%
Asset management fees
Related Party Transaction [Line Items]
Fee multiplier	4
Change in Control Fee
Related Party Transaction [Line Items]
Fee multiplier	4
Variable Management - Incentive Fee
Related Party Transaction [Line Items]
Fee multiplier	4
Transition Fee
Related Party Transaction [Line Items]
Transaction amount	$ 15,000,000.0
Subject Fees (Transition Fee Not in Excess of the Product)
Related Party Transaction [Line Items]
Fee multiplier	4
Subject Fees (Transition Fee Not in Excess of the Product) \| Maximum
Related Party Transaction [Line Items]
Fee multiplier	4.5

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Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 1
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39549-107864

Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 4
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Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 850
-SubTopic 10
-Section 50
-Paragraph 3
-URI http://asc.fasb.org/extlink&oid=6457730&loc=d3e39603-107864

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