Cover Page - shares	3 Months Ended
	Mar. 31, 2020	May 08, 2020
Cover [Abstract]
Document Type	10-Q
Document Quarterly Report	true
Document Period End Date	Mar. 31, 2020
Document Transition Report	false
Entity File Number	000-55201
Entity Registrant Name	Healthcare Trust, Inc.
Entity Incorporation, State or Country Code	MD
Entity Tax Identification Number	38-3888962
Entity Address, Address Line One	650 Fifth Ave.
Entity Address, Address Line Two	30th Floor
Entity Address, City or Town	New York
Entity Address, State or Province	NY
Entity Address, Postal Zip Code	10019
City Area Code	212
Local Phone Number	415-6500
Title of 12(b) Security	7.375% Series A Cumulative Redeemable Perpetual Preferred Stock, $0.01 par value per share
Trading Symbol	HTIA
Security Exchange Name	NASDAQ
Entity Current Reporting Status	Yes
Entity Interactive Data Current	Yes
Entity Filer Category	Non-accelerated Filer
Entity Small Business	false
Entity Emerging Growth Company	false
Entity Shell Company	false
Entity Common Stock, Shares Outstanding		92,264,102
Entity Central Index Key	0001561032
Current Fiscal Year End Date	--12-31
Document Fiscal Year Focus	2020
Document Fiscal Period Focus	Q1
Amendment Flag	false