Investments in Real Estate - Acquisitions (Details) - USD ($) $ in Thousands	9 Months Ended
Sep. 30, 2020	Sep. 30, 2019
Investments [Abstract]
Aggregate purchase price	$ 52,887	$ 229,851
Closing costs	$ 300

Asset Acquisition, Recognized Identifiable Assets Acquired and Liabilities Assumed, Including Other, Net

No definition available.

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Namespace Prefix:	hta_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant