Per Share Data of HTA (Details) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended			6 Months Ended
		Jun. 30, 2020 USD ($) $ / shares shares	Mar. 31, 2020 shares	Jun. 30, 2019 USD ($) $ / shares shares	Jun. 30, 2020 USD ($) Arrangement $ / shares shares	Jun. 30, 2019 USD ($) $ / shares shares
Earnings Per Share
Anti-dilutive securities excluded from calculation (in shares)		1,400			500
Numerator:
Net income | $		$ 13,725		$ 16,598	$ 31,933	$ 30,299
Net income attributable to noncontrolling interests | $	[1]	(236)		(339)	(543)	(600)
Net income attributable to common stockholders/unitholders | $		$ 13,489		$ 16,259	$ 31,390	$ 29,699
Denominator:
Weighted average shares/units outstanding - basic (in shares)		218,483		205,108	217,588	205,094
Dilutive shares - partnership units convertible into common stock (in shares)		3,605		3,897	3,640	3,908
Adjusted weighted average number of shares/units outstanding — diluted (in shares)		222,088		209,005	221,228	209,002
Earnings per common share - basic
Net income attributable to common stockholders/unitholders (in dollars per share) | $ / shares		$ 0.06		$ 0.08	$ 0.14	$ 0.14
Earnings per common share - diluted
Net income attributable to common stockholders/unitholders (in dollars per share) | $ / shares		0.06		$ 0.08	$ 0.14	$ 0.14
Common Stock
Earnings Per Share
Issuance of common stock, net (in shares)			1,675
Forward Sale Arrangements
Earnings Per Share
Number of arrangements | Arrangement					4
Anticipated proceeds of share issuance | $					$ 277,500
Average price of shares issued (in dollars per share) | $ / shares		$ 29.46			$ 29.46
Forward Sale Arrangement Maturing in Late 2020
Earnings Per Share
Number of arrangements | Arrangement					3
Forward Sale Arrangements Maturing in 2021
Earnings Per Share
Number of arrangements | Arrangement					1

[1] Includes amounts attributable to redeemable noncontrolling interests for the three and six months ended June 30, 2019.