Per Unit Data of HTALP (Details) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended				6 Months Ended
		Jun. 30, 2020 USD ($) $ / shares shares	Mar. 31, 2020 USD ($)	Jun. 30, 2019 USD ($) $ / shares shares	Mar. 31, 2019 USD ($)	Jun. 30, 2020 USD ($) Arrangement $ / shares shares	Jun. 30, 2019 USD ($) $ / shares shares
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) | shares		218,483		205,108		217,588	205,094
Dilutive shares - partnership units convertible into common stock (in shares) | shares		3,605		3,897		3,640	3,908
Adjusted weighted average number of shares/units outstanding — diluted (in shares) | shares		222,088		209,005		221,228	209,002
Earnings per common unit - basic:
Net income attributable to common stockholders/unitholders (in dollars per share) | $ / shares		$ 0.06		$ 0.08		$ 0.14	$ 0.14
Earnings per common unit - diluted:
Net income attributable to common stockholders/unitholders (in dollars per share) | $ / shares		0.06		$ 0.08		$ 0.14	$ 0.14
Forward Sale Arrangements
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Number of arrangements | Arrangement						4
Anticipated proceeds of share issuance						$ 277,500
Forward Sale Arrangement Maturing in Late 2020
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Number of arrangements | Arrangement						3
Forward Sale Arrangements Maturing in 2021
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Number of arrangements | Arrangement						1
Common Stock | ATM Offering Program
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Issuance of common stock, net (in shares) | shares						1,700
Proceeds from sale of stock						$ 50,000
Net price per share (in dollars per share) | $ / shares		$ 29.86				$ 29.86
Healthcare Trust of America Holdings, LP (HTALP)
Numerator:
Net income		$ 13,725		$ 16,598		$ 31,933	$ 30,299
Net income attributable to noncontrolling interests		0		(38)		0	(66)
Net income attributable to common stockholders/unitholders		$ 13,725	$ 18,208	$ 16,560	$ 13,673	$ 31,933	$ 30,233
Denominator:
Weighted average shares/units outstanding - basic (in shares) | shares		222,088		209,005		221,228	209,002
Dilutive shares - partnership units convertible into common stock (in shares) | shares		0		0		0	0
Adjusted weighted average number of shares/units outstanding — diluted (in shares) | shares		222,088		209,005		221,228	209,002
Earnings per common unit - basic:
Net income attributable to common stockholders/unitholders (in dollars per share) | $ / shares		$ 0.06		$ 0.08		$ 0.14	$ 0.14
Earnings per common unit - diluted:
Net income attributable to common stockholders/unitholders (in dollars per share) | $ / shares		$ 0.06		$ 0.08		$ 0.14	$ 0.14

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