Per Unit Data of HTALP (Details) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended
		Mar. 31, 2020 USD ($) Arrangement $ / shares shares	Mar. 31, 2019 USD ($) $ / shares shares
Numerator:
Net income		$ 18,208	$ 13,701
Net income attributable to noncontrolling interests	[1]	(307)	(261)
Net income attributable to common stockholders/unitholders		$ 17,901	$ 13,440
Denominator:
Weighted average shares/units outstanding - basic (in shares) | shares		216,692	205,080
Dilutive effect of forward equity sales agreement | shares		255	0
Adjusted weighted average number of shares/units outstanding — diluted (in shares) | shares		220,623	208,999
Earnings per common unit - basic:
Net income attributable to common stockholders/unitholders (in dollars per share) | $ / shares		$ 0.08	$ 0.07
Earnings per common unit - diluted:
Net income attributable to common stockholders/unitholders (in dollars per share) | $ / shares		$ 0.08	$ 0.06
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
Healthcare Trust of America Holdings, LP (HTALP)
Numerator:
Net income		$ 18,208	$ 13,701
Net income attributable to noncontrolling interests		0	(28)
Net income attributable to common stockholders/unitholders		$ 18,208	$ 13,673
Denominator:
Weighted average shares/units outstanding - basic (in shares) | shares		220,368	208,999
Dilutive effect of forward equity sales agreement | shares		255	0
Adjusted weighted average number of shares/units outstanding — diluted (in shares) | shares		220,623	208,999
Earnings per common unit - basic:
Net income attributable to common stockholders/unitholders (in dollars per share) | $ / shares		$ 0.08	$ 0.07
Earnings per common unit - diluted:
Net income attributable to common stockholders/unitholders (in dollars per share) | $ / shares		$ 0.08	$ 0.07

[1] Includes amounts attributable to redeemable noncontrolling interests for the three months ended March 31, 2019.