Per Unit Data of HTALP (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		1 Months Ended		3 Months Ended						9 Months Ended
		Oct. 29, 2019	Jun. 30, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018	Sep. 30, 2019	Sep. 30, 2018
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Forward equity agreement, shares to be sold (in shares)			1,800
Numerator:
Net (loss) income				$ (8,577)			$ 176,348			$ 21,722	$ 202,021
Net income attributable to noncontrolling interests	[1]			114			(3,362)			(486)	(3,887)
Net (loss) income attributable to common stockholders/unitholders				$ (8,463)			$ 172,986			$ 21,236	$ 198,134
Denominator:
Weighted average shares/units outstanding - basic (in shares)				205,277			207,513			205,156	205,950
Dilutive units - partnership units convertible into common units (in shares)				0			3,931			3,870	4,018
Adjusted weighted average number of shares/units outstanding — diluted (in shares)				205,277			211,444			209,026	209,968
Earnings per common unit - basic:
Net (loss) income attributable to common stockholders/unitholders (in dollars per share)				$ (0.04)			$ 0.83			$ 0.10	$ 0.96
Earnings per common unit - diluted:
Net (loss) income attributable to common stockholders/unitholders (in dollars per share)				$ (0.04)			$ 0.82			$ 0.10	$ 0.94
Subsequent Event
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Forward equity agreement, shares to be sold (in shares)		6,000
HTA, Inc. | Subsequent Event
Subsidiary of Limited Liability Company or Limited Partnership [Line Items]
Forward equity agreement, shares to be sold (in shares)		6,000
Healthcare Trust of America Holdings, LP (HTALP)
Numerator:
Net (loss) income				$ (8,577)			$ 176,348			$ 21,722	$ 202,021
Net income attributable to noncontrolling interests				0			(18)			(66)	(65)
Net (loss) income attributable to common stockholders/unitholders				$ (8,577)	$ 16,560	$ 13,673	$ 176,330	$ 15,643	$ 9,983	$ 21,656	$ 201,956
Denominator:
Weighted average shares/units outstanding - basic (in shares)				209,164			211,444			209,056	209,968
Dilutive units - partnership units convertible into common units (in shares)				0			0			0	0
Adjusted weighted average number of shares/units outstanding — diluted (in shares)				209,164			211,444			209,056	209,968
Earnings per common unit - basic:
Net (loss) income attributable to common stockholders/unitholders (in dollars per share)				$ (0.04)			$ 0.83			$ 0.10	$ 0.96
Earnings per common unit - diluted:
Net (loss) income attributable to common stockholders/unitholders (in dollars per share)				$ (0.04)			$ 0.83			$ 0.10	$ 0.96

[1] Includes amounts attributable to redeemable noncontrolling interests.