Per Unit Data of HTALP (Details) - USD ($) $ / shares in Units, shares in Thousands, $ in Thousands		3 Months Ended								12 Months Ended
		Dec. 31, 2015	Sep. 30, 2015	Jun. 30, 2015	Mar. 31, 2015	Dec. 31, 2014	Sep. 30, 2014	Jun. 30, 2014	Mar. 31, 2014	Dec. 31, 2015	Dec. 31, 2014	Dec. 31, 2013
Numerator:
Net income										$ 33,557	$ 45,994	$ 24,684
Net income attributable to noncontrolling interests	[1]									(626)	(623)	(423)
Net income attributable to common stockholders/unitholders										$ 32,931	$ 45,371	$ 24,261
Denominator:
Weighted average units outstanding - basic										126,074	119,904	114,038	[2]
Weighted average number of shares/units outstanding — diluted										128,004	121,168	114,970	[2]
Earnings per common unit - basic:
Net income attributable to common unitholders (usd per share)										$ 0.26	$ 0.38	$ 0.21	[2]
Earnings per common unit - diluted:
Net income attributable to common unitholders (usd per share)										$ 0.26	$ 0.37	$ 0.21	[2]
Healthcare Trust of America Holdings, LP (HTALP)
Numerator:
Net income		$ 10,573	$ 6,554	$ 9,488	$ 6,942	$ 21,457	$ 16,220	$ 2,883	$ 5,434	$ 33,557	$ 45,994	$ 24,684
Net income attributable to noncontrolling interests										(112)	(133)	(51)
Net income attributable to common stockholders/unitholders		$ 10,538	$ 6,534	$ 9,464	$ 6,909	$ 21,430	$ 16,192	$ 2,843	$ 5,396	$ 33,445	$ 45,861	$ 24,633
Denominator:
Weighted average units outstanding - basic										128,079	121,340	115,565	[2]
Dilutive units										0	0	0	[2]
Weighted average number of shares/units outstanding — diluted										128,079	121,340	115,565	[2]
Earnings per common unit - basic:
Net income attributable to common unitholders (usd per share)		$ 0.08	$ 0.05	$ 0.07	$ 0.05	$ 0.17	$ 0.13	$ 0.02	$ 0.04	$ 0.26	$ 0.38	$ 0.21	[2]
Earnings per common unit - diluted:
Net income attributable to common unitholders (usd per share)		$ 0.08	$ 0.05	$ 0.07	$ 0.05	$ 0.17	$ 0.13	$ 0.02	$ 0.04	$ 0.26	$ 0.38	$ 0.21	[2]

[1] Includes amounts attributable to redeemable noncontrolling interests.

[2] For the year ended December 31, 2013, amounts have been adjusted retroactively to reflect the Reverse Stock Split effected on December 15, 2014.