Condensed Consolidated Statements of Changes In Partners' Capital (Unaudited) - USD ($) shares in Thousands, $ in Thousands		Total	Healthcare Trust of America Holdings, LP (HTALP)	Healthcare Trust of America Holdings, LP (HTALP) General Partner' Capital	Healthcare Trust of America Holdings, LP (HTALP) Limited Partners' Capital
Balance as of beginning of period (in units) at Dec. 31, 2013	[1]			118,440	1,527
Balance as of beginning of period at Dec. 31, 2013			$ 1,401,294	$ 1,387,476	$ 13,818
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of general partner units (in units)	[1]			771
Issuance of general partner units			17,742	$ 17,742
Share-based award transactions, net (in units)	[1]			254	(3)
Share-based award transactions, net			3,279	$ 3,279
Redemptions of general partner units (in units)	[1]			(29)
Redemptions of general partner units			(572)	$ (572)
Redemption of limited partner units (in units)	[1]			36	(37)
Redemption of limited partner units			0	$ 362	$ (362)
Distributions			(104,019)	(103,097)	(922)
Net income		$ 24,179	24,431	$ 24,179	$ 252
Balance as of end of period (in units) at Sep. 30, 2014	[1]			119,472	1,487
Balance as of end of period at Sep. 30, 2014			1,342,155	$ 1,329,369	$ 12,786
Balance as of beginning of period (in units) at Dec. 31, 2014				125,087	2,155
Balance as of beginning of period at Dec. 31, 2014			1,476,421	$ 1,447,409	$ 29,012
Increase (Decrease) in Partners' Capital [Roll Forward]
Issuance of general partner units (in units)				1,800
Issuance of general partner units			43,649	$ 43,649
Share-based award transactions, net (in units)				200	(225)
Share-based award transactions, net			4,462	$ 4,462
Redemptions of general partner units (in units)				(49)
Redemptions of general partner units			(1,322)	$ (1,322)
Distributions			(111,766)	(110,071)	$ (1,695)
Net income		$ 22,559	22,907	$ 22,559	$ 348
Balance as of end of period (in units) at Sep. 30, 2015				127,038	1,930
Balance as of end of period at Sep. 30, 2015			$ 1,434,351	$ 1,406,686	$ 27,665

[1] For the nine months ended September 30, 2014, amounts have been adjusted retroactively to reflect a 1-for-2 reverse stock split effected on December 15, 2014.