Document and Entity Information	9 Months Ended			9 Months Ended
	Sep. 30, 2013	Oct. 31, 2013 Class A	Oct. 31, 2013 Class B	Sep. 30, 2013 Healthcare Trust of America Holdings, LP (HTALP)
Entity Information [Line Items]
Entity Registrant Name	HEALTHCARE TRUST OF AMERICA, INC.			Healthcare Trust of America Holdings, LP
Entity Central Index Key	0001360604			0001495491
Document Type	10-Q			10-Q
Document Period End Date	Sep. 30, 2013			Sep. 30, 2013
Amendment Flag	false			false
Document Fiscal Year Focus	2013			2013
Document Fiscal Period Focus	Q3			Q3
Current Fiscal Year End Date	--12-31			--12-31
Entity Filer Category	Accelerated Filer			Non-accelerated Filer
Entity Common Stock, Shares Outstanding		179,640,980	57,268,109