Document and Entity Information	6 Months Ended
	Jun. 30, 2013	Jul. 29, 2013 Class A	Jul. 29, 2013 Class B
Entity Information [Line Items]
Entity Registrant Name	HEALTHCARE TRUST OF AMERICA, INC.
Entity Central Index Key	0001360604
Document Type	10-Q
Document Period End Date	Jun. 30, 2013
Amendment Flag	false
Document Fiscal Year Focus	2013
Document Fiscal Period Focus	Q2
Current Fiscal Year End Date	--12-31
Entity Filer Category	Accelerated Filer
Entity Common Stock, Shares Outstanding		173,826,706	57,280,877