CONDENSED CONSOLIDATED BALANCE SHEETS (Parenthetical) - $ / shares	Jun. 30, 2018	Dec. 31, 2017
Equity:
Preferred stock, par value (in dollars per share)	$ 0.01	$ 0.01
Preferred stock, shares authorized (in shares)	200,000,000	200,000,000
Preferred stock, shares issued (in shares)	0	0
Preferred stock, shares outstanding (in shares)	0	0
Healthcare Trust of America Holdings, LP (HTALP)
Partners’ Capital:
Limited partner's capital, units issued (in shares)	3,939,816	4,124,148
Limited partner's capital, units outstanding (in shares)	3,939,816	4,124,148
General partner's capital, units issued (in shares)	207,493,355	204,892,118
General partner's capital, units outstanding (in shares)	207,493,355	204,892,118
Class A Common Stock
Equity:
Common stock, par value (in dollars per share)	$ 0.01	$ 0.01
Common stock, shares authorized (in shares)	1,000,000,000	1,000,000,000
Common stock, shares issued (in shares)	207,493,355	204,892,118
Common stock, shares outstanding (in shares)	207,493,355	204,892,118