CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) shares in Thousands		12 Months Ended
		Dec. 31, 2017	Dec. 31, 2016	Dec. 31, 2015
Revenues:
Rental income		$ 612,556,000	$ 460,563,000	$ 403,553,000
Interest and other operating income		1,434,000	365,000	269,000
Total revenues		613,990,000	460,928,000	403,822,000
Expenses:
Rental		192,147,000	143,751,000	123,390,000
General and administrative		33,403,000	28,773,000	25,578,000
Transaction		5,885,000	6,538,000	4,555,000
Depreciation and amortization		244,986,000	176,866,000	154,134,000
Impairment		13,922,000	3,080,000	2,581,000
Total expenses		490,343,000	359,008,000	310,238,000
Income before other income (expense)		123,647,000	101,920,000	93,584,000
Interest expense:
Interest related to derivative financial instruments		(1,031,000)	(2,377,000)	(3,140,000)
Gain (loss) on change in fair value of derivative financial instruments, net		884,000	1,344,000	(769,000)
Total interest related to derivative financial instruments, including net change in fair value of derivative financial instruments		(147,000)	(1,033,000)	(3,909,000)
Interest related to debt		(85,344,000)	(59,769,000)	(54,967,000)
Gain on sale of real estate, net		37,802,000	8,966,000	152,000
(Loss) gain on extinguishment of debt, net		(11,192,000)	(3,025,000)	123,000
Income from unconsolidated joint venture		782,000	0	0
Other income (expense)		29,000	286,000	(1,426,000)
Net income		65,577,000	47,345,000	33,557,000
Net income attributable to noncontrolling interests	[1]	(1,661,000)	(1,433,000)	(626,000)
Net income attributable to common stockholders/unitholders		$ 63,916,000	$ 45,912,000	$ 32,931,000
Earnings per common share/unit - basic:
Net income attributable to common stockholders/unitholders (in dollars per share)		$ 0.35	$ 0.34	$ 0.26
Earnings per common share/unit - diluted:
Net income attributable to common stockholders/unitholders (in dollars per share)		$ 0.34	$ 0.33	$ 0.26
Weighted average common shares/units outstanding:
Basic (in shares/units)		181,064	136,620	126,074
Diluted (in shares/units)		185,278	140,259	128,004
Healthcare Trust of America Holdings, LP (HTALP)
Revenues:
Rental income		$ 612,556,000	$ 460,563,000	$ 403,553,000
Interest and other operating income		1,434,000	365,000	269,000
Total revenues		613,990,000	460,928,000	403,822,000
Expenses:
Rental		192,147,000	143,751,000	123,390,000
General and administrative		33,403,000	28,773,000	25,578,000
Transaction		5,885,000	6,538,000	4,555,000
Depreciation and amortization		244,986,000	176,866,000	154,134,000
Impairment		13,922,000	3,080,000	2,581,000
Total expenses		490,343,000	359,008,000	310,238,000
Income before other income (expense)		123,647,000	101,920,000	93,584,000
Interest expense:
Interest related to derivative financial instruments		(1,031,000)	(2,377,000)	(3,140,000)
Gain (loss) on change in fair value of derivative financial instruments, net		884,000	1,344,000	(769,000)
Total interest related to derivative financial instruments, including net change in fair value of derivative financial instruments		(147,000)	(1,033,000)	(3,909,000)
Interest related to debt		(85,344,000)	(59,769,000)	(54,967,000)
Gain on sale of real estate, net		37,802,000	8,966,000	152,000
(Loss) gain on extinguishment of debt, net		(11,192,000)	(3,025,000)	123,000
Income from unconsolidated joint venture		782,000	0	0
Other income (expense)		29,000	286,000	(1,426,000)
Net income		65,577,000	47,345,000	33,557,000
Net income attributable to noncontrolling interests		(123,000)	(118,000)	(112,000)
Net income attributable to common stockholders/unitholders		$ 65,454,000	$ 47,227,000	$ 33,445,000
Earnings per common share/unit - basic:
Net income attributable to common stockholders/unitholders (in dollars per share)		$ 0.35	$ 0.34	$ 0.26
Earnings per common share/unit - diluted:
Net income attributable to common stockholders/unitholders (in dollars per share)		$ 0.35	$ 0.34	$ 0.26
Weighted average common shares/units outstanding:
Basic (in shares/units)		185,261	140,259	128,079
Diluted (in shares/units)		185,278	140,259	128,079

[1] Includes amounts attributable to redeemable noncontrolling interests.