CONSOLIDATED STATEMENTS OF CASH FLOWS - USD ($)	12 Months Ended
	Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Cash flows from operating activities:
Net income	$ 30,758,000	$ 217,626,000	$ 65,577,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	280,969,000	271,441,000	239,044,000
Share-based compensation expense	10,127,000	9,755,000	6,870,000
Impairment	0	8,887,000	13,922,000
Income from unconsolidated joint venture	(1,882,000)	(1,735,000)	(782,000)
Distributions from unconsolidated joint venture	3,030,000	2,665,000	750,000
Loss (gain) on sale of real estate, net	154,000	(165,977,000)	(37,802,000)
Loss (gain) on extinguishment of debt, net	21,646,000	(242,000)	11,192,000
Change in fair value of derivative financial instruments	0	0	(884,000)
Changes in operating assets and liabilities:
Receivables and other assets, net	(12,857,000)	(17,558,000)	(33,295,000)
Accounts payable and accrued liabilities	(128,000)	9,478,000	37,406,000
Prepaid rent and other liabilities	8,577,000	3,056,000	5,545,000
Net cash provided by operating activities	340,394,000	337,396,000	307,543,000
Cash flows from investing activities:
Investments in real estate	(553,298,000)	(17,389,000)	(2,383,581,000)
Investment in unconsolidated joint venture	0	0	(68,839,000)
Development of real estate	(28,066,000)	(34,270,000)	(25,191,000)
Proceeds from the sale of real estate	4,880,000	305,135,000	80,640,000
Capital expenditures	(91,544,000)	(77,870,000)	(64,833,000)
Collection of real estate notes receivable	739,000	703,000	9,964,000
Advances on real estate notes receivable	0	0	(3,256,000)
Net cash (used in) provided by investing activities	(667,289,000)	176,309,000	(2,455,096,000)
Cash flows from financing activities:
Borrowings on unsecured revolving credit facility	610,000,000	145,000,000	570,000,000
Payments on unsecured revolving credit facility	(510,000,000)	(145,000,000)	(658,000,000)
Proceeds from unsecured senior notes	906,927,000	0	900,000,000
Payments on unsecured senior notes	(700,000,000)	0	0
Payments on secured mortgage loans	(97,361,000)	(241,021,000)	(77,024,000)
Deferred financing costs	(7,776,000)	(782,000)	(16,904,000)
Debt extinguishment costs	(18,383,000)	(1,909,000)	(10,571,000)
Security deposits	0	0	2,419,000
Proceeds from issuance of common stock	323,393,000	72,814,000	1,746,956,000
Issuance of OP Units	0	411,000	0
Repurchase and cancellation of common stock	(12,178,000)	(70,319,000)	(3,413,000)
Dividends paid	(256,117,000)	(252,651,000)	(207,087,000)
Distributions paid to noncontrolling interest of limited partners	(8,758,000)	(5,278,000)	(5,308,000)
Sale of noncontrolling interest	1,234,000	0	0
Net cash provided by (used in) financing activities	230,981,000	(498,735,000)	2,241,068,000
Net change in cash, cash equivalents and restricted cash	(95,914,000)	14,970,000	93,515,000
Cash, cash equivalents and restricted cash - beginning of year	133,530,000	118,560,000	25,045,000
Cash, cash equivalents and restricted cash - end of year	37,616,000	133,530,000	118,560,000
Healthcare Trust of America Holdings, LP (HTALP)
Cash flows from operating activities:
Net income	30,758,000	217,626,000	65,577,000
Adjustments to reconcile net income to net cash provided by operating activities:
Depreciation and amortization	280,969,000	271,441,000	239,044,000
Share-based compensation expense	10,127,000	9,755,000	6,870,000
Impairment	0	8,887,000	13,922,000
Income from unconsolidated joint venture	(1,882,000)	(1,735,000)	(782,000)
Distributions from unconsolidated joint venture	3,030,000	2,665,000	750,000
Loss (gain) on sale of real estate, net	154,000	(165,977,000)	(37,802,000)
Loss (gain) on extinguishment of debt, net	21,646,000	(242,000)	11,192,000
Change in fair value of derivative financial instruments	0	0	(884,000)
Changes in operating assets and liabilities:
Receivables and other assets, net	(12,857,000)	(17,558,000)	(33,295,000)
Accounts payable and accrued liabilities	(128,000)	9,478,000	37,406,000
Prepaid rent and other liabilities	8,577,000	3,056,000	5,545,000
Net cash provided by operating activities	340,394,000	337,396,000	307,543,000
Cash flows from investing activities:
Investments in real estate	(553,298,000)	(17,389,000)	(2,383,581,000)
Investment in unconsolidated joint venture	0	0	(68,839,000)
Development of real estate	(28,066,000)	(34,270,000)	(25,191,000)
Proceeds from the sale of real estate	4,880,000	305,135,000	80,640,000
Capital expenditures	(91,544,000)	(77,870,000)	(64,833,000)
Collection of real estate notes receivable	739,000	703,000	9,964,000
Advances on real estate notes receivable	0	0	(3,256,000)
Net cash (used in) provided by investing activities	(667,289,000)	176,309,000	(2,455,096,000)
Cash flows from financing activities:
Borrowings on unsecured revolving credit facility	610,000,000	145,000,000	570,000,000
Payments on unsecured revolving credit facility	(510,000,000)	(145,000,000)	(658,000,000)
Proceeds from unsecured senior notes	906,927,000	0	900,000,000
Payments on unsecured senior notes	(700,000,000)	0	0
Payments on secured mortgage loans	(97,361,000)	(241,021,000)	(77,024,000)
Deferred financing costs	(7,776,000)	(782,000)	(16,904,000)
Debt extinguishment costs	(18,383,000)	(1,909,000)	(10,571,000)
Security deposits	0	0	2,419,000
Proceeds from issuance of general partner units	323,393,000	72,814,000	1,746,956,000
Issuance of OP Units	0	411,000	0
Repurchase and cancellation of general partner units	(12,178,000)	(70,319,000)	(3,413,000)
Distributions paid to general partner	(256,117,000)	(252,651,000)	(207,087,000)
Distributions paid to limited partners and redeemable noncontrolling interests	(8,758,000)	(5,278,000)	(5,308,000)
Sale of noncontrolling interest	1,234,000	0	0
Net cash provided by (used in) financing activities	230,981,000	(498,735,000)	2,241,068,000
Net change in cash, cash equivalents and restricted cash	(95,914,000)	14,970,000	93,515,000
Cash, cash equivalents and restricted cash - beginning of year	133,530,000	118,560,000	25,045,000
Cash, cash equivalents and restricted cash - end of year	$ 37,616,000	$ 133,530,000	$ 118,560,000