CONSOLIDATED STATEMENTS OF EQUITY - USD ($) shares in Thousands, $ in Thousands	Series A Preferred Stock Qualitytech, LP Common stock Limited Partner	Series A Preferred Stock Qualitytech, LP	Series A Preferred Stock Accumulated dividends in excess of earnings	Series A Preferred Stock Total stockholders' Equity	Series A Preferred Stock	Series B Preferred Stock Qualitytech, LP Common stock Limited Partner	Series B Preferred Stock Qualitytech, LP	Series B Preferred Stock Accumulated dividends in excess of earnings	Series B Preferred Stock Total stockholders' Equity	Series B Preferred Stock	Qualitytech, LP Preferred stock Limited Partner	Qualitytech, LP Common stock Limited Partner	Qualitytech, LP Common stock General Partner	Qualitytech, LP Accumulated other comprehensive income (loss)	Qualitytech, LP	Preferred stock	Common stock	Additional paid-in capital	Accumulated other comprehensive income (loss)	Accumulated dividends in excess of earnings	Total stockholders' Equity	Noncontrolling interests	Total
Beginning balance at Dec. 31, 2018											$ 407,477	$ 886,866	$ 1	$ 2,344	$ 1,296,687	$ 407,477	$ 511	$ 1,062,473	$ 2,073	$ (278,548)	$ 1,193,986	$ 102,701	$ 1,296,687
Beginning balance, shares at Dec. 31, 2018											7,443	57,799				7,443	51,123
Net cumulative effect upon Topic ASC 842 adoption												$ (1,813)			(1,813)					(1,813)	(1,813)		(1,813)
Net share activity through equity award plan												$ 741			741		$ 3	660			663	78	741
Net share activity through equity award plan, shares												229					231
Increase (Decrease) in fair value of derivative contracts														(9,853)	(9,853)				(8,775)		(8,775)	(1,078)	(9,853)
Equity-based compensation expense												$ 3,300			3,300			2,928			2,928	372	3,300
Adjustment to expenses net											$ (42)				(42)	$ (42)					(42)		(42)
Proceeds net of fees from common equity offering												$ 158,663			158,663		$ 40	148,650			148,690	9,973	158,663
Proceeds net of fees from common equity offering (in shares)												4,000					4,000
Dividends declared on Preferred Stock	$ (1,906)	$ (1,906)	$ (1,906)	$ (1,906)	$ (1,906)	$ (5,139)	$ (5,139)	$ (5,139)	$ (5,139)	$ (5,139)
Dividends declared to common stockholders												$ (24,371)			(24,371)					(24,371)	(24,371)		(24,371)
Dividends declared to noncontrolling interests																						(2,935)	(2,935)
Partnership distributions												(2,935)			(2,935)
Net income												21,148			21,148					19,558	19,558	1,590	21,148
Ending balance at Mar. 31, 2019											$ 407,435	$ 1,034,554	1	(7,509)	1,434,480	$ 407,435	$ 554	1,214,711	(6,702)	(292,219)	1,323,779	110,701	1,434,480
Ending balance, shares at Mar. 31, 2019											7,443	62,028				7,443	55,354
Beginning balance at Dec. 31, 2018											$ 407,477	$ 886,866	1	2,344	1,296,687	$ 407,477	$ 511	1,062,473	2,073	(278,548)	1,193,986	102,701	1,296,687
Beginning balance, shares at Dec. 31, 2018											7,443	57,799				7,443	51,123
Increase (Decrease) in fair value of derivative contracts															(28,459)								(28,459)
Foreign currency translation adjustments															66								66
Dividends declared on Preferred Stock															(14,090)								(14,090)
Net income															28,683								28,683
Ending balance at Jun. 30, 2019											$ 407,435	$ 1,012,210	1	(26,115)	1,393,530	$ 407,435	$ 554	1,219,048	(23,310)	(316,158)	1,287,569	105,961	1,393,530
Ending balance, shares at Jun. 30, 2019											7,443	62,059				7,443	55,391
Beginning balance at Mar. 31, 2019											$ 407,435	$ 1,034,554	1	(7,509)	1,434,480	$ 407,435	$ 554	1,214,711	(6,702)	(292,219)	1,323,779	110,701	1,434,480
Beginning balance, shares at Mar. 31, 2019											7,443	62,028				7,443	55,354
Net share activity through equity award plan												$ 179			179			505			505	(326)	179
Net share activity through equity award plan, shares												31					37
Increase (Decrease) in fair value of derivative contracts														(18,606)	(18,606)				(16,608)		(16,608)	(1,998)	(18,606)
Foreign currency translation adjustments															66								66
Equity-based compensation expense												$ 4,296			4,296			3,832			3,832	464	4,296
Dividends declared on Preferred Stock	(1,906)	(1,906)	(1,906)	(1,906)	(1,906)	(5,139)	(5,139)	(5,139)	(5,139)	(5,139)					(7,045)								(7,045)
Dividends declared to common stockholders												(24,377)			(24,377)					(24,377)	(24,377)		(24,377)
Dividends declared to noncontrolling interests																						(2,932)	(2,932)
Partnership distributions												(2,932)			(2,932)
Net income												7,535			7,535					7,483	7,483	52	7,535
Ending balance at Jun. 30, 2019											$ 407,435	$ 1,012,210	$ 1	(26,115)	1,393,530	$ 407,435	$ 554	1,219,048	(23,310)	(316,158)	1,287,569	105,961	1,393,530
Ending balance, shares at Jun. 30, 2019											7,443	62,059				7,443	55,391
Beginning balance at Dec. 31, 2019											$ 407,435	$ 1,064,481		(27,465)	1,444,451	$ 407,435	$ 582	1,330,444	(24,642)	(376,002)	1,337,817	106,634	1,444,451
Beginning balance, shares at Dec. 31, 2019											7,443	64,901	1			7,443	58,228
Partners' Capital, Beginning Balance at Dec. 31, 2019															1,444,451
Net share activity through equity award plan												$ (1,458)			(1,458)		$ 3	(1,312)			(1,309)	(149)	(1,458)
Net share activity through equity award plan, shares												238					240
Increase (Decrease) in fair value of derivative contracts														(36,715)	(36,715)				(33,155)		(33,155)	(3,560)	(36,715)
Foreign currency translation adjustments														(223)	(223)				(201)		(201)	(22)	(223)
Equity-based compensation expense												$ 4,875			4,875			4,377			4,377	498	4,875
Proceeds net of fees from settlement of forward shares												$ 83,217			83,217		$ 19	78,516			78,535	4,682	83,217
Proceeds net of fees from settlement of forward shares (in shares)												1,930					1,930
Dividends declared on Preferred Stock	(1,906)	(1,906)	(1,906)	(1,906)	(1,906)	(5,139)	(5,139)	(5,139)	(5,139)	(5,139)
Dividends declared to common stockholders												$ (28,393)			(28,393)					(28,393)	(28,393)		(28,393)
Dividends declared to noncontrolling interests																						(3,133)	(3,133)
Partnership distributions												(3,133)			(3,133)
Net income												8,120			8,120					8,010	8,010	110	8,120
Ending balance at Mar. 31, 2020											$ 407,435	$ 1,120,664		(64,403)	1,463,696	$ 407,435	$ 604	1,412,025	(57,998)	(403,430)	1,358,636	105,060	1,463,696
Ending balance, shares at Mar. 31, 2020											7,443	67,069	1			7,443	60,398
Beginning balance at Dec. 31, 2019											$ 407,435	$ 1,064,481		(27,465)	1,444,451	$ 407,435	$ 582	1,330,444	(24,642)	(376,002)	1,337,817	106,634	1,444,451
Beginning balance, shares at Dec. 31, 2019											7,443	64,901	1			7,443	58,228
Partners' Capital, Beginning Balance at Dec. 31, 2019															1,444,451
Increase (Decrease) in fair value of derivative contracts															(40,356)								(40,356)
Foreign currency translation adjustments															(159)								(159)
Dividends declared on Preferred Stock															(14,090)								(14,090)
Net income															18,329								18,329
Ending balance at Jun. 30, 2020											$ 407,435	$ 1,147,481		(67,980)	1,486,936	$ 407,435	$ 614	1,463,445	(61,322)	(428,972)	1,381,200	105,736	1,486,936
Ending balance, shares at Jun. 30, 2020											7,443	68,102	1			7,443	61,432
Partners' Capital, Ending Balance at Jun. 30, 2020															1,486,936
Beginning balance at Mar. 31, 2020											$ 407,435	$ 1,120,664		(64,403)	1,463,696	$ 407,435	$ 604	1,412,025	(57,998)	(403,430)	1,358,636	105,060	1,463,696
Beginning balance, shares at Mar. 31, 2020											7,443	67,069	1			7,443	60,398
Net share activity through equity award plan												$ (1,360)			(1,360)			(1,225)			(1,225)	(135)	(1,360)
Net share activity through equity award plan, shares												1					1
Increase (Decrease) in fair value of derivative contracts														(3,641)	(3,641)				(3,382)		(3,382)	(259)	(3,641)
Foreign currency translation adjustments														64	64				58		58	6	64
Equity-based compensation expense												$ 6,081			6,081			5,477			5,477	604	6,081
Proceeds net of fees from settlement of forward shares												$ 50,455			50,455		$ 10	47,168			47,178	3,277	50,455
Proceeds net of fees from settlement of forward shares (in shares)												1,032					1,033
Dividends declared on Preferred Stock	$ (1,906)	$ (1,906)	$ (1,906)	$ (1,906)	$ (1,906)	$ (5,139)	$ (5,139)	$ (5,139)	$ (5,139)	$ (5,139)					(7,045)								(7,045)
Dividends declared to common stockholders												$ (28,389)			(28,389)					(28,389)	(28,389)		(28,389)
Dividends declared to noncontrolling interests																						(3,134)	(3,134)
Partnership distributions												(3,134)			(3,134)
Net income												10,209			10,209					9,892	9,892	317	10,209
Ending balance at Jun. 30, 2020											$ 407,435	$ 1,147,481		$ (67,980)	1,486,936	$ 407,435	$ 614	$ 1,463,445	$ (61,322)	$ (428,972)	$ 1,381,200	$ 105,736	$ 1,486,936
Ending balance, shares at Jun. 30, 2020											7,443	68,102	1			7,443	61,432
Partners' Capital, Ending Balance at Jun. 30, 2020															$ 1,486,936