INTERIM CONSOLIDATED FINANCIAL STATEMENTS CONSOLIDATED STATEMENT OF EQUITY - USD ($) shares in Thousands, $ in Thousands	Series A Preferred Stock Qualitytech, LP Preferred stock Limited Partner	Series A Preferred Stock Qualitytech, LP Common stock Limited Partner	Series A Preferred Stock Qualitytech, LP	Series A Preferred Stock Preferred stock	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 Preferred stock Limited Partner	Series B Preferred Stock Qualitytech, LP Common stock Limited Partner	Series B Preferred Stock Qualitytech, LP	Series B Preferred Stock Preferred stock	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	Qualitytech, LP	Preferred stock	Common stock	Additional paid-in capital	Accumulated other comprehensive income	Accumulated dividends in excess of earnings	Total stockholders' Equity	Noncontrolling interests	Total
Beginning balance at Dec. 31, 2017																		$ 1,449			$ 507	$ 1,049,176	$ 1,283	$ (173,552)	$ 877,414	$ 113,242	$ 990,656
Beginning balance, shares at Dec. 31, 2017																					50,702
Limited Partners' Capital, Beginning at Dec. 31, 2017																$ 989,207
Limited Partners' Capital, Beginning balance, shares at Dec. 31, 2017																57,246
Beginning balance, shares at Dec. 31, 2017																	1
Partners' Capital, Beginning Balance at Dec. 31, 2017																			$ 990,656
Net share activity through equity award plan																$ (238)			(238)		$ 4	(1,311)			(1,307)	1,069	(238)
Net share activity through equity award plan, shares																564					434
Increase (decrease) in fair value of derivative contracts																		5,982	5,982				5,290		5,290	692	5,982
Equity-based compensation expense																$ 4,898			4,898			4,337			4,337	561	4,898
Net proceeds from stock offering	$ 103,184		$ 103,184	$ 103,184		$ 103,184	$ 103,184
Net proceeds from stock offering (in shares)	4,280			4,280
Dividends declared on Preferred Stock																			(328)					(328)	(328)		(328)
Dividends declared on Preferred Units																(328)			(328)
Dividends declared to common shareholders																(20,971)			(20,971)					(20,971)	(20,971)		(20,971)
Dividends to noncontrolling interests																										(2,736)	(2,736)
Partnership distributions																(2,736)			(2,736)
Net income (loss)																(252)			(252)					(223)	(223)	(29)	(252)
Ending balance at Mar. 31, 2018																		7,431		$ 103,184	$ 511	1,052,202	6,573	(195,074)	967,396	112,799	1,080,195
Ending balance, shares at Mar. 31, 2018																				4,280	51,136
Limited Partners' Capital, Ending balance at Mar. 31, 2018															$ 103,184	$ 969,580
Limited Partners' Capital Ending balance, shares at Mar. 31, 2018															4,280	57,810
Ending balance, shares at Mar. 31, 2018																	1
Partners' Capital, Ending Balance at Mar. 31, 2018																			1,080,195
Beginning balance at Dec. 31, 2018																		2,344		$ 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	51,123
Limited Partners' Capital, Beginning at Dec. 31, 2018															$ 407,477	$ 886,866
Limited Partners' Capital, Beginning balance, shares at Dec. 31, 2018															7,443	57,799
Beginning balance, shares at Dec. 31, 2018																	1
Partners' Capital, Beginning Balance at Dec. 31, 2018																			1,296,687
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
Opening Equity Adjustment upon ASC 842 adoption																(1,813)			(1,813)					(1,813)	(1,813)		(1,813)
Adjustment to expenses net from Series B Preferred stock offering								$ (42)		$ (42)	$ (42)		$ (42)	$ (42)
Net proceeds from stock offering																$ 158,663			158,663		$ 40	148,650			148,690	9,973	158,663
Net proceeds from stock offering (in shares)																4,000					4,000
Dividends declared on Preferred Stock					$ (1,906)	$ (1,906)	$ (1,906)					$ (5,139)	$ (5,139)	$ (5,139)					(7,045)								(7,045)
Dividends declared on Preferred Units		$ (1,906)	$ (1,906)						$ (5,139)	$ (5,139)
Dividends declared to common shareholders																$ (24,371)			(24,371)					(24,371)	(24,371)		(24,371)
Dividends to noncontrolling interests																										(2,935)	(2,935)
Partnership distributions																(2,935)			(2,935)
Net income (loss)																21,148			21,148					19,558	19,558	1,590	21,148
Ending balance at Mar. 31, 2019																		$ (7,509)		$ 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	55,354
Limited Partners' Capital, Ending balance at Mar. 31, 2019															$ 407,435	$ 1,034,554
Limited Partners' Capital Ending balance, shares at Mar. 31, 2019															7,443	62,028
Ending balance, shares at Mar. 31, 2019																	1
Partners' Capital, Ending Balance at Mar. 31, 2019																			$ 1,434,480