CONDENSED CONSOLIDATED FINANCIAL STATEMENTS CONSOLIDATED STATEMENT OF EQUITY (UNAUDITED) - USD ($) $ in Thousands	Qualitytech, LP [Member] General Partner [Member]	Qualitytech, LP [Member] Limited Partner [Member]	Qualitytech, LP [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Other Comprehensive Income (Loss) [Member]	Accumulated Dividends in Excess of Earnings [Member]	Total stockholders' Equity [Member]	Noncontrolling Interest [Member]	Total
Beginning balance at Dec. 31, 2013				$ 289	$ 318,834	$ (357)	$ (3,799)	$ 314,967	$ 84,737	$ 399,704
Beginning balance at Dec. 31, 2013		$ 399,704	$ 399,704
Beginning balance, shares at Dec. 31, 2013				28,973
Beginning balance, shares at Dec. 31, 2013	1,000	36,770,000
Issuance of shares through equity award plan				$ 5	(5)
Issuance of shares through equity award plan, shares		165,000		165
Reclassification of noncontrolling interest upon conversion of partnership units to common stock					2,811			2,811	(2,811)
Reclassification of noncontrolling interest upon conversion of partnership units to common stock, shares				270
Other comprehensive gain (loss)		$ 453	453			$ 357		357	96	453
Net proceeds from IPO		9,452	9,452
Equity-based compensation expense		4,153	4,153		3,277			3,277	876	4,153
Dividend to shareholder		(33,776)	(33,776)				(33,776)	(33,776)		(33,776)
Distributions to noncontrolling interests									(9,452)	(9,452)
Net income		19,103	19,103				15,072	15,072	4,031	19,103
Ending balance at Dec. 31, 2014				$ 294	324,917		(22,503)	302,708	77,477	380,185
Ending balance at Dec. 31, 2014		$ 380,185	380,185
Ending balance, shares at Dec. 31, 2014				29,408
Ending balance, shares at Dec. 31, 2014	1,000	36,935,000
Issuance of shares through equity award plan		$ (644)		$ 3	(3)				(644)	(644)
Issuance of shares through equity award plan, shares		338,000		338
Reclassification of noncontrolling interest upon conversion of partnership units to common stock				$ 7	9,239			9,246	(9,246)
Reclassification of noncontrolling interest upon conversion of partnership units to common stock, shares				730
Net proceeds from equity offering		$ (368,664)	(368,664)	$ (108)	(330,256)			(330,364)	(38,300)	(368,664)
Net proceeds from equity offering, shares		10,750,000		10,750
Equity-based compensation expense		$ 6,964	6,964		5,866			5,866	1,098	6,964
Dividend to shareholder		(50,555)	(50,555)				(50,555)	(50,555)		(50,555)
Distributions to noncontrolling interests									(8,877)	(8,877)
Partnership distributions		(8,877)	(8,877)
Net income		24,129	24,129				20,326	20,326	3,803	24,129
Ending balance at Dec. 31, 2015				$ 412	670,275		(52,732)	617,955	101,911	719,866
Ending balance at Dec. 31, 2015		$ 719,866	719,866
Ending balance, shares at Dec. 31, 2015				41,226
Ending balance, shares at Dec. 31, 2015	1,000	48,023,000
Issuance of shares through equity award plan		$ (1,726)	(1,726)	$ 3	(3)				(1,726)	(1,726)
Issuance of shares through equity award plan, shares		280,000		280
Net proceeds from equity offering		$ (275,862)	(275,862)	$ (63)	(252,282)			(252,345)	(23,517)	(275,862)
Net proceeds from equity offering, shares		6,325,000		6,325
Equity-based compensation expense		$ 10,584	10,584		9,229			9,229	1,355	10,584
Dividend to shareholder		(66,586)	(66,586)				(66,586)	(66,586)		(66,586)
Distributions to noncontrolling interests									(9,875)	(9,875)
Partnership distributions		(9,875)	(9,875)
Net income		24,685	24,685				21,525	21,525	3,160	24,685
Ending balance at Dec. 31, 2016				$ 478	$ 931,783		$ (97,793)	$ 834,468	$ 118,342	$ 952,810
Ending balance at Dec. 31, 2016		$ 952,810	$ 952,810
Ending balance, shares at Dec. 31, 2016				47,831
Ending balance, shares at Dec. 31, 2016	1,000	54,628,000