CONSOLIDATED STATEMENTS OF EQUITY (UNAUDITED) - 9 months ended Sep. 30, 2015 - USD ($) shares in Thousands, $ in Thousands	Qualitytech, LP [Member] Partnership Units [Member] General Partner [Member]	Qualitytech, LP [Member] Partnership Units [Member] Limited Partner [Member]	Qualitytech, LP [Member]	Common Stock [Member]	Additional Paid-in Capital [Member]	Accumulated Dividends in Excess of Earnings [Member]	Total stockholders' Equity [Member]	Noncontrolling Interest [Member]	Total
Beginning balance at Dec. 31, 2014				$ 294	$ 324,917	$ (22,503)	$ 302,708	$ 77,477	$ 380,185
Beginning balance at Dec. 31, 2014		$ 380,185	$ 380,185
Beginning balance, shares at Dec. 31, 2014				29,408
Beginning balance, shares at Dec. 31, 2014	1	36,935
Issuance of shares through equity award plan				$ 3	(3)
Issuance of shares through equity award plan, shares		263		263
Net proceeds from equity offering		$ 368,420	$ 368,420	$ 108	330,482		330,590	37,830	368,420
Net proceeds from equity offering, shares		10,750		10,750
Reclassification of noncontrolling interest upon conversion of partnership units to common stock				$ 7	8,495		8,502	(8,502)
Reclassification of noncontrolling interest upon conversion of partnership units to common stock, shares				680
Equity-based compensation expense		$ 5,206	5,206		4,355		4,355	851	5,206
Dividend to shareholders		(37,362)	(37,362)			(37,362)	(37,362)		(37,362)
Distribution to noncontrolling interests								(6,691)	(6,691)
Partnership distribution		(6,691)	(6,691)
Net income		18,795	18,795			15,723	15,723	3,072	18,795
Ending balance at Sep. 30, 2015				$ 412	$ 668,246	$ (44,142)	$ 624,516	$ 104,037	$ 728,553
Ending balance at Sep. 30, 2015		$ 728,553	$ 728,553
Ending balance, shares at Sep. 30, 2015				41,101
Ending balance, shares at Sep. 30, 2015	1	47,948