Document and Entity Information - shares	6 Months Ended
	Jun. 30, 2015	Aug. 06, 2015
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Entity Registrant Name	QTS Realty Trust, Inc.
Entity Central Index Key	0001577368
Entity Filer Category	Accelerated Filer
Current Fiscal Year End Date	--12-31
Qualitytech, LP [Member]
Document Information [Line Items]
Document Type	10-Q
Amendment Flag	false
Document Period End Date	Jun. 30, 2015
Document Fiscal Year Focus	2015
Document Fiscal Period Focus	Q2
Entity Registrant Name	QualityTech, LP
Entity Central Index Key	0001561164
Entity Filer Category	Non-accelerated Filer
Current Fiscal Year End Date	--12-31
Common Class A [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		40,825,412
Common Class B [Member]
Document Information [Line Items]
Entity Common Stock, Shares Outstanding		133,000