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Partners' Capital, Equity and Incentive Compensation Plans (Summary of Information About Awards Outstanding) (Details)
6 Months Ended
Jun. 30, 2016
$ / shares
shares
Operating Partnership [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Awards Outstanding 1,203,169
QTS Realty Trust, Inc Awards Outstanding [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Awards Outstanding 1,546,225
QTS Realty Trust, Inc Awards Outstanding [Member] | Restricted Stock [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Awards Outstanding 480,537
Remaining term of awards 2 years 6 months
QTS Realty Trust, Inc Awards Outstanding [Member] | Options to purchase Class A common stock [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Lower limit of exercise price | $ / shares $ 21.00
Upper limit of exercise price | $ / shares $ 45.78
Awards Outstanding 1,065,688
Remaining term of awards 1 year 3 months 18 days
Class O Units [Member] | Operating Partnership [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Lower limit of exercise price | $ / shares $ 20.00
Upper limit of exercise price | $ / shares $ 25.00
Awards Outstanding 1,203,169
Remaining term of awards 2 months 12 days
Class RS Units [Member] | Operating Partnership [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise price | $ / shares
Awards Outstanding