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Partners' Capital, Equity and Incentive Compensation Plans (Summary of Information About Awards Outstanding) (Details)
12 Months Ended
Dec. 31, 2015
$ / shares
shares
Operating Partnership [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Awards Outstanding 1,332,774
QTS Realty Trust, Inc Awards Outstanding [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Awards Outstanding 1,262,790
QTS Realty Trust, Inc Awards Outstanding [Member] | Restricted Stock [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Awards Outstanding 394,908
Remaining term of awards 3 years
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 $ 37.69
Awards Outstanding 867,882
Remaining term of awards 1 year
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
Awards Outstanding 1,292,899
Remaining term of awards 1 year
Class RS Units [Member] | Operating Partnership [Member]  
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Awards Outstanding 39,875
Remaining term of awards 0 years