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Partners' Capital, Equity and Incentive Compensation Plans - Summary of Information About Awards Outstanding (Detail) (USD $)
3 Months Ended
Mar. 31, 2014
Operating Partnership Awards Outstanding [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Awards Outstanding 1,795,247
Operating Partnership Awards Outstanding [Member] | Class RS Units [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise price   
Awards Outstanding 172,500
Remaining term of awards 2 years
Operating Partnership Awards Outstanding [Member] | Class O Units [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Lower limit of exercise price $ 20
Upper limit of exercise price $ 25
Awards Outstanding 1,622,747
Remaining term of awards 2 years
QTS Realty Trust, Inc Awards Outstanding [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Awards Outstanding 751,078
QTS Realty Trust, Inc Awards Outstanding [Member] | Restricted Stock [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise price   
Awards Outstanding 152,629
Remaining term of awards 4 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 $ 21
Upper limit of exercise price $ 25.51
Awards Outstanding 598,449
Remaining term of awards 2 years