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Partners' Capital, Equity and Incentive Compensation Plans - Summary of Information About Awards Outstanding (Detail) (USD $)
12 Months Ended
Dec. 31, 2013
Operating Partnership Awards Outstanding [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Upper limit of exercise price $ 25
Awards Outstanding 1,796,497
Operating Partnership Awards Outstanding [Member] | Class RS Units [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Awards Outstanding 173,750
Remaining term of awards 3 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
Awards Outstanding 1,622,747
Remaining term of awards 3 years
QTS Realty Trust, Inc Awards Outstanding [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Awards Outstanding 476,539
QTS Realty Trust, Inc Awards Outstanding [Member] | Restricted Stock [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Awards Outstanding 108,629
Remaining term of awards 4 years
QTS Realty Trust, Inc Awards Outstanding [Member] | Option to purchase Class A common stock [Member]
 
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]  
Exercise price $ 21
Awards Outstanding 367,910
Remaining term of awards 3 years