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Partners' Capital, Equity and Incentive Compensation Plans (Summary of Award Activity Under 2010 Equity Incentive Plan and 2013 Equity Incentive Plan and Related Information) (Details) (USD $)
 12 Months Ended
Dec. 31, 2014
Dec. 31, 2013
Dec. 31, 2012
2013 Equity Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Beginning balance, Weighted average exercise price units $ 21.00qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		      
Weighted average exercise price units, Granted $ 32.66qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 $ 21.00qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		   
Weighted average exercise price units, Exercised $ 21.00qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedInPeriodWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 [1]      
Weighted average exercise price units, Released from restriction    [2]    [2]    [2]
Weighted average exercise price units, Cancelled/Expired $ 21.00qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpiredInPeriodWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		      
Ending balance, Weighted average exercise price units $ 29.13qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 $ 21.00qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		   
Beginning balance, Weighted average fair value $ 3.50us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		      
Weighted average fair value, Granted $ 4.96us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 $ 3.50us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		   
Weighted average fair value, Exercised $ 3.52qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 [1]      
Weighted average fair value, Released from restriction    [2]    [2]    [2]
Weighted average fair value, Cancelled/Expired $ 3.52us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 $ 3.52us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		   
Ending balance, Weighted average fair value $ 4.10us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 $ 3.50us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		   
Beginning balance, Weighted average exercise price options outstanding $ 21.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		      
Weighted average exercise price options outstanding, Granted $ 25.59us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 $ 21.00us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsGrantsInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		   
Weighted average exercise price options outstanding, Exercised $ 21.00us-gaap_ShareBasedCompensationArrangementsByShareBasedPaymentAwardOptionsExercisesInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 [1]      
Weighted average exercise price options outstanding, Released from restriction    [2]    [2]    [2]
Weighted average exercise price options outstanding, Cancelled/Expired $ 21.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriodWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		      
Ending balance, Weighted average exercise price options outstanding $ 22.87us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 $ 21.00us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingWeightedAverageExercisePrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		   
2013 Equity Incentive Plan [Member] | Options [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Beginning balance, Options Outstanding 367,910us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		      
Options, Granted 238,039us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 370,410us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsGrantsInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		   
Options, Exercised (3,000)us-gaap_StockIssuedDuringPeriodSharesStockOptionsExercised
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 [1]      
Options, Released from restriction    [2]    [2]    [2]
Options, Cancelled/Expired (18,000)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 (2,500)us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsForfeituresAndExpirationsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		   
Ending balance, Options Outstanding 584,949us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 367,910us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsOutstandingNumber
/ us-gaap_AwardTypeAxis
= us-gaap_EmployeeStockOptionMember
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		   
2013 Equity Incentive Plan [Member] | Restricted Stock [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Beginning balance, Number of units 108,629us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		      
Number of units, granted 172,102us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 108,629us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		   
Number of units, Exercised 25,786qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsExercisedInPeriodGross
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 [1]      
Number of units, Released from restriction    [2]    [2]    [2]
Number of units, Cancelled/Expired (8,160)qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpiredInPeriod
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		      
Ending balance, Number of units 246,785us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		 108,629us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_AwardTypeAxis
= us-gaap_RestrictedStockMember
/ us-gaap_PlanNameAxis
= qts_TwoThousandThirteenEquityIncentivePlanMember		   
2010 Equity Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Beginning balance, Weighted average fair value $ 3.84us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember		 $ 2.84us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember		 $ 4.38us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
Weighted average fair value, Granted    $ 10.62us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember		 $ 1.99us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
Weighted average fair value, Exercised $ 4.75qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember		 [1]      
Weighted average fair value, Released from restriction    [2]    [2]    [2]
Weighted average fair value, Cancelled/Expired $ 6.05us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember		 $ 5.31us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember		 $ 4.41us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeituresWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
Ending balance, Weighted average fair value $ 3.75us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember		 $ 3.84us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember		 $ 2.84us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageGrantDateFairValue
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
Class O Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Ending balance, Number of units 700,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember		    
Class O Units [Member] | 2010 Equity Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Beginning balance, Number of units 1,622,747us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember		 1,471,943us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember		 699,368us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember
Number of units, granted    224,244us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember		 908,925us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember
Number of units, Exercised (15,750)qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsExercisedInPeriodGross
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember		 [1]      
Number of units, Released from restriction    [2]    [2]    [2]
Number of units, Cancelled/Expired (88,280)qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpiredInPeriod
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember		 (73,440)qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpiredInPeriod
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember		 (136,350)qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpiredInPeriod
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember
Ending balance, Number of units 1,518,717us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember		 1,622,747us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember		 1,471,943us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember
Beginning balance, Weighted average exercise price units $ 23.44qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember		 $ 23.09qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember		 $ 20.00qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember
Weighted average exercise price units, Granted    $ 25.00qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember		 $ 25.00qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriodWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember
Weighted average exercise price units, Exercised $ 20.71qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsExercisedInPeriodWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember		 [1]      
Weighted average exercise price units, Released from restriction    [2]    [2]    [2]
Weighted average exercise price units, Cancelled/Expired $ 26.70qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedAndExpiredInPeriodWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember		      
Ending balance, Weighted average exercise price units $ 23.49qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember		 $ 23.44qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember		 $ 23.09qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassOMember
Class RS Units [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Ending balance, Number of units 100,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_StatementClassOfStockAxis
= qts_ClassRsMember		    
Units surrendered 8,160us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsForfeitedInPeriod
/ us-gaap_StatementClassOfStockAxis
= qts_ClassRsMember		    
Class RS Units [Member] | 2010 Equity Incentive Plan [Member]      
Share-based Compensation Arrangement by Share-based Payment Award [Line Items]      
Beginning balance, Number of units 173,750us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassRsMember		 178,750us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassRsMember		 50,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassRsMember
Number of units, granted       150,000us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsGrantsInPeriod
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassRsMember
Number of units, Exercised    [1]      
Number of units, Released from restriction (99,125)qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsReleasedFromRestrictionInPeriodGross
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassRsMember		 [2] (5,000)qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsReleasedFromRestrictionInPeriodGross
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassRsMember		 [2] (21,250)qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentOtherThanOptionsReleasedFromRestrictionInPeriodGross
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassRsMember		 [2]
Number of units, Cancelled/Expired         
Ending balance, Number of units 74,625us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassRsMember		 173,750us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassRsMember		 178,750us-gaap_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumber
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassRsMember
Beginning balance, Weighted average exercise price units $ 21.86qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassRsMember		      
Weighted average exercise price units, Granted         
Weighted average exercise price units, Exercised    [1]      
Weighted average exercise price units, Released from restriction    [2]    [2]    [2]
Weighted average exercise price units, Cancelled/Expired         
Ending balance, Weighted average exercise price units $ 23.49qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassRsMember		 $ 21.86qts_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedWeightedAverageExercisedPrice
/ us-gaap_PlanNameAxis
= qts_TwoThousandTenEquityIncentivePlanMember
/ us-gaap_StatementClassOfStockAxis
= qts_ClassRsMember		   
[1] This represents the Class A common stock that has been released from restriction and which was not surrendered by the holder to satisfy their statutory minimum federal and state tax obligations associated with the vesting of restricted common stock.
[2] This represents Class RS units that upon vesting have converted to Operating Partnership units.