XML 65 R51.htm IDEA: XBRL DOCUMENT v2.4.1.9
Noncontrolling Interest (Narrative) (Details)
 3 Months Ended
Mar. 31, 2015
Oct. 31, 2014
Quality Tech LP ownership percentage in operating partnership   21.20%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
Stock conversion ratio 1us-gaap_StockholdersEquityNoteStockSplitConversionRatio1  
Qualitytech, LP [Member]    
Quality Tech LP ownership percentage in operating partnership 17.30%us-gaap_MinorityInterestOwnershipPercentageByNoncontrollingOwners
/ dei_LegalEntityAxis
= qts_QualitytechLpMember		  
Shares issued 5,000,000qts_NetProceedsFromEquityOfferingShares
/ dei_LegalEntityAxis
= qts_QualitytechLpMember		  
Class A Units [Member]    
Units redeemed for common stock 230,000qts_UnitsRedeemedForCommonStock
/ us-gaap_StatementClassOfStockAxis
= us-gaap_CapitalUnitClassAMember