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Noncontrolling Interest	6 Months Ended
Noncontrolling Interest	Jun. 30, 2015
Noncontrolling Interest [Abstract]
Noncontrolling Interest	10. Noncontrolling Interest Concurrently with the completion of the IPO, QTS consummated a series of transactions pursuant to which QTS became the sole general partner and majority owner of QualityTech, LP, which then became its operating partnership. The previous owners of QualityTech, LP retained 21.2% ownership of the Operating Partnership. Commencing at any time beginning November 1, 2014, at the election of the holders of the noncontrolling interest, the Class A units are redeemable for cash or, at the election of the Company, common stock of the Company on a one-for-one basis. During the first and second quarters of 2015, approximately 230,000 and 300,000 Class A units, respectively, were redeemed for the Company’s Class A common stock. As a result, the noncontrolling ownership interest of QualityTech, LP, after taking into account the Class A units redeemed, the grant of equity awards and the issuance of 5,000,000 and 5,750,000 shares of common stock in March and June 2015, respectively, was 14.6% at June 30, 2015.