INTERIM CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Net income (loss)	$ 7,535	$ (6,433)	$ 28,683	$ (6,685)
Other comprehensive income (loss):
Foreign currency translation adjustment gain	66		66
Increase (decrease) in fair value of derivative contracts	(18,606)	2,563	(28,459)	8,545
Reclassification of other comprehensive income to interest expense (income)	(471)	91	(965)	493
Comprehensive income (loss)	(11,476)	(3,779)	(675)	2,353
Comprehensive (income) loss attributable to noncontrolling interests	1,291	431	74	(271)
Comprehensive income (loss) attributable to QTS Realty Trust, Inc.	(10,185)	(3,348)	(601)	2,082
Qualitytech, LP
Net income (loss)	7,535	(6,433)	28,683	(6,685)
Other comprehensive income (loss):
Foreign currency translation adjustment gain	66		66
Increase (decrease) in fair value of derivative contracts	(18,606)	2,563	(28,459)	8,545
Reclassification of other comprehensive income to interest expense (income)	(471)	91	(965)	493
Comprehensive income (loss)	$ (11,476)	$ (3,779)	$ (675)	$ 2,353