CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
Net income	$ 10,209	$ 7,535	$ 18,329	$ 28,683
Other comprehensive income (loss):
Foreign currency translation adjustment gain (loss)	64	66	(159)	66
Decrease in fair value of derivative contracts	(3,641)	(18,606)	(40,356)	(28,459)
Reclassification of other comprehensive income to utilities expense	410		764
Reclassification of other comprehensive income to interest expense	2,703	(471)	3,461	(965)
Comprehensive income (loss)	9,745	(11,476)	(17,961)	(675)
Comprehensive (income) loss attributable to noncontrolling interests	(1,022)	1,291	1,809	74
Comprehensive income (loss) attributable to QTS Realty Trust, Inc.	8,723	(10,185)	(16,152)	(601)
Qualitytech, LP
Net income	10,209	7,535	18,329	28,683
Other comprehensive income (loss):
Foreign currency translation adjustment gain (loss)	64	66	(159)	66
Decrease in fair value of derivative contracts	(3,641)	(18,606)	(40,356)	(28,459)
Reclassification of other comprehensive income to utilities expense	410		764
Reclassification of other comprehensive income to interest expense	2,703	(471)	3,461	(965)
Comprehensive income (loss)	$ 9,745	$ (11,476)	$ (17,961)	$ (675)