INTERIM CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Comprehensive Income (Loss), Net of Tax, Attributable to Parent [Abstract]
Net income	$ 4,199	$ 10,209	$ 12,117	$ 18,329
Other comprehensive income (loss):
Foreign currency translation adjustment gain (loss)	54	64	(104)	(159)
Increase (decrease) in fair value of derivative contracts	4,145	(3,641)	21,398	(40,356)
Reclassification of other comprehensive income to utilities expense	160	410	94	764
Reclassification of other comprehensive income to interest expense	3,414	2,703	6,789	3,461
Comprehensive income (loss)	11,972	9,745	40,294	(17,961)
Comprehensive (income) loss attributable to noncontrolling interests	(956)	(1,022)	(3,514)	1,809
Comprehensive income (loss) attributable to QTS Realty Trust, Inc.	$ 11,016	$ 8,723	$ 36,780	$ (16,152)