CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (LOSS) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2020	Dec. 31, 2019	Dec. 31, 2018
Net income (loss)	$ 14,576	$ 31,665	$ (7,175)
Other comprehensive income (loss):
Foreign currency translation adjustment gain	187	34	0
Increase (decrease) in fair value of derivative contracts	(28,295)	(29,843)	895
Reclassification of other comprehensive income to utilities expense	1,204	749	0
Reclassification of other comprehensive income to interest expense	10,148	(1,031)	110
Comprehensive income (loss)	(2,180)	1,574	(6,170)
Comprehensive (income) loss attributable to noncontrolling interests	213	(169)	711
Comprehensive income (loss) attributable to QTS Realty Trust, Inc.	$ (1,967)	$ 1,405	$ (5,459)