CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2020	Jun. 30, 2019	Jun. 30, 2020	Jun. 30, 2019
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 25,088	$ 25,743	$ 48,076	$ 51,648
Other comprehensive (loss) income:
Unrealized (loss) gain on derivative contracts	(4,369)	(679)	(21,397)	(5,145)
Reclassification of other comprehensive income (loss) to interest expense	1,198	17	1,312	(181)
Comprehensive income	21,917	25,081	27,991	46,322
Comprehensive income attributable to noncontrolling interests	3,334	6,048	4,692	11,168
Comprehensive income attributable to CoreSite Realty Corporation	$ 18,583	$ 19,033	$ 23,299	$ 35,154