CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2018	Sep. 30, 2017	Sep. 30, 2018	Sep. 30, 2017
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 25,020	$ 24,288	$ 80,865	$ 73,483
Other comprehensive income (loss):
Unrealized gain on derivative contracts	523	41	1,356	31
Reclassification of other comprehensive income (loss) to interest expense	(69)	87	(145)	554
Comprehensive income	25,474	24,416	82,076	74,068
Comprehensive income attributable to noncontrolling interests	6,534	6,483	22,907	19,707
Comprehensive income attributable to CoreSite Realty Corporation	$ 18,940	$ 17,933	$ 59,169	$ 54,361