CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 19,319	$ 14,530	$ 58,760	$ 39,472
Other comprehensive income(loss):
Unrealized gain (loss) on derivative contracts	824	(2,947)	(3,597)	(3,807)
Reclassification of other comprehensive income to interest expense	432	567	1,338	1,371
Comprehensive income	20,575	12,150	56,501	37,036
Comprehensive income attributable to noncontrolling interests	5,423	4,469	16,214	15,016
Comprehensive income attributable to CoreSite Realty Corporation	$ 15,152	$ 7,681	$ 40,287	$ 22,020