CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 27,279	$ 24,135	$ 55,845	$ 49,195
Other comprehensive income (loss):
Unrealized gain (loss) on derivative contracts	224	(323)	833	(10)
Reclassification of other comprehensive income (loss) to interest expense	(44)	170	(76)	467
Comprehensive income	27,459	23,982	56,602	49,652
Comprehensive income attributable to noncontrolling interests	7,942	6,363	16,373	13,224
Comprehensive income attributable to CoreSite Realty Corporation	$ 19,517	$ 17,619	$ 40,229	$ 36,428