CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2016	Dec. 31, 2015	Dec. 31, 2014
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 81,921	$ 56,859	$ 40,052
Other comprehensive income (loss):
Unrealized gain (loss) on derivative contracts	(1,112)	(2,426)	(1,409)
Reclassification of other comprehensive income to interest expense	1,740	1,930	1,134
Comprehensive income	82,549	56,363	39,777
Comprehensive income attributable to noncontrolling interests	23,242	21,724	17,137
Comprehensive income attributable to CoreSite Realty Corporation	$ 59,307	$ 34,639	$ 22,640