CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2015	Jun. 30, 2014	Jun. 30, 2015	Jun. 30, 2014
CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 12,882	$ 10,638	$ 24,942	$ 18,756
Other comprehensive income(loss):
Unrealized gain (loss) on derivative contracts	448	(1,271)	(861)	(754)
Reclassification of other comprehensive income to interest expense	477	337	805	455
Comprehensive income	13,807	9,704	24,886	18,457
Comprehensive income attributable to noncontrolling interests	5,671	4,159	10,547	7,808
Comprehensive income attributable to CoreSite Realty Corporation	$ 8,136	$ 5,545	$ 14,339	$ 10,649