CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended
	Mar. 31, 2017	Mar. 31, 2016
Data center revenue:
Rental revenue	$ 64,251	$ 50,371
Power revenue	30,861	25,574
Interconnection revenue	14,512	12,742
Tenant reimbursement and other	2,276	1,830
Office, light-industrial and other revenue	3,021	1,963
Total operating revenues	114,921	92,480
Operating expenses:
Property operating and maintenance	29,226	24,663
Real estate taxes and insurance	4,504	3,065
Depreciation and amortization	32,338	24,770
Sales and marketing	4,503	4,221
General and administrative	8,124	8,720
Rent	5,962	5,417
Transaction Costs		3
Total operating expenses	84,657	70,859
Operating income	30,264	21,621
Interest income		1
Interest expense	(5,107)	(2,012)
Income before income taxes	25,157	19,610
Income tax expense	(97)	(4)
Net income	25,060	19,606
Net income attributable to noncontrolling interests	6,684	6,261
Net income attributable to CoreSite Realty Corporation	18,376	13,345
Preferred stock dividends	(2,084)	(2,084)
Net income attributable to common shares	$ 16,292	$ 11,261
Net income per share attributable to common shares:
Basic (in dollars per share)	$ 0.49	$ 0.37
Diluted (in dollars per share)	$ 0.48	$ 0.37
Weighted average common shares outstanding
Basic (in shares)	33,558,787	30,252,693
Diluted (in shares)	33,981,776	30,694,747