CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2017	Jun. 30, 2016	Jun. 30, 2017	Jun. 30, 2016
Data center revenue:
Rental revenue	$ 64,853	$ 52,364	$ 129,104	$ 102,735
Power revenue	32,410	26,401	63,271	51,975
Interconnection revenue	15,325	12,977	29,837	25,719
Tenant reimbursement and other	2,329	2,326	4,605	4,156
Office, light-industrial and other revenue	2,969	2,022	5,990	3,985
Total operating revenues	117,886	96,090	232,807	188,570
Operating expenses:
Property operating and maintenance	31,781	25,576	61,007	50,239
Real estate taxes and insurance	3,824	3,070	8,328	6,135
Depreciation and amortization	32,207	26,227	64,545	50,997
Sales and marketing	4,414	4,501	8,917	8,722
General and administrative	9,508	8,818	17,632	17,538
Rent	5,931	5,334	11,893	10,751
Transaction Costs	139	6	139	9
Total operating expenses	87,804	73,532	172,461	144,391
Operating income	30,082	22,558	60,346	44,179
Interest expense	(5,958)	(2,680)	(11,065)	(4,691)
Income before income taxes	24,124	19,878	49,281	39,488
Income tax benefit (expense)	11	(43)	(86)	(47)
Net income	24,135	19,835	49,195	39,441
Net income attributable to noncontrolling interests	6,407	5,715	13,091	11,976
Net income attributable to CoreSite Realty Corporation	17,728	14,120	36,104	27,465
Preferred stock dividends	(2,085)	(2,085)	(4,169)	(4,169)
Net income attributable to common shares	$ 15,643	$ 12,035	$ 31,935	$ 23,296
Net income per share attributable to common shares:
Basic (in dollars per share)	$ 0.46	$ 0.38	$ 0.95	$ 0.75
Diluted (in dollars per share)	$ 0.46	$ 0.37	$ 0.94	$ 0.74
Weighted average common shares outstanding
Basic (in shares)	33,835,727	32,022,845	33,698,022	31,137,769
Diluted (in shares)	34,053,816	32,435,606	34,009,930	31,554,157