CONDENSED CONSOLIDATED STATEMENTS OF OPERATIONS - USD ($) $ in Thousands	3 Months Ended		9 Months Ended
	Sep. 30, 2016	Sep. 30, 2015	Sep. 30, 2016	Sep. 30, 2015
Data center revenue:
Rental revenue	$ 54,219	$ 47,135	$ 156,954	$ 133,282
Power revenue	28,844	23,543	80,819	64,782
Interconnection revenue	13,374	11,400	39,093	32,210
Tenant reimbursement and other	2,826	2,357	6,982	6,049
Office, light-industrial and other revenue	2,011	1,947	5,996	6,050
Total operating revenues	101,274	86,382	289,844	242,373
Operating expenses:
Property operating and maintenance	28,283	24,203	78,522	65,965
Real estate taxes and insurance	3,524	3,216	9,659	8,421
Depreciation and amortization	26,981	24,347	77,978	71,209
Sales and marketing	4,465	3,775	13,187	11,813
General and administrative	9,432	8,644	26,970	24,461
Rent	5,967	5,440	16,718	15,690
Transaction Costs	117	6	126	51
Total operating expenses	78,769	69,631	223,160	197,610
Operating income	22,505	16,751	66,684	44,763
Gain on real estate disposal				36
Interest income	34	1	35	5
Interest expense	(3,222)	(2,188)	(7,914)	(5,183)
Income before income taxes	19,317	14,564	58,805	39,621
Income tax expense	2	(34)	(45)	(149)
Net income	19,319	14,530	58,760	39,472
Net income attributable to noncontrolling interests	5,055	5,526	17,031	16,193
Net income attributable to CoreSite Realty Corporation	14,264	9,004	41,729	23,279
Preferred stock dividends	(2,084)	(2,084)	(6,253)	(6,253)
Net income attributable to common shares	$ 12,180	$ 6,920	$ 35,476	$ 17,026
Net income per share attributable to common shares:
Basic (in dollars per share)	$ 0.36	$ 0.26	$ 1.11	$ 0.71
Diluted (in dollars per share)	$ 0.36	$ 0.26	$ 1.10	$ 0.69
Weighted average common shares outstanding
Basic (in shares)	33,425,762	26,126,332	31,906,000	24,029,106
Diluted (in shares)	33,912,155	26,549,537	32,361,367	24,544,612