| Fiscal period | 2020 | 2019 | 2018 | 2017 | 2016 | 2015 | 2014 | 2013 | 2012 | 2011 |
|---|
| Period End Date | 12/31/2020 | 12/31/2019 | 12/31/2018 | 12/31/2017 | 12/31/2016 | 12/31/2015 | 12/31/2014 | 12/31/2013 | 12/31/2012 | 12/31/2011 |
|---|
| Operating Revenues:Rental revenue | 512.34 | 485.13 | 463.09 | 407.68 | 338.69 | 183.30 | 149.29 | 131.08 | 116.15 | 101.45 |
| Operating Revenues:Tenant reimbursement | -- | -- | -- | -- | -- | 8.30 | 8.70 | 7.32 | 7.09 | 6.61 |
| Operating Revenues:Power revenue | -- | -- | -- | -- | -- | 89.50 | 71.23 | 59.66 | 53.67 | 43.66 |
| Operating Revenues:Other revenue | 10.41 | 11.85 | 11.60 | 11.85 | 8.59 | 7.97 | 7.84 | 7.84 | 8.39 | 8.45 |
| Operating Revenues- Interconnection Revenue | 84.07 | 75.75 | 69.71 | 62.29 | 53.08 | 44.23 | 35.36 | 28.93 | 21.64 | 12.68 |
| Total operating revenues | 606.82 | 572.73 | 544.39 | 481.82 | 400.35 | 333.29 | 272.42 | 234.83 | 206.93 | 172.85 |
| Rent | 36.55 | 32.62 | 27.70 | 24.13 | 22.63 | 21.08 | 20.40 | 19.66 | 18.71 | 18.34 |
| Property operating and maintenance | 169.86 | 157.29 | 152.36 | 132.82 | 107.21 | 89.81 | 75.12 | 64.26 | 61.24 | 55.05 |
| Management fees to related party | -- | -- | -- | -- | -- | -- | -- | -- | -- | -- |
| Real estate taxes and insurance | 24.00 | 22.87 | 19.24 | 14.91 | 14.25 | 12.14 | 7.58 | 8.46 | 8.77 | 9.12 |
| Depreciation and amortization | 168.92 | 152.93 | 141.63 | 129.25 | 108.65 | 95.70 | 80.72 | 65.79 | 64.33 | 68.97 |
| General and administrative | 44.03 | 43.76 | 40.09 | 37.55 | 35.37 | 34.18 | 27.84 | 27.32 | 25.91 | 21.85 |
| Sales and marketing | 23.73 | 22.44 | 21.02 | 18.18 | 17.50 | 15.93 | 14.55 | 14.41 | 10.33 | 5.74 |
| Transaction costs | -- | -- | (0.08) | (0.18) | (0.13) | (0.05) | (0.06) | (0.28) | (0.61) | (0.88) |
| Impairment of internal-use software | -- | -- | -- | -- | -- | (0.32) | (1.96) | -- | -- | -- |
| Total operating expenses | 467.07 | 431.91 | 402.11 | 357.01 | 305.74 | 269.21 | 228.23 | 200.16 | 189.89 | 179.94 |
| Operating loss | 139.76 | 140.82 | 142.28 | 124.81 | 94.62 | 64.08 | 44.19 | 34.67 | 17.04 | (7.09) |
| Interest expense | 45.09 | 41.71 | 35.53 | 24.15 | 12.58 | 7.10 | 5.31 | 2.69 | 5.24 | 5.28 |
| Gain on land disposal | -- | -- | -- | -- | -- | 0.04 | 1.21 | -- | -- | -- |
| Interest income | -- | -- | -- | -- | -- | -- | 0.01 | 0.03 | 0.01 | 0.12 |
| Gain (loss) on early extinguishment of debt | -- | -- | -- | -- | -- | -- | -- | -- | -- | 0.94 |
| Income (Loss) before income taxes | 94.67 | 99.10 | 106.75 | 100.67 | 82.04 | 57.02 | 40.09 | 32.01 | 11.82 | (11.31) |
| Income taxes | 0.06 | 0.07 | (0.01) | 0.17 | 0.12 | 0.16 | 0.04 | 0.40 | 1.10 | (0.53) |
| Net income (loss) Before attributable to noncontrolling interests | 94.62 | 99.04 | 106.76 | 100.49 | 81.92 | 56.86 | 40.05 | 31.61 | 10.72 | (10.78) |
| Net income (loss) attributable to noncontrolling interests | 15.31 | 23.20 | 28.84 | 25.64 | 23.21 | 22.15 | 17.29 | 12.77 | 5.67 | (6.17) |
| Net income (loss) attributable to CoreSite Realty Corporation | 79.31 | 75.84 | 77.92 | 74.86 | 58.71 | 34.71 | 22.77 | 18.84 | 5.05 | (4.61) |
| Less: Preferred stock dividends | -- | -- | -- | 7.92 | 8.34 | 8.34 | 8.34 | 8.34 | 0.44 | -- |
| Original issuance costs associated with redeemed preferred stock | -- | -- | -- | 4.33 | 0.00 | -- | -- | -- | -- | -- |
| Net Income (loss) attributable to common shares | 79.31 | 75.84 | 77.92 | 62.61 | 50.37 | 26.37 | 14.43 | 10.50 | 4.61 | (4.61) |
| Net Income (loss) per share attributable to common shares -Basic | 1.96 | 2.06 | 2.23 | 1.85 | 1.56 | 1.05 | 0.68 | 0.50 | 0.22 | (0.24) |
| Net Income (loss) per share attributable to common shares -Diluted | 1.95 | 2.05 | 2.22 | 1.84 | 1.54 | 1.03 | 0.66 | 0.49 | 0.22 | (0.24) |
| Weighted average common shares outstanding-Basic | 40.45 | 36.77 | 34.96 | 33.79 | 32.29 | 25.22 | 21.16 | 20.83 | 20.54 | 19.61 |
| Weighted average common shares outstanding-Diluted | 40.63 | 36.94 | 35.14 | 34.06 | 32.73 | 25.71 | 21.74 | 21.50 | 20.99 | 19.61 |
| FFO attributable to common shares and units | 256.85 | 246.08 | 243.22 | 212.09 | 176.72 | 135.77 | 104.46 | 85.31 | 71.98 | 56.89 |