| In millions, except per share items | Jun-30-23 | Dec-31-22 | Jun-30-22 | Mar-31-22 | Dec-31-21 | Sep-30-21 | Jun-30-21 | Mar-31-21 |
| | 10-Q | 8-K | 10-Q | 10-Q | 10-K | 10-Q | 10-Q | 10-Q |
| Revenues | | | | | | | | |
| Real property | 863.5 | 674.3 | 814.3 | 548.5 | 542.4 | 684.3 | 603.9 | 442.0 |
| Real property growth | 6.0% | 24.3% | 34.8% | 24.1% | 41.2% | 70.9% | 99.1% | 42.4% |
| Home sales | 122.6 | 107.7 | 142.7 | 64.7 | | | 81.8 | 52.2 |
| Service, retail, dining and entertainment | 190.9 | 109.4 | 167.6 | 80.8 | 81.7 | 113.0 | 107.1 | 50.6 |
| Interest | 14.0 | 9.9 | 7.3 | 6.8 | 4.2 | 2.7 | 2.8 | 2.6 |
| Brokerage commissions and other, net | 9.8 | 7.5 | 8.6 | 8.0 | | | 6.9 | 6.0 |
| Total Revenues | 863.5 | 674.3 | 814.3 | 548.5 | 542.4 | 684.3 | 603.9 | 442.0 |
| Total Revenues growth | 6.0% | 24.3% | 34.8% | 24.1% | 41.2% | 70.9% | 99.1% | 42.4% |
| Expenses | | | | | | | | |
| Property operating and maintenance | 178.6 | | 160.4 | 129.3 | | 158.1 | 123.8 | 103.6 |
| Real estate tax | 30.0 | | 27.7 | 26.1 | 24.4 | 24.8 | 23.2 | 22.4 |
| Home costs and selling | 81.2 | | 92.9 | 45.9 | 151.0 | 56.6 | 58.8 | 41.6 |
| Service, retail, dining and entertainment | 171.7 | | 142.7 | 70.5 | | 87.1 | 84.7 | 45.4 |
| General and administrative | 62.3 | 69.8 | 62.2 | 55.7 | 54.7 | 43.3 | 45.3 | 38.2 |
| Catastrophic event-related charges, net | 0.1 | | 0.1 | | -0.9 | 0.3 | 0.4 | 2.4 |
| Depreciation and amortization | 164.1 | 154.8 | 150.1 | 148.5 | 144.6 | 127.1 | 127.1 | 123.9 |
| Asset impairments | 6.5 | | 0.1 | | | | | |
| Loss on extinguishment of debt | | | 0.1 | 0.3 | 0.0 | | 8.1 | |
| Interest | 79.2 | | 55.3 | 45.2 | 42.4 | 39.0 | 37.7 | 39.5 |
| Interest on mandatorily redeemable preferred OP units / equity | 0.9 | | 1.1 | 1.0 | 1.1 | 1.0 | 1.0 | 1.0 |
| Total Expenses | 774.6 | 224.6 | 707.7 | 523.0 | 521.5 | 537.3 | 509.9 | 419.2 |
| Income Before Other Items | 88.9 | 6.8 | 106.6 | | | | | |
| Gain / (loss) on remeasurement of marketable securities | 5.8 | | -32.3 | | | | | |
| Other income / (expense), net | -0.8 | | 0.4 | -0.6 | -2.1 | -9.4 | -0.2 | -0.5 |
| Gain / (loss) on dispositions of properties | -0.1 | | | | | | | |
| Income / (loss) from nonconsolidated affiliates | -0.7 | | 0.9 | | | | | |
| Gain on remeasurement of investment in nonconsolidated affiliates | | | 0.4 | | | | | |
| |
| Current tax expense | | | | | | | | |
| Deferred tax benefit | 7.7 | | 0.3 | | 1.0 | -1.2 | | 0.1 |
| Net Income | 97.5 | | 81.3 | 1.5 | 14.8 | 250.2 | 120.8 | 28.0 |
| Less: Preferred return to preferred OP units / equity interests | 3.3 | | 3.1 | 3.0 | | | 3.0 | 2.9 |
| Less: Income / (loss) attributable to noncontrolling interests | 4.4 | | 4.2 | -2.2 | -1.1 | 15.3 | 7.0 | 0.3 |
| Net Income Attributable to SUI Common Shareholders | 89.8 | | 74.0 | 0.7 | | 231.8 | 110.8 | 24.8 |
| |
| Weighted average common shares outstanding: | | | | | | | | |
| Weighted average common shares outstanding - basic (in shares) | 123.4 | 123.1 | 120.0 | 115.3 | 112.6 | 115.1 | 112.1 | 107.9 |
| Diluted weighted average common shares outstanding - diluted (in shares) | 123.4 | 125.8 | 120.0 | 115.9 | 115.1 | 118.1 | 112.1 | 108.2 |
| |
| Earnings per share: | | | | | | | | |
| Basic earning per share (in dollars per share) | $0.72 | $0.04 | $0.61 | $0.01 | $0.09 | $2.00 | $0.98 | $0.23 |
| Diluted earning per share (in dollars per share) | $0.72 | $0.04 | $0.61 | $0.01 | $0.09 | $2.00 | $0.98 | $0.23 |