Real Estate Acquisitions and Dispositions - Pro Forma (Details) - USD ($) $ / shares in Units, $ in Millions	3 Months Ended		12 Months Ended
	Mar. 31, 2023	Mar. 31, 2022	Dec. 31, 2022
Business Acquisition [Line Items]
Total Revenues	$ 651.2	$ 548.5
Net income	$ (30.1)	$ 0.7
Total revenues			$ 3,091.3
Net income attributable to SUI common shareholders			$ 241.2
Net income per share attributable to SUI common stockholders - basic (in dollars per share)			$ 1.99
Net income per share attributable to SUI common stockholders - diluted (in dollars per share)			$ 1.99
Park Holidays, Park Leisure, Jarrett Bay, and Montauk Yacht Club
Business Acquisition [Line Items]
Total Revenues			$ 353.6
Net income			$ 13.8