Real Estate Acquisitions, Pro Forma (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2021	Jun. 30, 2020	Jun. 30, 2021	Jun. 30, 2020
Acquisitions - 2019
Business Acquisition [Line Items]
Total revenues		$ 304,552		$ 616,121
Net income attributable to Sun Communities, Inc. common stockholders		$ 59,421		$ 43,782
Net income per share attributable to Sun Communities, Inc. common stockholders - basic		$ 0.62		$ 0.47
Net income per share attributable to Sun Communities, Inc. common stockholders - diluted		$ 0.62		$ 0.46
Acquisitions - 2020
Business Acquisition [Line Items]
Total revenues	$ 605,163		$ 1,048,426
Net income attributable to Sun Communities, Inc. common stockholders	$ 111,075		$ 136,258
Net income per share attributable to Sun Communities, Inc. common stockholders - basic	$ 0.99		$ 1.24
Net income per share attributable to Sun Communities, Inc. common stockholders - diluted	$ 0.99		$ 1.24