Organization and Basis of Presentations (Details) $ / shares in Units, ft² in Millions, $ in Millions	1 Months Ended	3 Months Ended	12 Months Ended
	Feb. 29, 2020 USD ($)	Mar. 31, 2020 ft² property joint_venture $ / shares shares	Dec. 31, 2019 $ / shares
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Common shares of beneficial interest, par (in usd per share) | $ / shares		$ 0.01	$ 0.01
Number of joint ventures with real estate properties | joint_venture		5
Aggregate portfolio, percent leased		94.10%
Sale of stock, maximum potential consideration | $	$ 100.0
Sale of stock, number of shares issued in transaction | shares		0
RPT Realty, L.P.
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Ownership interest in Ramco-Gershenson Properties, L. P.		97.70%	97.70%
Shopping Centers
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Number of real estate properties owned and managed | property		49
Area of real estate property (in sq feet) | ft²		11.9