Organization and Basis of Presentations (Details) $ / shares in Units, $ in Thousands, ft² in Millions	1 Months Ended	3 Months Ended		6 Months Ended
	Feb. 29, 2020 USD ($)	Jun. 30, 2020 USD ($) ft² joint_venture property $ / shares	Mar. 31, 2020	Jun. 30, 2020 USD ($) ft² joint_venture property $ / shares shares	Dec. 31, 2019 USD ($) $ / 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	$ 0.01
Number of joint ventures with real estate properties | joint_venture		5		5
Aggregate portfolio, percent leased		93.60%		93.60%
Sale of stock, maximum potential consideration	$ 100,000
Sale of stock, number of shares issued in transaction | shares				0
Accounts receivable, allowance for doubtful accounts		$ 7,130		$ 7,130	$ 1,037
COVID-19
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Operating lease, lease income, deferrals		19,700
Accounts receivable, credit loss expense (reversal)		5,500
Accounts receivable, allowance for doubtful accounts		$ 1,400		$ 1,400
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		49
Area of real estate property (in sq feet) | ft²		11.9		11.9