Organization and Basis of Presentations - Additional Information (Detail) $ in Thousands, ft² in Millions	9 Months Ended	12 Months Ended
	Sep. 30, 2017 USD ($) ft² property partnership_unit	Dec. 31, 2016 USD ($)
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Area of real estate property (in sq feet) | ft²	14.2
Number of joint ventures | partnership_unit	3
Ownership interest in Ramco-Gershenson Properties, L. P. (as a percent)	97.60%	97.60%
Other liabilities	$ 9,273	$ 9,893
Acquisitions, transaction costs capitalized	$ 600
Shopping Centers
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Number of real estate properties owned and managed | property	60
Joint Venture One
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Ownership interest (as a percent)	7.00%
Joint Venture Two
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Ownership interest (as a percent)	20.00%
Joint Venture Three
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Ownership interest (as a percent)	30.00%
Accounting Standards Update 2014-09
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Revenues requiring evaluation under ASU 2014-09 (less than) (as a percent)	20.00%
Revision Of Certain Special Assessment Obligations On Undeveloped Land | Restatement Adjustment
Error Corrections and Prior Period Adjustments Restatement [Line Items]
Other liabilities		$ 3,093