Equity Investments in Unconsolidated Joint Ventures - Additional Information (Detail) (USD $) In Thousands, unless otherwise specified	6 Months Ended				3 Months Ended
	Jun. 30, 2014 Contract PartnershipUnit	Jun. 30, 2014 Minimum	Jun. 30, 2014 Maximum	Jun. 30, 2014 Ramco 450 Venture LLC	Mar. 31, 2014 Ramco 450 Venture LLC Olentangy Plaza	Mar. 31, 2014 Ramco 450 Venture LLC Olentangy Plaza Ramco-Gershenson Properties Trust
Schedule of Equity Method Investments [Line Items]
Number of Joint Ventures	5
Percentage of ownership interest		7.00%	30.00%	20.00%
Repayments of long-term debt	$ 0				$ 7,500	$ 1,500