Summary of Combined Financial Information of Unconsolidated Entities, Balance Sheets (Detail) (USD $) In Thousands, unless otherwise specified	Dec. 31, 2012	Dec. 31, 2011	Dec. 31, 2010
ASSETS
Investment in real estate, net	$ 796,584	$ 866,184	$ 923,910
Other assets	56,631	61,377	40,975
Total Assets	853,215	927,561	964,885
LIABILITIES AND OWNERS' EQUITY
Mortgage notes payable	360,302	396,792	436,650
Other liabilities	13,866	16,547	16,436
Owners' equity	479,047	514,222	511,799
Total Liabilities and Owners' Equity	853,215	927,561	964,885
RPT's equity investments in unconsolidated joint ventures	$ 95,987	$ 97,020	$ 105,189