Equity Investments in Unconsolidated Joint Ventures - Summary of Combined Financial Information of Unconsolidated Entities, Balance Sheets (Details) - USD ($) $ in Thousands	Jun. 30, 2020	Dec. 31, 2019
ASSETS
Investment in real estate, net	$ 1,486,852	$ 1,508,376
Other assets, net	82,575	86,836
TOTAL ASSETS	2,032,307	1,918,559
LIABILITIES AND OWNERS' EQUITY
Total liabilities	1,225,869	1,070,304
Owners' equity	787,353	828,240
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	2,032,307	1,918,559
Equity Method Investment, Nonconsolidated Investee or Group of Investees
ASSETS
Investment in real estate, net	230,332	233,531
Other assets, net	30,549	27,463
TOTAL ASSETS	260,881	260,994
LIABILITIES AND OWNERS' EQUITY
Total liabilities	18,259	15,943
Owners' equity	242,622	245,051
TOTAL LIABILITIES AND SHAREHOLDERS' EQUITY	260,881	260,994
RPT's equity investments in unconsolidated joint ventures	$ 128,804	$ 130,321