Investments in Real Estate Partnerships - Schedule of Investments in Real Estate Partnerships (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2019 USD ($) property		Dec. 31, 2018 USD ($) property	Dec. 31, 2017 USD ($)
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		0.00%		0.00%
Real Estate Partnerships, Number of Properties | property		116		120
Investments in real estate partnerships		$ 469,522		$ 463,001
Total Assets of the Partnership		3,158,884		3,227,831
Income (Loss) from Equity Method Investments		60,956		42,974	$ 43,341
Net Income (Loss) of the Partnership		$ 171,204		$ 129,085	$ 139,958
GRI - Regency, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		40.00%		40.00%
Real Estate Partnerships, Number of Properties | property		68		70
Investments in real estate partnerships		$ 187,597		$ 189,381
Total Assets of the Partnership		1,612,459		1,646,448
Income (Loss) from Equity Method Investments		43,536		29,614
Net Income (Loss) of the Partnership		$ 96,721		$ 74,139
Equity One JV Portfolio, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		30.00%	[1]	30.00%
Real Estate Partnerships, Number of Properties | property		6	[1]	6
Investments in real estate partnerships		$ 41,422	[1]	$ 54,250
Total Assets of the Partnership		260,512	[1]	277,626
Income (Loss) from Equity Method Investments		(9,967)	[1]	490
Net Income (Loss) of the Partnership		$ (5,832)	[1]	$ 2,239
Columbia Regency Retail Partners, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		20.00%		20.00%
Real Estate Partnerships, Number of Properties | property		7		7
Investments in real estate partnerships		$ 9,201		$ 13,625
Total Assets of the Partnership		139,253		141,807
Income (Loss) from Equity Method Investments		1,626		1,311
Net Income (Loss) of the Partnership		$ 8,406		$ 6,650
Columbia Regency Retail Partners, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		20.00%		20.00%
Real Estate Partnerships, Number of Properties | property		13		13
Investments in real estate partnerships		$ 39,453		$ 38,110
Total Assets of the Partnership		385,960		377,121
Income (Loss) from Equity Method Investments		1,748		4,673
Net Income (Loss) of the Partnership		$ 8,742		$ 23,367
Cameron Village, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		30.00%		30.00%
Real Estate Partnerships, Number of Properties | property		1		1
Investments in real estate partnerships		$ 10,641		$ 11,169
Total Assets of the Partnership		96,101		98,633
Income (Loss) from Equity Method Investments		1,062		943
Net Income (Loss) of the Partnership		$ 3,572		$ 3,177
RegCal, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		25.00%		25.00%
Real Estate Partnerships, Number of Properties | property		6		7
Investments in real estate partnerships		$ 26,417		$ 31,235
Total Assets of the Partnership		109,226		139,844
Income (Loss) from Equity Method Investments		3,796		1,542
Net Income (Loss) of the Partnership		$ 16,276		$ 6,167
US Regency Retail 1, LLC [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage	[2]	20.01%		20.01%
Real Estate Partnerships, Number of Properties | property	[2]	7		7
Investments in real estate partnerships	[2]	$ 0		$ 0
Total Assets of the Partnership	[2]	87,231		89,524
Income (Loss) from Equity Method Investments	[2]	1,028		937
Net Income (Loss) of the Partnership	[2]	$ 5,137		$ 4,685
Other Investments in Real Estate Partnerships [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		35.00%		9.38%
Real Estate Partnerships, Number of Properties | property		8	[3]	9
Investments in real estate partnerships		$ 154,791	[3]	$ 125,231
Total Assets of the Partnership		468,142	[3]	456,828
Income (Loss) from Equity Method Investments		18,127	[3]	3,464
Net Income (Loss) of the Partnership		$ 38,182	[3]	$ 8,661
Other Investments in Real Estate Partnerships [Member] | Minimum [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		18.38%	[3]	9.375%
Other Investments in Real Estate Partnerships [Member] | Maximum [Member]
Schedule of Equity Method Investments [Line Items]
Ownership Percentage		50.00%	[3]	50.00%

[1] During the third quarter of 2019, a $10.9 million impairment of real estate was recognized within the NYC partnership from changes in the expected hold periods of various properties.

[2] The USAA partnership has distributed proceeds from debt refinancing and real estate sales in excess of Regency’s carrying value of its investment resulting in a negative investment balance of $3.9 million, which is recorded within Accounts Payable and other liabilities in the Consolidated Balance Sheets.

[3] Includes our investment in the Town and Country shopping center, which began with an initial 9.38% ownership percent in 2018, with an additional 9.0% interest acquired during 2019.  In January 2020, we purchased our remaining 16.62% interest, bringing our total ownership interest to 35%.