REAL ESTATE PROPERTIES (Details)		3 Months Ended		9 Months Ended
		Sep. 30, 2023 USD ($)	Sep. 30, 2022 USD ($)	Sep. 30, 2023 USD ($) Integer	Sep. 30, 2022 USD ($)	Dec. 31, 2022 USD ($)
Real Estate Properties [Line Items]
Number of Reporting Units | Integer				1
Depreciation Expense		$ 35,031,000	$ 32,052,000	$ 103,567,000	$ 92,159,000
Real Estate Properties
Land		808,077,000		808,077,000		$ 730,445,000
Building and building improvements		3,271,579,000		3,271,579,000		3,012,319,000
Tenant and other improvements		678,359,000		678,359,000		633,817,000
Right of use assets - Ground leases (operating)	[1]	18,340,000		18,340,000		19,391,000
Development and value-add properties	[2]	552,461,000		552,461,000		538,449,000
Real estate, development and value-add properties		5,328,816,000		5,328,816,000		4,934,421,000
Less accumulated depreciation		(1,246,312,000)		(1,246,312,000)		(1,150,814,000)
Real estate, net		$ 4,082,504,000		$ 4,082,504,000		$ 3,783,607,000
Building [Member]
Real Estate Properties [Line Items]
Property, Plant and Equipment, Useful Life		40 years		40 years
Minimum [Member] | Building and Building Improvements
Real Estate Properties [Line Items]
Property, Plant and Equipment, Useful Life		3 years		3 years
Maximum [Member] | Building and Building Improvements
Real Estate Properties [Line Items]
Property, Plant and Equipment, Useful Life		15 years		15 years

[1] EastGroup applies the principles of Financial Accounting Standards Board (“FASB”) Accounting Standards Codification (“ASC”) 842, Leases, and its related Accounting Standards Updates (“ASUs”) to account for its ground leases, which are classified as operating leases. The related operating lease liabilities for ground leases are included in Other liabilities on the Consolidated Balance Sheets.

[2] Value-add properties are defined as properties that are either acquired but not stabilized or can be converted to a higher and better use.  Acquired properties meeting either of the following two conditions are considered value-add properties:  (1) Less than 75% occupied as of the acquisition date (or will be less than 75% occupied within one year of the acquisition date based on near term lease termination), or (2) 20% or greater of the acquisition cost will be spent to redevelop the property.