REAL ESTATE PROPERTY ACQUISITIONS AND ACQUIRED INTANGIBLES (Details)		3 Months Ended		6 Months Ended		12 Months Ended
		Jun. 30, 2022 USD ($) ft² a	Jun. 30, 2021 USD ($)	Jun. 30, 2022 USD ($) ft² a Integer shares	Jun. 30, 2021 USD ($)	Dec. 31, 2021 USD ($) ft² a
Property Acquisition [Line Items]
Amortization expense for lease intangibles		$ 2,198,000	$ 1,307,000	$ 4,663,000	$ 2,738,000
Above and below market lease intangibles incremental increase to rental Income		507,000	$ 245,000	$ 1,352,000	474,000
Maximum occupancy at acquisition date that defines an investment property as value-add				75.00%
Minimum percentage of acquisition cost used in redevelopment costs that defines an investment property as value-add				20.00%
Land		689,195,000		$ 689,195,000		$ 544,505,000
Building and building improvements		2,840,948,000		2,840,948,000		2,408,944,000
Tenant and other improvements		605,251,000		605,251,000		570,627,000
Right of use assets - Ground leases (operating)	[1]	$ 20,119,000		20,119,000		$ 22,635,000
Debt assumed in the purchase of real estate				$ 60,000,000	$ 0
2022 operating property acquisitions
Property Acquisition [Line Items]
Size (square feet) | ft²	[2]	1,706,000		1,706,000
Cost of property acquired	[2],[3]	$ 359,130,000		$ 359,130,000
2022 operating property acquisitions | Cebrian Distribution Center and Reed Distribution Center
Property Acquisition [Line Items]
Size (square feet) | ft²	[2],[4]	329,000		329,000
Date Acquired	[2],[4]			Jun. 01, 2022
Cost of property acquired	[2],[3],[4]	$ 49,726,000		$ 49,726,000
2022 operating property acquisitions | 6th Street Bus Cntr, Benicia Distrib Cntr 1-5, Ettie Bus Cntr, Laura Alice Bus Cntr, Preston Distrb Cntr, Sinclair Distrib Cntr, Transit Distrb Cntr and Whipple Bus Cntr
Property Acquisition [Line Items]
Size (square feet) | ft²	[2],[4]	1,377,000		1,377,000
Date Acquired	[2],[4]			Jun. 01, 2022
Cost of property acquired	[2],[3],[4]	$ 309,404,000		$ 309,404,000
2022 Value-Add Property Acquisitions
Property Acquisition [Line Items]
Size (square feet) | ft²	[5]	745,000		745,000
Cost of property acquired	[3],[5]	$ 101,794,000		$ 101,794,000
2022 Value-Add Property Acquisitions | Cypress Preserve 1 & 2
Property Acquisition [Line Items]
Size (square feet) | ft²	[5]	516,000		516,000
Date Acquired	[5]			Mar. 28, 2022
Cost of property acquired	[3],[5]	$ 54,462,000		$ 54,462,000
2022 Value-Add Property Acquisitions | Zephyr Distribution Center
Property Acquisition [Line Items]
Size (square feet) | ft²	[5]	82,000		82,000
Date Acquired	[5]			Apr. 08, 2022
Cost of property acquired	[3],[5]	$ 29,017,000		$ 29,017,000
2022 Value-Add Property Acquisitions | Mesa Gateway Commerce Park
Property Acquisition [Line Items]
Size (square feet) | ft²	[5]	147,000		147,000
Date Acquired	[5]			Apr. 15, 2022
Cost of property acquired	[3],[5]	$ 18,315,000		$ 18,315,000
2022 Acquisitions
Property Acquisition [Line Items]
Size (square feet) | ft²		2,451,000		2,451,000
Cost of property acquired	[3]	$ 460,924,000		$ 460,924,000
Land		126,067,000		126,067,000
Building and building improvements		315,996,000		315,996,000
Tenant and other improvements		11,502,000		11,502,000
Total real estate properties acquired		453,565,000		453,565,000
Assets acquired, net of liabilities assumed		$ 460,924,000		$ 460,924,000
Weighted average remaining lease term of acquired properties		3 years 8 months 12 days		3 years 8 months 12 days
2022 Acquisitions | Leases, Acquired-in-Place [Member]
Property Acquisition [Line Items]
Lease intangibles	[6]	$ 11,418,000		$ 11,418,000
2022 Acquisitions | Below market lease [Member]
Property Acquisition [Line Items]
Lease intangibles	[7]	(4,059,000)		(4,059,000)
2022 Acquisitions | Tulloch Corporation
Property Acquisition [Line Items]
Debt assumed in the purchase of real estate				$ 60,000,000
Noncash or Part Noncash Acquisition, Noncash Financial or Equity Instrument Consideration, Common Shares Issued | shares				1,868,809
Fair value of loans ssumed, asset acquisition				$ 60,000,000
Other Significant Noncash Transaction, Fair Value of Consideration Given, Common Shares Issued				$ 303,756,000
Number of land parcels acquired | Integer				2
2021 operating property acquisitions
Property Acquisition [Line Items]
Size (square feet) | ft²	[2]					760,000
Cost of property acquired	[2],[3]					$ 108,149,000
2021 operating property acquisitions | Southpark Distribution Center 2
Property Acquisition [Line Items]
Size (square feet) | ft²	[2]					79,000
Date Acquired	[2]					Jun. 10, 2021
Cost of property acquired	[2],[3]					$ 9,177,000
2021 operating property acquisitions | DFW Global Logistics Centre
Property Acquisition [Line Items]
Size (square feet) | ft²	[2]					611,000
Date Acquired	[2]					Aug. 26, 2021
Cost of property acquired	[2],[3]					$ 89,829,000
2021 operating property acquisitions | Progress Center 3
Property Acquisition [Line Items]
Size (square feet) | ft²	[2]					50,000
Date Acquired	[2]					Sep. 23, 2021
Cost of property acquired	[2],[3]					$ 5,000,000
2021 operating property acquisitions | Texas Avenue [Member]
Property Acquisition [Line Items]
Size (square feet) | ft²	[2]					20,000
Date Acquired	[2]					Oct. 15, 2021
Cost of property acquired	[2],[3]					$ 4,143,000
2021 Value-add Property Acquisitions
Property Acquisition [Line Items]
Size (square feet) | ft²	[5]					1,046,000
Cost of property acquired	[3],[5]					$ 171,076,000
2021 Value-add Property Acquisitions | Access Point 1
Property Acquisition [Line Items]
Size (square feet) | ft²	[5]					156,000
Date Acquired	[5]					Jan. 15, 2021
Cost of property acquired	[3],[5]					$ 10,501,000
2021 Value-add Property Acquisitions | Northpoint 200
Property Acquisition [Line Items]
Size (square feet) | ft²	[5]					79,000
Date Acquired	[5]					Jan. 21, 2021
Cost of property acquired	[3],[5]					$ 6,516,000
2021 Value-add Property Acquisitions | Access Point 2
Property Acquisition [Line Items]
Size (square feet) | ft²	[5]					159,000
Date Acquired	[5]					May 19, 2021
Cost of property acquired	[3],[5]					$ 10,743,000
2021 Value-add Property Acquisitions | Cherokee 75 Business Center 2
Property Acquisition [Line Items]
Size (square feet) | ft²	[5]					105,000
Date Acquired	[5]					Jun. 17, 2021
Cost of property acquired	[3],[5]					$ 8,837,000
2021 Value-add Property Acquisitions | Siempre Viva Distribution Center 3-6
Property Acquisition [Line Items]
Size (square feet) | ft²	[5]					547,000
Date Acquired	[5]					Dec. 01, 2021
Cost of property acquired	[3],[5]					$ 134,479,000
2021 Acquisitions
Property Acquisition [Line Items]
Size (square feet) | ft²						1,806,000
Cost of property acquired	[3]					$ 279,225,000
Land						42,554,000
Building and building improvements						225,645,000
Tenant and other improvements						4,907,000
Right of use assets - Ground leases (operating)						12,708,000
Total real estate properties acquired						285,814,000
Operating lease liabilities - Ground leases	[8]					(12,708,000)
Assets acquired, net of liabilities assumed						$ 279,225,000
Weighted average remaining lease term of acquired properties						2 years 10 months 24 days
2021 Acquisitions | Leases, Acquired-in-Place [Member]
Property Acquisition [Line Items]
Lease intangibles	[6]					$ 9,949,000
2021 Acquisitions | Above Market Leases [Member]
Property Acquisition [Line Items]
Lease intangibles	[6]					6,000
2021 Acquisitions | Below market lease [Member]
Property Acquisition [Line Items]
Lease intangibles	[7]					(3,836,000)
2021 development land acquisitions
Property Acquisition [Line Items]
Cost of property acquired						$ 41,065,000
Acres of real estate investment property | a						365.8
2022 development land acquisitions
Property Acquisition [Line Items]
Cost of property acquired		$ 54,751,000		$ 54,751,000
Acres of real estate investment property | a		177.5		177.5

[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] Operating properties are defined as stabilized real estate properties (land including buildings and improvements) in the Company’s operating portfolio; included in Real estate properties on the Consolidated Balance Sheets.

[3] epresents the sum of the purchase price, closing costs and capitalized acquisition costs.

[4] The Company acquired these operating properties along with two land parcels, also in Sacramento, CA and San Francisco, CA, in connection with its acquisition of Tulloch Corporation in June 2022. Size and cost are presented on an aggregate basis for the properties located in Sacramento, CA and San Francisco, CA, respectively. In consideration for this acquisition, the Company assumed a $60,000,000 loan and issued 1,868,809 shares of the Company’s common stock. The acquisition date fair value of the loan assumed was $60,000,000, and the acquisition date fair value of the common shares, which was based on the closing share price on the acquisition date, was $303,756,000.

[5] 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 acquisition date based on near term lease roll), or (2) 20% or greater of the acquisition cost will be spent to redevelop the property.

[6] In-place lease intangibles and above market lease intangibles are each included in Other assets on the Consolidated Balance Sheets. These costs are amortized over the remaining lives of the associated leases in place at the time of acquisition.

[7] Below market lease intangibles are included in Other liabilities on the Consolidated Balance Sheets. These costs are amortized over the remaining lives of the associated leases in place at the time of acquisition.

[8] Operating lease liabilities - Ground leases are included in Other liabilities on the Consolidated Balance Sheets.