REAL ESTATE PROPERTIES - Sales of Real Estate (Details) $ in Thousands		12 Months Ended
		Dec. 31, 2022 USD ($) ft²	Dec. 31, 2021 USD ($) ft²	Dec. 31, 2020 USD ($) ft²
Real Estate Properties Sold
Right of Use Liability, Ground Lease		$ 19,906	$ 22,898
2022 Dispositions
Real Estate Properties Sold
Net Sales Price		51,006
Basis		10,007
Recognized Gain		$ 40,999
2021 Dispositions
Real Estate Properties Sold
Net Sales Price			44,260
Basis			5,401
Recognized Gain			$ 38,859
2020 Dispositions
Real Estate Properties Sold
Net Sales Price				$ 20,510
Basis				7,365
Recognized Gain				$ 13,145
University Business Center 120 [Member]
Real Estate Properties Sold
Less Than Wholly Owned Joint Venture Investment Ownership Percentage				80.00%
Less Than Wholly Owned Joint Venture Investment Ownership Percentage Sold				80.00%
Metro Business Park [Member] | 2022 Dispositions
Real Estate Properties Sold
Size (square feet) | ft²		189,000
Date Sold		Jan. 06, 2022
Net Sales Price		$ 32,851
Basis		5,880
Recognized Gain		$ 26,971
Cypress Creek Business Park [Member] | 2022 Dispositions
Real Estate Properties Sold
Size (square feet) | ft²	[1]	56,000
Date Sold	[1]	Mar. 31, 2022
Net Sales Price	[1]	$ 5,282
Basis	[1]	1,901
Recognized Gain	[1]	3,381
Right of Use Asset, Ground Lease		1,745
Right of Use Liability, Ground Lease		$ 1,745
World Houston 15 East | 2022 Dispositions
Real Estate Properties Sold
Size (square feet) | ft²		42,000
Date Sold		May 11, 2022
Net Sales Price		$ 12,873
Basis		2,226
Recognized Gain		$ 10,647
Jetport Commerce Park [Member] | 2021 Dispositions
Real Estate Properties Sold
Size (square feet) | ft²			284,000
Date Sold			Nov. 09, 2021
Net Sales Price			$ 44,260
Basis			5,401
Recognized Gain			$ 38,859
University Business Center 120 [Member] | 2020 Dispositions
Real Estate Properties Sold
Size (square feet) | ft²	[2]			46,000
Date Sold	[2]			Dec. 01, 2020
Net Sales Price	[2]			$ 10,342
Basis	[2]			4,007
Recognized Gain	[2]			$ 6,335
Central Green Distribution Center [Member] | 2020 Dispositions
Real Estate Properties Sold
Size (square feet) | ft²				80,000
Date Sold				Dec. 23, 2020
Net Sales Price				$ 10,168
Basis				3,358
Recognized Gain				$ 6,810

[1] Cypress Creek Business Park is located on a ground lease. In conjunction with the sale of the property, the Company fully amortized the associated right-of-use asset and liability of $1,745,000.

[2] EastGroup owned 80% of University Business Center 120 through a joint venture partnership. EastGroup sold its 80% share of the joint venture, and the partnership was dissolved. The information shown for this transaction represents EastGroup’s 80% ownership.