REAL ESTATE PROPERTIES - Development and Value-Add Disclosures (Details)		12 Months Ended
		Dec. 31, 2021 USD ($) ft²	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)
Real Estate [Line Items]
Interest costs capitalized on development properties		$ 9,028,000	$ 9,651,000	$ 8,453,000
Internal Development Costs Capitalized During Period		7,713,000	6,689,000	6,918,000
Improvements And Developments Transfers To Real Estate Properties		13,236,000
Development costs incurred, for the period		$ 418,855,000	$ 195,446,000	$ 318,288,000
Lease Up [Member]
Real Estate [Line Items]
Size | ft²		1,208,000
Costs Transferred In Current Year	[1]	$ 7,703,000
Development costs incurred, for the period		176,520,000
Development and value-add properties		184,223,000
Estimated Total Cumulative Development Costs	[2]	$ 193,600,000
Lease Up [Member] | Access Point 1
Real Estate [Line Items]
Size | ft²	[3]	156,000
Costs Transferred In Current Year	[1],[3]	$ 0
Development costs incurred, for the period	[3]	12,522,000
Development and value-add properties	[3]	12,522,000
Estimated Total Cumulative Development Costs	[2],[3]	$ 13,300,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)	[3]	01/22
Lease Up [Member] | Access Point 2
Real Estate [Line Items]
Size | ft²	[3]	159,000
Costs Transferred In Current Year	[1],[3]	$ 0
Development costs incurred, for the period	[3]	11,631,000
Development and value-add properties	[3]	11,631,000
Estimated Total Cumulative Development Costs	[2],[3]	$ 13,100,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)	[3]	05/22
Lease Up [Member] | Grand Oaks 75 3
Real Estate [Line Items]
Size | ft²		136,000
Costs Transferred In Current Year	[1]	$ 2,198,000
Development costs incurred, for the period		7,994,000
Development and value-add properties		10,192,000
Estimated Total Cumulative Development Costs	[2]	$ 12,400,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		07/22
Lease Up [Member] | Horizon West 2 & 3
Real Estate [Line Items]
Size | ft²		210,000
Costs Transferred In Current Year	[1]	$ 5,505,000
Development costs incurred, for the period		11,685,000
Development and value-add properties		17,190,000
Estimated Total Cumulative Development Costs	[2]	$ 19,200,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		09/22
Lease Up [Member] | Siempre Viva 3-6
Real Estate [Line Items]
Size | ft²	[3]	547,000
Costs Transferred In Current Year	[1],[3]	$ 0
Development costs incurred, for the period	[3]	132,688,000
Development and value-add properties	[3]	132,688,000
Estimated Total Cumulative Development Costs	[2],[3]	$ 135,600,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)	[3]	12/22
Under construction [Member]
Real Estate [Line Items]
Size | ft²		2,697,000
Costs Transferred In Current Year	[1]	$ 59,356,000
Development costs incurred, for the period		128,278,000
Development and value-add properties		192,388,000
Estimated Total Cumulative Development Costs	[2]	$ 331,100,000
Under construction [Member] | Speed Distribution Center
Real Estate [Line Items]
Size | ft²		519,000
Costs Transferred In Current Year	[1],[4]	$ 17,758,000
Development costs incurred, for the period		50,060,000
Development and value-add properties		67,818,000
Estimated Total Cumulative Development Costs	[2]	$ 88,600,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		03/22
Under construction [Member] | SunCoast Commerce Center 12
Real Estate [Line Items]
Size | ft²		79,000
Costs Transferred In Current Year	[1]	$ 960,000
Development costs incurred, for the period		3,218,000
Development and value-add properties		4,178,000
Estimated Total Cumulative Development Costs	[2]	$ 8,000,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		06/22
Under construction [Member] | Creekview 9 & 10
Real Estate [Line Items]
Size | ft²		145,000
Costs Transferred In Current Year	[1]	$ 4,350,000
Development costs incurred, for the period		6,986,000
Development and value-add properties		11,336,000
Estimated Total Cumulative Development Costs	[2]	$ 17,200,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		07/22
Under construction [Member] | Steele Creek 8
Real Estate [Line Items]
Size | ft²		72,000
Costs Transferred In Current Year	[1]	$ 1,869,000
Development costs incurred, for the period		859,000
Development and value-add properties		2,728,000
Estimated Total Cumulative Development Costs	[2]	$ 8,400,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		08/22
Under construction [Member] | Basswood 1 & 2
Real Estate [Line Items]
Size | ft²		237,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		10,475,000
Development and value-add properties		15,229,000
Estimated Total Cumulative Development Costs	[2]	$ 22,100,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		02/23
Under construction [Member] | Gateway Commerce Park 3
Real Estate [Line Items]
Size | ft²		133,000
Costs Transferred In Current Year	[1]	$ 6,791,000
Development costs incurred, for the period		6,375,000
Development and value-add properties		13,166,000
Estimated Total Cumulative Development Costs	[2]	$ 19,100,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		04/23
Under construction [Member] | Grand Oaks 75 4
Real Estate [Line Items]
Size | ft²		185,000
Costs Transferred In Current Year	[1]	$ 3,313,000
Development costs incurred, for the period		3,065,000
Development and value-add properties		6,378,000
Estimated Total Cumulative Development Costs	[2]	$ 17,900,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		04/23
Under construction [Member] | Tri-County Crossing 5
Real Estate [Line Items]
Size | ft²		105,000
Costs Transferred In Current Year	[1]	$ 1,328,000
Development costs incurred, for the period		4,272,000
Development and value-add properties		5,600,000
Estimated Total Cumulative Development Costs	[2]	$ 10,300,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		04/23
Under construction [Member] | Americas Ten 2
Real Estate [Line Items]
Size | ft²		168,000
Costs Transferred In Current Year	[1]	$ 2,885,000
Development costs incurred, for the period		6,215,000
Development and value-add properties		9,100,000
Estimated Total Cumulative Development Costs	[2]	$ 14,100,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		05/23
Under construction [Member] | Grand West Crossing 1
Real Estate [Line Items]
Size | ft²		121,000
Costs Transferred In Current Year	[1]	$ 3,492,000
Development costs incurred, for the period		5,377,000
Development and value-add properties		8,869,000
Estimated Total Cumulative Development Costs	[2]	$ 15,700,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		05/23
Under construction [Member] | 45 Crossing
Real Estate [Line Items]
Size | ft²		177,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		17,060,000
Development and value-add properties		17,060,000
Estimated Total Cumulative Development Costs	[2]	$ 26,200,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		06/23
Under construction [Member] | McKinney 3 & 4
Real Estate [Line Items]
Size | ft²		212,000
Costs Transferred In Current Year	[1]	$ 5,120,000
Development costs incurred, for the period		5,318,000
Development and value-add properties		10,438,000
Estimated Total Cumulative Development Costs	[2]	$ 26,300,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		06/23
Under construction [Member] | Ridgeview 3
Real Estate [Line Items]
Size | ft²		88,000
Costs Transferred In Current Year	[1]	$ 1,443,000
Development costs incurred, for the period		4,361,000
Development and value-add properties		5,804,000
Estimated Total Cumulative Development Costs	[2]	$ 10,700,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		06/23
Under construction [Member] | Tri-County Crossing 6
Real Estate [Line Items]
Size | ft²		124,000
Costs Transferred In Current Year	[1]	$ 1,576,000
Development costs incurred, for the period		2,206,000
Development and value-add properties		3,782,000
Estimated Total Cumulative Development Costs	[2]	$ 9,900,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		06/23
Under construction [Member] | Lakeport 4 & 5
Real Estate [Line Items]
Size | ft²		177,000
Costs Transferred In Current Year	[1]	$ 6,668,000
Development costs incurred, for the period		1,270,000
Development and value-add properties		7,938,000
Estimated Total Cumulative Development Costs	[2]	$ 22,400,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		08/23
Under construction [Member] | I-20 West Business Center
Real Estate [Line Items]
Size | ft²		155,000
Costs Transferred In Current Year	[1]	$ 1,803,000
Development costs incurred, for the period		1,161,000
Development and value-add properties		2,964,000
Estimated Total Cumulative Development Costs	[2]	$ 14,200,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		10/23
Prospective Development [Member]
Real Estate [Line Items]
Size | ft²		6,937,000
Costs Transferred In Current Year	[1]	$ (49,301,000)
Development costs incurred, for the period		43,680,000
Development and value-add properties		$ 128,003,000
Prospective Development [Member] | Fort Myers [Member]
Real Estate [Line Items]
Size | ft²		543,000
Costs Transferred In Current Year	[1]	$ (960,000)
Development costs incurred, for the period		1,392,000
Development and value-add properties		$ 8,298,000
Prospective Development [Member] | Miami [Member]
Real Estate [Line Items]
Size | ft²		243,000
Costs Transferred In Current Year	[1]	$ (6,791,000)
Development costs incurred, for the period		826,000
Development and value-add properties		$ 14,331,000
Prospective Development [Member] | Orlando [Member]
Real Estate [Line Items]
Size | ft²		1,278,000
Costs Transferred In Current Year	[1]	$ (5,505,000)
Development costs incurred, for the period		4,065,000
Development and value-add properties		$ 26,238,000
Prospective Development [Member] | Tampa [Member]
Real Estate [Line Items]
Size | ft²		32,000
Costs Transferred In Current Year	[1]	$ (5,511,000)
Development costs incurred, for the period		613,000
Development and value-add properties		$ 825,000
Prospective Development [Member] | Atlanta [Member]
Real Estate [Line Items]
Size | ft²		580,000
Costs Transferred In Current Year	[1]	$ (1,803,000)
Development costs incurred, for the period		5,469,000
Development and value-add properties		$ 5,058,000
Prospective Development [Member] | Jackson [Member]
Real Estate [Line Items]
Size | ft²		28,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		0
Development and value-add properties		$ 706,000
Prospective Development [Member] | Charlotte [Member]
Real Estate [Line Items]
Size | ft²		1,387,000
Costs Transferred In Current Year	[1]	$ (1,869,000)
Development costs incurred, for the period		12,648,000
Development and value-add properties		$ 15,104,000
Prospective Development [Member] | Dallas [Member]
Real Estate [Line Items]
Size | ft²		172,000
Costs Transferred In Current Year	[1]	$ (16,138,000)
Development costs incurred, for the period		1,658,000
Development and value-add properties		$ 8,398,000
Prospective Development [Member] | El Paso [Member]
Real Estate [Line Items]
Size | ft²		0
Costs Transferred In Current Year	[1]	$ (2,885,000)
Development costs incurred, for the period		298,000
Development and value-add properties		$ 0
Prospective Development [Member] | Houston [Member]
Real Estate [Line Items]
Size | ft²		1,293,000
Costs Transferred In Current Year	[1]	$ (3,492,000)
Development costs incurred, for the period		7,567,000
Development and value-add properties		$ 24,833,000
Prospective Development [Member] | San Antonio [Member]
Real Estate [Line Items]
Size | ft²		55,000
Costs Transferred In Current Year	[1]	$ (4,347,000)
Development costs incurred, for the period		200,000
Development and value-add properties		$ 718,000
Prospective Development [Member] | Greenville [Member]
Real Estate [Line Items]
Size | ft²		400,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		1,736,000
Development and value-add properties		$ 1,736,000
Prospective Development [Member] | Austin [Member]
Real Estate [Line Items]
Size | ft²		274,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		6,431,000
Development and value-add properties		$ 6,431,000
Prospective Development [Member] | Ft. Worth
Real Estate [Line Items]
Size | ft²		652,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		777,000
Development and value-add properties		$ 15,327,000
Lease Up, Construction, And Prospective Development [Member]
Real Estate [Line Items]
Size | ft²		10,842,000
Costs Transferred In Current Year	[1]	$ 17,758,000
Development costs incurred, for the period		348,478,000
Development and value-add properties		504,614,000
Development obligations		88,700,000
Tenant improvement obligations		$ 10,300,000
Development completed and transferred to Real estate properties [Member]
Real Estate [Line Items]
Size | ft²		2,688,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		51,082,000
Development and value-add properties	[5]	$ 272,292,000
Development completed and transferred to Real estate properties [Member] | Gilbert Crossroads A & B [Member]
Real Estate [Line Items]
Size | ft²		140,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		0
Development and value-add properties	[5]	$ 16,768,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		01/21
Development completed and transferred to Real estate properties [Member] | Creek View 121 7 & 8 [Member]
Real Estate [Line Items]
Size | ft²		137,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		1,099,000
Development and value-add properties	[5]	$ 17,658,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		03/21
Development completed and transferred to Real estate properties [Member] | Hurricane Shoals 3 [Member]
Real Estate [Line Items]
Size | ft²		101,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		124,000
Development and value-add properties	[5]	$ 8,935,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		03/21
Development completed and transferred to Real estate properties [Member] | Northpoint 200 [Member]
Real Estate [Line Items]
Size | ft²	[3]	79,000
Costs Transferred In Current Year	[1],[3]	$ 0
Development costs incurred, for the period	[3]	6,861,000
Development and value-add properties	[3],[5]	$ 6,861,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)	[3]	03/21
Development completed and transferred to Real estate properties [Member] | Rancho Distribution Center
Real Estate [Line Items]
Size | ft²	[3]	162,000
Costs Transferred In Current Year	[1],[3]	$ 0
Development costs incurred, for the period	[3]	0
Development and value-add properties	[3],[5]	$ 27,325,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)	[3]	03/21
Development completed and transferred to Real estate properties [Member] | World Houston 44 [Member]
Real Estate [Line Items]
Size | ft²		134,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		399,000
Development and value-add properties	[5]	$ 8,525,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		05/21
Development completed and transferred to Real estate properties [Member] | Gateway Commerce Park 4
Real Estate [Line Items]
Size | ft²		197,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		641,000
Development and value-add properties	[5]	$ 22,688,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		06/21
Development completed and transferred to Real estate properties [Member] | Interstate Commons II [Member]
Real Estate [Line Items]
Size | ft²	[3]	142,000
Costs Transferred In Current Year	[1],[3]	$ 0
Development costs incurred, for the period	[3]	50,000
Development and value-add properties	[3],[5]	$ 12,291,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)	[3]	06/21
Development completed and transferred to Real estate properties [Member] | Settlers Crossing 3 & 4 [Member]
Real Estate [Line Items]
Size | ft²		173,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		2,477,000
Development and value-add properties	[5]	$ 19,981,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		06/21
Development completed and transferred to Real estate properties [Member] | SunCoast 7
Real Estate [Line Items]
Size | ft²		77,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		276,000
Development and value-add properties	[5]	$ 7,649,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		06/21
Development completed and transferred to Real estate properties [Member] | Tri-County Crossing 3 & 4 [Member]
Real Estate [Line Items]
Size | ft²		203,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		1,000,000
Development and value-add properties	[5]	$ 15,409,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		06/21
Development completed and transferred to Real estate properties [Member] | Cherokee 75 Business Center 2
Real Estate [Line Items]
Size | ft²	[3]	105,000
Costs Transferred In Current Year	[1],[3]	$ 0
Development costs incurred, for the period	[3]	9,052,000
Development and value-add properties	[3],[5]	$ 9,052,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)	[3]	07/21
Development completed and transferred to Real estate properties [Member] | Northwest Crossing 1-3 [Member]
Real Estate [Line Items]
Size | ft²		278,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		1,497,000
Development and value-add properties	[5]	$ 23,819,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		09/21
Development completed and transferred to Real estate properties [Member] | Ridgeview 1 & 2 [Member]
Real Estate [Line Items]
Size | ft²		226,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		2,021,000
Development and value-add properties	[5]	$ 19,114,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		10/21
Development completed and transferred to Real estate properties [Member] | Gilbert Crossroads C & D [Member]
Real Estate [Line Items]
Size | ft²		178,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		14,955,000
Development and value-add properties	[5]	$ 21,572,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		12/21
Development completed and transferred to Real estate properties [Member] | LakePort 1-3 [Member]
Real Estate [Line Items]
Size | ft²		194,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		3,983,000
Development and value-add properties	[5]	$ 23,764,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		12/21
Development completed and transferred to Real estate properties [Member] | Steele Creek X
Real Estate [Line Items]
Size | ft²		162,000
Costs Transferred In Current Year	[1]	$ 0
Development costs incurred, for the period		6,647,000
Development and value-add properties	[5]	$ 10,881,000
Conversion date (or anticipated conversion date, if property is in lease-up or under construction)		12/21

[1] Represents costs transferred from Prospective Development (primarily land) to Under Construction during the period. Negative amounts represent land inventory costs transferred to Under Construction.

[2] Included in these costs are development obligations of $88.7 million and tenant improvement obligations of $10.3 million on properties under development.

[3] Represents value-add properties acquired by EastGroup.

[4] Represents costs transferred from Real estate properties during the year.

[5] Represents cumulative costs at the date of transfer.