REAL ESTATE PROPERTIES 3 (Details)		12 Months Ended
		Dec. 31, 2019 USD ($) ft²	Dec. 31, 2018 USD ($)	Dec. 31, 2017 USD ($)
DEVELOPMENT [Abstract]
Interest costs capitalized on development properties		$ 8,453,000	$ 6,334,000	$ 5,765,000
Internal Development Costs Capitalized During Period		6,918,000	4,696,000	4,754,000
Improvements on developments transferred to real estate properties		5,264,000
Development costs incurred, for the period		$ 318,288,000	$ 167,667,000	$ 124,938,000
Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		2,283,000
Development Costs Transferred	[1]	$ 25,144,000
Development costs incurred, for the period		153,990,000
Development and value-add properties		226,345,000
Estimated Total Cumulative Development Costs	[2]	$ 248,700,000
Under construction [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		1,805,000
Development Costs Transferred	[1]	$ 37,021,000
Development costs incurred, for the period		52,428,000
Development and value-add properties		89,449,000
Estimated Total Cumulative Development Costs	[2]	$ 170,800,000
Prospective Development [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		4,415,000
Development Costs Transferred	[1]	$ (68,790,000)
Development costs incurred, for the period		59,191,000
Development and value-add properties		$ 104,205,000
Lease Up, Construction, And Prospective Development [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		8,503,000
Development Costs Transferred	[1]	$ (6,625,000)
Development costs incurred, for the period		265,609,000
Development and value-add properties		419,999,000
Development obligations		59,300,000
Tenant improvement obligations		$ 7,500,000
Development and value-add completed and transferred to Real estate properties [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		1,763,000
Development Costs Transferred	[1]	$ 6,625,000
Development costs incurred, for the period		47,415,000
Development and value-add properties	[3]	$ 156,689,000
Phoenix [Member] | Prospective Development [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		178,000
Development Costs Transferred	[1]	$ (3,221,000)
Development costs incurred, for the period		785,000
Development and value-add properties		$ 4,373,000
Fort Myers [Member] | Prospective Development [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		329,000
Development Costs Transferred	[1]	$ (8,276,000)
Development costs incurred, for the period		2,457,000
Development and value-add properties		$ 7,503,000
Miami [Member] | Prospective Development [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		463,000
Development Costs Transferred	[1]	$ (11,944,000)
Development costs incurred, for the period		9,798,000
Development and value-add properties		$ 34,185,000
Orlando [Member] | Prospective Development [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		0
Development Costs Transferred	[1]	$ (4,967,000)
Development costs incurred, for the period		323,000
Development and value-add properties		$ 1,075,000
Tampa [Member] | Prospective Development [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		349,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		4,241,000
Development and value-add properties		$ 5,801,000
Atlanta [Member] | Prospective Development [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		0
Development Costs Transferred	[1]	$ (3,890,000)
Development costs incurred, for the period		3,164,000
Development and value-add properties		$ 0
Jackson [Member] | Prospective Development [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		28,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		0
Development and value-add properties		$ 706,000
Charlotte [Member] | Prospective Development [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		475,000
Development Costs Transferred	[1]	$ (1,766,000)
Development costs incurred, for the period		1,884,000
Development and value-add properties		$ 7,327,000
Austin [Member] | Prospective Development [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		0
Development Costs Transferred	[1]	$ (4,030,000)
Development costs incurred, for the period		288,000
Development and value-add properties		$ 0
Dallas [Member] | Prospective Development [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		997,000
Development Costs Transferred	[1]	$ (11,583,000)
Development costs incurred, for the period		18,979,000
Development and value-add properties		$ 19,588,000
Houston [Member] | Prospective Development [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		1,223,000
Development Costs Transferred	[1]	$ (13,126,000)
Development costs incurred, for the period		16,135,000
Development and value-add properties		$ 19,448,000
San Antonio [Member] | Prospective Development [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		373,000
Development Costs Transferred	[1]	$ (5,987,000)
Development costs incurred, for the period		1,137,000
Development and value-add properties		$ 4,199,000
Logistics Center 6 & 7 [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²	[4]	142,000
Development Costs Transferred	[1],[4]	$ 0
Development costs incurred, for the period	[4]	15,735,000
Development and value-add properties	[4]	15,735,000
Estimated Total Cumulative Development Costs	[2],[4]	$ 16,400,000
Anticipated date of transfer from development and value-add property to real estate portfolio		01/20
Settlers Crossing 1 [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		77,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		2,999,000
Development and value-add properties		9,259,000
Estimated Total Cumulative Development Costs	[2]	$ 10,200,000
Anticipated date of transfer from development and value-add property to real estate portfolio		01/20
Settlers Crossing 2 [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		83,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		1,360,000
Development and value-add properties		8,475,000
Estimated Total Cumulative Development Costs	[2]	$ 9,200,000
Anticipated date of transfer from development and value-add property to real estate portfolio		01/20
Parc North 5 [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		100,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		1,736,000
Development and value-add properties		8,689,000
Estimated Total Cumulative Development Costs	[2]	$ 9,200,000
Anticipated date of transfer from development and value-add property to real estate portfolio		02/20
Airport Commerce Center 3 [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		96,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		2,763,000
Development and value-add properties		8,556,000
Estimated Total Cumulative Development Costs	[2]	$ 9,100,000
Anticipated date of transfer from development and value-add property to real estate portfolio		03/20
Horizon VIII & IX [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		216,000
Development Costs Transferred	[1]	$ 4,967,000
Development costs incurred, for the period		11,634,000
Development and value-add properties		16,601,000
Estimated Total Cumulative Development Costs	[2]	$ 18,800,000
Anticipated date of transfer from development and value-add property to real estate portfolio		04/20
Ten West Crossing 8 [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		132,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		3,174,000
Development and value-add properties		9,764,000
Estimated Total Cumulative Development Costs	[2]	$ 10,900,000
Anticipated date of transfer from development and value-add property to real estate portfolio		04/20
Tri-County Crossing 1 & 2 [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		203,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		6,491,000
Development and value-add properties		15,386,000
Estimated Total Cumulative Development Costs	[2]	$ 16,700,000
Anticipated date of transfer from development and value-add property to real estate portfolio		04/20
Creekview 121 5 & 6 [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		139,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		7,546,000
Development and value-add properties		13,151,000
Estimated Total Cumulative Development Costs	[2]	$ 16,200,000
Anticipated date of transfer from development and value-add property to real estate portfolio		06/20
Parc North 6 [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		96,000
Development Costs Transferred	[1]	$ 2,552,000
Development costs incurred, for the period		5,738,000
Development and value-add properties		8,290,000
Estimated Total Cumulative Development Costs	[2]	$ 10,100,000
Anticipated date of transfer from development and value-add property to real estate portfolio		07/20
Arlington Tech Centre 1 & 2 [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²	[4]	151,000
Development Costs Transferred	[1],[4]	$ 0
Development costs incurred, for the period	[4]	13,277,000
Development and value-add properties	[4]	13,277,000
Estimated Total Cumulative Development Costs	[2],[4]	$ 15,100,000
Anticipated date of transfer from development and value-add property to real estate portfolio	[4]	08/20
Gateway Commerce Park 5 [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		187,000
Development Costs Transferred	[1]	$ 11,944,000
Development costs incurred, for the period		11,161,000
Development and value-add properties		23,105,000
Estimated Total Cumulative Development Costs	[2]	$ 23,500,000
Anticipated date of transfer from development and value-add property to real estate portfolio		09/20
Grand Oaks 75 2 [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²	[4]	150,000
Development Costs Transferred	[1],[4]	$ 0
Development costs incurred, for the period	[4]	13,115,000
Development and value-add properties	[4]	13,115,000
Estimated Total Cumulative Development Costs	[4]	$ 13,600,000
Anticipated date of transfer from development and value-add property to real estate portfolio	[4]	09/20
Southwest Commerce Center [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²	[4]	196,000
Development Costs Transferred	[1],[4]	$ 0
Development costs incurred, for the period	[4]	26,613,000
Development and value-add properties	[4]	26,613,000
Estimated Total Cumulative Development Costs	[2],[4]	$ 30,100,000
Anticipated date of transfer from development and value-add property to real estate portfolio	[4]	10/20
Suncoast 6 [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		81,000
Development Costs Transferred	[1]	$ 3,915,000
Development costs incurred, for the period		4,019,000
Development and value-add properties		7,934,000
Estimated Total Cumulative Development Costs	[2]	$ 9,200,000
Anticipated date of transfer from development and value-add property to real estate portfolio		10/20
Rocky Point Distribution Center II [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²	[4]	109,000
Development Costs Transferred	[1],[4]	$ 0
Development costs incurred, for the period	[4]	19,275,000
Development and value-add properties	[4]	19,275,000
Estimated Total Cumulative Development Costs	[4]	$ 20,600,000
Anticipated date of transfer from development and value-add property to real estate portfolio	[4]	12/20
Steele Creek IX [Member] | Lease Up [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		125,000
Development Costs Transferred	[1]	$ 1,766,000
Development costs incurred, for the period		7,354,000
Development and value-add properties		9,120,000
Estimated Total Cumulative Development Costs	[2]	$ 9,800,000
Anticipated date of transfer from development and value-add property to real estate portfolio		12/20
SunCoast 8 [Member] | Under construction [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		77,000
Development Costs Transferred	[1]	$ 4,361,000
Development costs incurred, for the period		123,000
Development and value-add properties		4,484,000
Estimated Total Cumulative Development Costs	[2]	$ 9,000,000
Anticipated date of transfer from development and value-add property to real estate portfolio		05/20
Gilbert Crossroads A & B [Member] | Under construction [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		140,000
Development Costs Transferred	[1]	$ 3,221,000
Development costs incurred, for the period		10,729,000
Development and value-add properties		13,950,000
Estimated Total Cumulative Development Costs	[2]	$ 16,000,000
Anticipated date of transfer from development and value-add property to real estate portfolio		01/21
Hurricane Shoals 3 [Member] | Under construction [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		101,000
Development Costs Transferred	[1]	$ 3,890,000
Development costs incurred, for the period		2,739,000
Development and value-add properties		6,629,000
Estimated Total Cumulative Development Costs	[2]	$ 8,800,000
Anticipated date of transfer from development and value-add property to real estate portfolio		03/21
Interstate Commons II [Member] | Under construction [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²	[4]	142,000
Development Costs Transferred	[1],[4]	$ 0
Development costs incurred, for the period	[4]	9,882,000
Development and value-add properties	[4]	9,882,000
Estimated Total Cumulative Development Costs	[2],[4]	$ 11,800,000
Anticipated date of transfer from development and value-add property to real estate portfolio	[4]	03/21
Tri-County Crossing 3 & 4 [Member] | Under construction [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		203,000
Development Costs Transferred	[1]	$ 2,334,000
Development costs incurred, for the period		6,364,000
Development and value-add properties		8,698,000
Estimated Total Cumulative Development Costs	[2]	$ 14,700,000
Anticipated date of transfer from development and value-add property to real estate portfolio		05/21
World Houston 44 [Member] | Under construction [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		134,000
Development Costs Transferred	[1]	$ 1,546,000
Development costs incurred, for the period		3,244,000
Development and value-add properties		4,790,000
Estimated Total Cumulative Development Costs	[2]	$ 9,100,000
Anticipated date of transfer from development and value-add property to real estate portfolio		05/21
Ridgeview 1 & 2 [Member] | Under construction [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		226,000
Development Costs Transferred	[1]	$ 2,499,000
Development costs incurred, for the period		4,032,000
Development and value-add properties		6,531,000
Estimated Total Cumulative Development Costs	[2]	$ 18,500,000
Anticipated date of transfer from development and value-add property to real estate portfolio		06/21
CreekView 121 7 & 8 [Member] | Under construction [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		137,000
Development Costs Transferred	[1]	$ 5,489,000
Development costs incurred, for the period		1,310,000
Development and value-add properties		6,799,000
Estimated Total Cumulative Development Costs	[2]	$ 16,300,000
Anticipated date of transfer from development and value-add property to real estate portfolio		07/21
Northwest Crossing 1-3 [Member] | Under construction [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		278,000
Development Costs Transferred	[1]	$ 6,109,000
Development costs incurred, for the period		5,426,000
Development and value-add properties		11,535,000
Estimated Total Cumulative Development Costs	[2]	$ 25,700,000
Anticipated date of transfer from development and value-add property to real estate portfolio		07/21
Settlers Crossing 3 & 4 [Member] | Under construction [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		173,000
Development Costs Transferred	[1]	$ 4,030,000
Development costs incurred, for the period		4,059,000
Development and value-add properties		8,089,000
Estimated Total Cumulative Development Costs	[2]	$ 18,400,000
Anticipated date of transfer from development and value-add property to real estate portfolio		07/21
LakePort 1-3 [Member] | Under construction [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		194,000
Development Costs Transferred	[1]	$ 3,542,000
Development costs incurred, for the period		4,520,000
Development and value-add properties		8,062,000
Estimated Total Cumulative Development Costs	[2]	$ 22,500,000
Anticipated date of transfer from development and value-add property to real estate portfolio		09/21
Siempre Viva Distribution Center I [Member] | Development and value-add completed and transferred to Real estate properties [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²	[4]	115,000
Development Costs Transferred	[1],[4]	$ 0
Development costs incurred, for the period	[4]	0
Development and value-add properties	[3],[4]	$ 14,075,000
Anticipated date of transfer from development and value-add property to real estate portfolio	[4]	01/19
Creekview 121 3 & 4 [Member] | Development and value-add completed and transferred to Real estate properties [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		158,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		1,739,000
Development and value-add properties	[3]	$ 15,539,000
Anticipated date of transfer from development and value-add property to real estate portfolio		03/19
Horizon VI [Member] | Development and value-add completed and transferred to Real estate properties [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		148,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		3,682,000
Development and value-add properties	[3]	$ 11,907,000
Anticipated date of transfer from development and value-add property to real estate portfolio		03/19
Horizon XI [Member] | Development and value-add completed and transferred to Real estate properties [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		135,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		507,000
Development and value-add properties	[3]	$ 9,230,000
Anticipated date of transfer from development and value-add property to real estate portfolio		04/19
Falcon Field [Member] | Development and value-add completed and transferred to Real estate properties [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		97,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		181,000
Development and value-add properties	[3]	$ 8,413,000
Anticipated date of transfer from development and value-add property to real estate portfolio		05/19
Gateway Commerce Park I [Member] | Development and value-add completed and transferred to Real estate properties [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		200,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		3,402,000
Development and value-add properties	[3]	$ 23,643,000
Anticipated date of transfer from development and value-add property to real estate portfolio		05/19
SunCoast 5 [Member] | Development and value-add completed and transferred to Real estate properties [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		81,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		1,335,000
Development and value-add properties	[3]	$ 7,870,000
Anticipated date of transfer from development and value-add property to real estate portfolio		05/19
Steele Creek V [Member] | Development and value-add completed and transferred to Real estate properties [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		54,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		2,223,000
Development and value-add properties	[3]	$ 5,537,000
Anticipated date of transfer from development and value-add property to real estate portfolio		07/19
Broadmoor Commerce Park II [Member] | Development and value-add completed and transferred to Real estate properties [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		111,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		1,478,000
Development and value-add properties	[3]	$ 7,892,000
Anticipated date of transfer from development and value-add property to real estate portfolio		11/19
Eisenhauer Point 9 [Member] | Development and value-add completed and transferred to Real estate properties [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		82,000
Development Costs Transferred	[1]	$ 1,154,000
Development costs incurred, for the period		5,175,000
Development and value-add properties	[3]	$ 6,329,000
Anticipated date of transfer from development and value-add property to real estate portfolio		11/19
World Houston 43 [Member] | Development and value-add completed and transferred to Real estate properties [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		86,000
Development Costs Transferred	[1]	$ 1,041,000
Development costs incurred, for the period		5,381,000
Development and value-add properties	[3]	$ 6,422,000
Anticipated date of transfer from development and value-add property to real estate portfolio		11/19
Eisenhauer Point 7 & 8 [Member] | Development and value-add completed and transferred to Real estate properties [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		336,000
Development Costs Transferred	[1]	$ 0
Development costs incurred, for the period		9,790,000
Development and value-add properties	[3]	$ 22,880,000
Anticipated date of transfer from development and value-add property to real estate portfolio		12/19
World Houston 45 [Member] | Development and value-add completed and transferred to Real estate properties [Member]
DEVELOPMENT [Abstract]
Size (Unaudited) (Square feet) | ft²		160,000
Development Costs Transferred	[1]	$ 4,430,000
Development costs incurred, for the period		12,522,000
Development and value-add properties	[3]	$ 16,952,000
Anticipated date of transfer from development and value-add property to real estate portfolio		12/19

[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 $59.3 million and tenant improvement obligations of $7.5 million on properties under development.

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

[4] Represents value-add projects acquired by EastGroup.