v3.26.3
EQUITY OFFERINGS (Details) - USD ($)
$ / shares in Units, $ in Thousands
 3 Months Ended 9 Months Ended 12 Months Ended
Dec. 05, 2025
Sep. 30, 2026
Jun. 30, 2026
Mar. 31, 2026
Sep. 30, 2025
Jun. 30, 2025
Mar. 31, 2025
Sep. 30, 2026
Dec. 31, 2025
Dec. 31, 2024
Equity Offerings [Line Items]                    
Issuance of shares of common stock       365,620 647,758 416,067 418,373      
Forward Equity Offering Activity [Roll Forward]                    
Forward Sale Agreements Outstanding   3,443,388 [1] 1,040,457 252,136       3,443,388 [1] 0 385,253
Forward Sale Agreements Outstanding, price per share   $ 201.88 [1] $ 201.45 $ 196.16       $ 201.88 [1]   $ 175.07
Forward sale agreements Outstanding, price per share                 —  
Forward Sale Agreements Outstanding, value   $ 695,134 [1] $ 209,603 $ 49,459       $ 695,134 [1] $ 0 $ 67,446
Forward sale agreements settled, shares   0 0 0         (1,449,078) [2]  
Forward sale agreements settled — Weighted average price per share   — — —            
Forward sale agreements settled, gross proceeds   $ 0 $ 0 $ 0         $ (260,944) [2]  
New forward sale agreements, shares [3]   2,402,931 [1] 788,321 [1] 252,136         1,063,825  
New forward sale agreements, price per share [3]   $ 202.06 [1] $ 203.15 [1] $ 196.16         $ 181.89  
New forward sale agreements, value [3]   $ 485,531 [1] $ 160,144 [1] $ 49,459         $ 193,498  
Forward sale agreements settled, price per share [2]                 $ 180.08  
ATM Program - October 2024                    
Equity Offerings [Line Items]                    
At-the-market program, maximum aggregate gross sales price $ 1,000,000                  
Gross Proceeds from Issuance of Common Stock $ 479,899                  
ATM Program - December 2025                    
Equity Offerings [Line Items]                    
At-the-market program, maximum aggregate gross sales price               $ 1,000,000    
Direct common stock issuances                    
Equity Offerings [Line Items]                    
Issuance of shares of common stock [4]   0 0 365,620       365,620 33,120  
Sale of stock, weighted average price per share   $ 0 $ 0 $ 191.46       $ 191.46 $ 183.15  
Gross Proceeds from Issuance of Common Stock   $ 0 $ 0 $ 70,000       $ 70,000 $ 6,066  
Net proceeds from issuance of common stock   $ 0 $ 0 $ 69,300       $ 69,300 $ 6,005  
[1] Available through forward equity sale agreements before the applicable settlement periods expire, which occur between February 2027 and February 2028, net of adjustments described above.
[2] EastGroup settled outstanding forward equity sale agreements by issuing 1,449,078 shares of common stock in exchange for net proceeds of approximately $258,066,000
[3] The Company did not receive any proceeds from the sale of common shares by the forward counterparties at the time it entered into forward sale agreements.
[4] Excludes shares of common stock sold on a forward basis as described below.