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MORTGAGE AND OTHER INDEBTEDNESS - Unsecured Revolving Credit Facility Narrative (Details)
 1 Months Ended 9 Months Ended 12 Months Ended
Jul. 31, 2025
Oct. 31, 2024
USD ($)
extension
Sep. 30, 2025
USD ($)
extension
Dec. 31, 2024
USD ($)
Debt Instrument [Line Items]        
Gross debt     $ 2,944,262,000 $ 3,228,185,000
Letters of credit outstanding     4,200,000  
Letters of credit outstanding, amount advanced     0  
Unsecured term loans        
Debt Instrument [Line Items]        
Gross debt     550,000,000 700,000,000
$300M unsecured term loan | Unsecured term loans        
Debt Instrument [Line Items]        
Principal amount of debt issued     300,000,000  
Gross debt     $ 300,000,000 $ 300,000,000
Variable interest rate, type [Extensible enumeration]     Secured Overnight Financing Rate (SOFR) [Member] Secured Overnight Financing Rate (SOFR) [Member]
Kite Realty Group, L.P. | $300M unsecured term loan | Unsecured term loans        
Debt Instrument [Line Items]        
Debt instrument term (in years)   7 years    
Principal amount of debt issued   $ 300,000,000    
Gross debt   300,000,000 $ 300,000,000 $ 300,000,000
Credit spread, increase (as a percent) 0.10%      
Variable interest rate, type [Extensible enumeration] Secured Overnight Financing Rate (SOFR) [Member]   Secured Overnight Financing Rate (SOFR) [Member]  
Unsecured revolving line of credit        
Debt Instrument [Line Items]        
Gross debt     $ 0 $ 0
Unsecured revolving line of credit | Debt Instrument, Maturity Option, One        
Debt Instrument [Line Items]        
Number of extension options | extension     1  
Extension period (in years)     1 year  
Unsecured revolving line of credit | Debt Instrument, Maturity Option, Two        
Debt Instrument [Line Items]        
Number of extension options | extension     2  
Extension period (in years)     6 months  
Unsecured revolving line of credit | Kite Realty Group, L.P.        
Debt Instrument [Line Items]        
Line of credit, aggregate borrowing capacity   1,100,000,000 $ 1,100,000,000  
Line of credit, accordion feature, maximum borrowing capacity   $ 2,000,000,000    
Credit spread, increase (as a percent) 0.10%      
Variable interest rate, type [Extensible enumeration] Secured Overnight Financing Rate (SOFR) [Member]      
Covenant, total leverage ratio, minimum (as a percent)     0.350  
Covenant, total leverage ratio, maximum (as a percent)     0.375  
Reduction of interest rate margin upon achievement of sustainability metric     0.0002  
Unsecured revolving line of credit | Kite Realty Group, L.P. | Debt Instrument, Maturity Option, One        
Debt Instrument [Line Items]        
Number of extension options | extension   1 1  
Extension period (in years)   1 year 1 year  
Unsecured revolving line of credit | Kite Realty Group, L.P. | Debt Instrument, Maturity Option, Two        
Debt Instrument [Line Items]        
Number of extension options | extension   2 2  
Extension period (in years)   6 months 6 months