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MORTGAGE AND OTHER INDEBTEDNESS - Additional Information (Details)						1 Months Ended	2 Months Ended	12 Months Ended
	Dec. 22, 2021 USD ($)	Oct. 22, 2021 USD ($) extension	Oct. 21, 2021 USD ($)	Mar. 17, 2021 $ / shares	Oct. 25, 2018 USD ($) extension	Mar. 31, 2021 USD ($) day $ / shares	Dec. 31, 2021 USD ($) $ / shares	Dec. 31, 2021 USD ($) extension $ / shares	Dec. 31, 2020 USD ($)	Dec. 31, 2019 USD ($)	Sep. 30, 2021
Debt Instrument [Line Items]
Net proceeds from offering								$ 215,000,000	$ 325,000,000	$ 75,000,000
Purchase of capped calls								9,800,000
Letters of credit outstanding							$ 1,500,000	1,500,000
Letters of credit outstanding, amount advanced							0	0
Gross debt							3,092,225,000	3,092,225,000	1,176,076,000
Interest costs capitalized								1,600,000	1,500,000	1,900,000
Percentage bearing fixed interest, amount							2,300,000,000	2,300,000,000
Percentage bearing variable interest, amount							804,000,000	804,000,000
Real Estate Asset Acquisition
Debt Instrument [Line Items]
Debt assumed in asset acquisition								3,578,000	0	0
Retail Properties of America, Inc.
Debt Instrument [Line Items]
Debt assumed in merger							1,848,476,000	1,848,476,000
Kite Realty Group, L.P.
Debt Instrument [Line Items]
Net proceeds from offering								215,000,000	325,000,000	$ 75,000,000
Purchase of capped calls								$ 9,800,000
Revolving line of credit
Debt Instrument [Line Items]
Number of extensions | extension								2
Extension period								6 months
Gross debt							55,000,000	$ 55,000,000	25,000,000
Revolving line of credit | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Reduction of interest rate margin upon achievement of sustainability metric								0.0001
Revolving line of credit | Kite Realty Group, L.P.
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity		$ 850,000,000	$ 600,000,000				850,000,000	$ 850,000,000
Number of extensions | extension		2						2
Extension period		6 months						6 months
Line of credit facility, option to increase maximum borrowing capacity							$ 1,600,000,000	$ 1,600,000,000
Maximum leverage ratio							0.60	0.60
Maximum leverage ratio with material acquisition							0.65	0.65
Number of leverage ratio extensions | extension								2
Minimum coverage ratio							1.50	1.50
Maximum ratio of indebtedness to asset value							0.45	0.45
Maximum ratio of unsecured debt to the value of a pool of unencumbered properties							0.60	0.60
Maximum ratio with material acquisition, of unsecured debt to the value of a pool of unencumbered properties							0.65	0.65
Number of extensions for ratio of unsecured debt to the value of a pool of unencumbered properties | extension								2
Minimum ratio of net operating income attributable to a pool of unencumbered properties to unsecured debt interest expense							1.75	1.75
Revolving line of credit | Kite Realty Group, L.P. | Minimum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Credit Spread			1.05%
Revolving line of credit | Kite Realty Group, L.P. | Maximum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Credit Spread			1.50%
Unsecured term loans
Debt Instrument [Line Items]
Repayments of debt								$ 2,700,000
Gross debt							$ 720,000,000	720,000,000	250,000,000
Unsecured term loans | Kite Realty Group, L.P. | Retail Properties of America, Inc.
Debt Instrument [Line Items]
Debt assumed in merger		$ 470,000,000
Mortgages payable
Debt Instrument [Line Items]
Gross debt							392,590,000	392,590,000	351,076,000
Mortgages payable | Real Estate Asset Acquisition
Debt Instrument [Line Items]
Debt assumed in asset acquisition	$ 3,600,000
Interest Rate	3.80%
Mortgages payable | Retail Properties of America, Inc.
Debt Instrument [Line Items]
Debt assumed in merger		90,700,000
Repayment of debt assumed							24,100,000
Mortgages payable | Retail Properties of America, Inc. | Fair Value, Nonrecurring
Debt Instrument [Line Items]
Fair market value adjustments to debt assumed		600,000
Senior unsecured notes
Debt Instrument [Line Items]
Gross debt							$ 1,924,635,000	1,924,635,000	550,000,000
Senior Exchangeable Notes
Debt Instrument [Line Items]
Interest Rate											0.75%
Net proceeds from offering						$ 169,700,000
Interest expense								$ 1,600,000
Conversion price (in USD per share) | $ / shares							$ 25.21	$ 25.21
Exchange premium, percent of closing price						25.00%
Senior Exchangeable Notes | Common Shares
Debt Instrument [Line Items]
Common stock closing price (in USD per share) | $ / shares				$ 20.17
Senior Exchangeable Notes | Kite Realty Group, L.P.
Debt Instrument [Line Items]
Interest Rate						0.75%
Redemption price, percentage						100.00%
Principal amount of debt issued						$ 175,000,000
Percentage of exchange price								130.00%
Trading days | day						20
Consecutive trading days | day						30
Private Placement Notes | Senior unsecured notes | Kite Realty Group, L.P.
Debt Instrument [Line Items]
Redemption price, percentage								100.00%
Private Placement Notes | Senior unsecured notes | Kite Realty Group, L.P. | Minimum
Debt Instrument [Line Items]
Minimum percentage of principal amount available to be redeemed								5.00%
Private Placement Notes | Senior unsecured notes | Kite Realty Group, L.P. | Retail Properties of America, Inc.
Debt Instrument [Line Items]
Debt assumed in merger		450,000,000
Public Placement Notes | Senior unsecured notes | Kite Realty Group, L.P.
Debt Instrument [Line Items]
Redemption price, percentage								100.00%
Redemption period, prior to maturity date								3 months
Public Placement Notes | Senior unsecured notes | Kite Realty Group, L.P. | Retail Properties of America, Inc.
Debt Instrument [Line Items]
Debt assumed in merger		$ 750,000,000
Capped Call | Senior Exchangeable Notes | Kite Realty Group, L.P.
Debt Instrument [Line Items]
Exchange premium, percent of closing price						50.00%
Exchange price (in USD per share) | $ / shares						$ 30.26
Purchase of capped calls								$ 9,800,000
Unsecured term loan due 2024 - fixed rate | Unsecured term loans
Debt Instrument [Line Items]
Gross debt							$ 120,000,000	$ 120,000,000	0
Percentage bearing fixed interest							1.68%	1.68%
Unsecured term loan due 2024 - fixed rate | Unsecured term loans | Minimum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Credit Spread								1.20%
Unsecured term loan due 2024 - fixed rate | Unsecured term loans | Maximum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Credit Spread								1.70%
Unsecured term loan due 2024 - fixed rate | Unsecured term loans | Kite Realty Group, L.P.
Debt Instrument [Line Items]
Gross debt							$ 120,000,000	$ 120,000,000
Gross debt, option to increase							250,000,000	250,000,000
Unsecured term loan due 2026 - fixed rate | Unsecured term loans
Debt Instrument [Line Items]
Gross debt							$ 150,000,000	$ 150,000,000	0
Percentage bearing fixed interest							1.77%	1.77%
Unsecured term loan due 2026 - fixed rate | Unsecured term loans | Minimum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Credit Spread								1.20%
Unsecured term loan due 2026 - fixed rate | Unsecured term loans | Maximum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Credit Spread								1.70%
Unsecured term loan due 2026 - fixed rate | Unsecured term loans | Kite Realty Group, L.P.
Debt Instrument [Line Items]
Gross debt							$ 150,000,000	$ 150,000,000
Gross debt, option to increase							250,000,000	$ 250,000,000
Unsecured term loan due 2026 - fixed rate | Unsecured term loans | Kite Realty Group, L.P. | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Reduction of interest rate margin upon achievement of sustainability metric								0.0001
Unsecured term loan due 2023 - fixed rate | Unsecured term loans
Debt Instrument [Line Items]
Gross debt							$ 200,000,000	$ 200,000,000	0
Percentage bearing fixed interest							2.85%	2.85%
Unsecured term loan due 2023 - fixed rate | Unsecured term loans | Minimum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Credit Spread								1.20%
Unsecured term loan due 2023 - fixed rate | Unsecured term loans | Maximum | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Credit Spread								1.85%
Unsecured term loan due 2023 - fixed rate | Unsecured term loans | Kite Realty Group, L.P.
Debt Instrument [Line Items]
Gross debt							$ 200,000,000	$ 200,000,000
Gross debt, option to increase							300,000,000	$ 300,000,000
Term Loan Due October 2025 | Unsecured term loans
Debt Instrument [Line Items]
Number of extensions | extension								3
Extension period								1 year
Gross debt							$ 250,000,000	$ 250,000,000	250,000,000
Percentage bearing fixed interest							5.09%	5.09%
Term Loan Due October 2025 | Unsecured term loans | Kite Realty Group, L.P.
Debt Instrument [Line Items]
Line of credit facility, maximum borrowing capacity					$ 250,000,000
Number of extensions | extension					3
Extension period					1 year
Line of credit facility, option to increase maximum borrowing capacity					$ 300,000,000
Fixed Rate Debt
Debt Instrument [Line Items]
Long-term debt, fair value							$ 2,400,000,000	$ 2,400,000,000
Fixed Rate Debt | Minimum
Debt Instrument [Line Items]
Percentage bearing fixed interest							2.90%	2.90%
Fixed Rate Debt | Maximum
Debt Instrument [Line Items]
Percentage bearing fixed interest							4.40%	4.40%
Fixed Rate Debt | Mortgages payable
Debt Instrument [Line Items]
Gross debt							$ 363,577,000	$ 363,577,000	$ 295,966,000
Fixed Rate Debt | Mortgages payable | Minimum
Debt Instrument [Line Items]
Interest Rate							3.75%	3.75%	3.78%
Fixed Rate Debt | Mortgages payable | Maximum
Debt Instrument [Line Items]
Interest Rate							5.73%	5.73%	5.73%
Fixed Rate Debt | Senior Exchangeable Notes
Debt Instrument [Line Items]
Exchangeable conversion ratio						0.0396628
Variable Rate Debt
Debt Instrument [Line Items]
Long-term debt, fair value							$ 806,400,000	$ 806,400,000
Variable Rate Debt | Minimum
Debt Instrument [Line Items]
Percentage bearing fixed interest							1.20%	1.20%
Variable Rate Debt | Maximum
Debt Instrument [Line Items]
Percentage bearing fixed interest							3.60%	3.60%
Variable Rate Debt | Mortgages payable
Debt Instrument [Line Items]
Repayments of debt								$ 25,400,000
Gross debt							$ 29,013,000	$ 29,013,000	$ 55,110,000
Variable Rate Debt | Mortgages payable | London Interbank Offered Rate (LIBOR)
Debt Instrument [Line Items]
Credit Spread								160.00%

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