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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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