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v3.21.2

Mortgage and Other Indebtedness - Additional Information (Details) |  |  | 1 Months Ended | 3 Months Ended | 9 Months Ended |  |
--- | --- | --- | --- | --- | --- | --- | ---
Mar. 17, 2021 $ / shares | Oct. 25, 2018 USD ($) extension | Mar. 31, 2021 USD ($) day $ / shares | Sep. 30, 2021 USD ($) $ / shares | Mar. 31, 2021 USD ($) | Sep. 30, 2021 USD ($) extension $ / shares | Sep. 30, 2020 USD ($) | Jun. 30, 2021 | Dec. 31, 2020 USD ($)
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Principal |  |  |  | $ 1,298,980,000 |  | $ 1,298,980,000 |  |  | $ 1,176,076,000
Letters of credit outstanding, amount |  |  |  | 1,200,000 |  | 1,200,000 |  |  |
Letters of credit outstanding, amount advanced |  |  |  | 0 |  | 0 |  |  |
Value in unencumbered asset pool |  |  |  | 1,400,000,000 |  | 1,400,000,000 |  |  |
Net proceeds from offering |  |  |  |  |  | 175,000,000 | $ 300,000,000 |  |
Purchase of capped calls |  |  |  |  | $ 9,800,000 |  |  |  |
Percentage bearing fixed interest, amount |  |  |  | 1,000,000,000 |  | 1,000,000,000 |  |  |
Percentage bearing variable interest, amount |  |  |  | 279,200,000 |  | 279,200,000 |  |  |
Three Fixed-Rate Secured Loans |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt, fair value |  |  |  | 1,100,000,000 |  | 1,100,000,000 |  |  |
Variable rate debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Long-term debt, fair value |  |  |  | 279,000,000 |  | 279,000,000 |  |  |
Senior unsecured notes |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Percentage bearing fixed interest, amount |  |  |  | 550,000,000 |  | 550,000,000 |  |  |
Senior unsecured notes | Fixed rate debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Principal |  |  |  | $ 550,000,000 |  | $ 550,000,000 |  |  | 550,000,000
Exchangeable senior notes - fixed rate | Fixed rate debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rate |  |  |  | 0.75% |  | 0.75% |  | 0.75% |
Principal |  |  |  | $ 175,000,000 |  | $ 175,000,000 |  |  |
Principal amount of debt issued |  |  |  | 175,000,000 |  | 175,000,000 |  |  |
Net proceeds from offering |  |  | $ 169,700,000 |  |  |  |  |  |
Interest expense |  |  |  | $ 500,000 |  | $ 1,100,000 |  |  |
Conversion price (in USD per share) | $ / shares |  |  |  | $ 25.21 |  | $ 25.21 |  |  |
Exchange premium, percent of closing price |  |  | 25.00% |  |  |  |  |  |
Percentage of exchange price |  |  |  |  |  | 130.00% |  |  |
Trading days | day |  |  | 20 |  |  |  |  |  |
Consecutive trading days | day |  |  | 30 |  |  |  |  |  |
Percentage of redemption price |  |  | 100.00% |  |  |  |  |  |
Exchangeable conversion ratio |  |  | 0.0396628 |  |  |  |  |  |
Exchangeable senior notes - fixed rate | Capped Call |  |  |  |  |  |  |  |  |
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 |  |  |
Exchangeable senior notes - fixed rate | Common Shares | Fixed rate debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Common stock closing price (in USD per share) | $ / shares | $ 20.17 |  |  |  |  |  |  |  |
Revolving credit facility |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  |  |  | $ 600,000,000 |  | $ 600,000,000 |  |  |
Debt instrument, maturity date, number of extensions | extension |  |  |  |  |  | 1 |  |  |
Debt instrument, maturity date, extension |  |  |  |  |  | 12 months |  |  |
Line of credit facility, option to increase maximum borrowing capacity |  |  |  | 1,200,000,000 |  | $ 1,200,000,000 |  |  |
Principal |  |  |  | 0 |  | 0 |  |  | $ 25,000,000
Line of credit facility, remaining borrowing capacity |  |  |  | $ 416,700,000 |  | $ 416,700,000 |  |  |
LIBOR |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  | 0.13% |  |  |
Minimum | Three Fixed-Rate Secured Loans |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rate |  |  |  | 3.78% |  | 3.78% |  |  |
Percentage bearing fixed interest |  |  |  | 2.78% |  | 2.78% |  |  |
Minimum | Variable rate debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Percentage bearing variable interest |  |  |  | 2.77% |  | 2.77% |  |  |
Maximum | Three Fixed-Rate Secured Loans |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Interest rate |  |  |  | 5.73% |  | 5.73% |  |  |
Percentage bearing fixed interest |  |  |  | 3.87% |  | 3.87% |  |  |
Maximum | Variable rate debt |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Percentage bearing variable interest |  |  |  | 3.52% |  | 3.52% |  |  |
Maximum | LIBOR |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Basis spread on variable rate |  |  |  |  |  | 160.00% |  |  |
KRG, LP |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Net proceeds from offering |  |  |  |  |  | $ 175,000,000 | $ 300,000,000 |  |
Purchase of capped calls |  |  |  |  | $ 9,800,000 |  |  |  |
KRG, LP | Unsecured term loan | Term Loan Due October 2025 |  |  |  |  |  |  |  |  |
Debt Instrument [Line Items] |  |  |  |  |  |  |  |  |
Line of credit facility, maximum borrowing capacity |  | $ 250,000,000 |  |  |  |  |  |  |
Debt instrument, maturity date, number of extensions | extension |  | 3 |  |  |  |  |  |  |
Debt instrument, maturity date, extension |  | 1 year |  |  |  |  |  |  |
Line of credit facility, option to increase maximum borrowing capacity |  | $ 300,000,000 |  |  |  |  |  |  |

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