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Investment in and Advances in Real Estate Joint Ventures - Investment and Advances to Real Estate Joint Ventures - Balance Sheets (Details) - USD ($) $ in Thousands | Dec. 31, 2024 | Dec. 31, 2023
--- | --- | ---
Subsidiary or Equity Method Investee [Line Items] |  |  |
Total real estate, net |  | $ 16,810,333 | $ 15,094,925
Other assets, net |  | 578,569 | 241,948
Assets | [1] | 20,309,896 | 18,274,022
Notes payable, net |  | 7,964,738 | 7,262,851
Mortgages payable, net |  | 496,438 | 353,945
Other Liabilities |  | 597,456 | 599,961
Accumulated other comprehensive income |  | 11,038 | 3,329
Noncontrolling interests |  | 145,365 | 127,993
Members’ capital |  | 10,652,547 | 9,525,465
Total Liabilities and Members’ Capital |  | 20,309,896 | 18,274,022
Equity, Attributable to Noncontrolling Interest |  | 145,365 | 127,993
KIR [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Total real estate, net |  | 659,300 | 669,200
Other assets, net |  | 90,800 | 67,500
Assets |  | 750,100 | 736,700
Notes payable, net |  | 273,900 | 273,400
Other Liabilities |  | 14,100 | 15,900
Accumulated other comprehensive income |  | 4,200 | 600
Members’ capital |  | 457,900 | 446,800
Total Liabilities and Members’ Capital |  | 750,100 | 736,700
Excluding KIR [Member] |  |  |
Subsidiary or Equity Method Investee [Line Items] |  |  |
Total real estate, net |  | 4,260,000 | 3,156,200
Other assets, net |  | 231,400 | 251,600
Assets |  | 4,491,400 | 3,407,800
Notes payable, net |  | 309,200 | 159,900
Mortgages payable, net |  | 890,600 | 815,600
Other Liabilities |  | 119,400 | 70,900
Accumulated other comprehensive income |  | 2,400 | 5,100
Noncontrolling interests |  | 0 | 34,400
Members’ capital |  | 3,169,800 | 2,321,900
Total Liabilities and Members’ Capital |  | 4,491,400 | 3,407,800
Equity, Attributable to Noncontrolling Interest |  | $ 0 | $ 34,400
[1] | Includes restricted assets of consolidated variable interest entities (“VIEs”) at December 31, 2024 and 2023 of $334,859 and $388,626, respectively. See Footnote 17 of the Notes to Consolidated Financial Statements.

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