Mortgage and Other Indebtedness, Net - Narrative (Details) - USD ($) |
1 Months Ended | 3 Months Ended | 9 Months Ended | 12 Months Ended | |||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
Jul. 01, 2025 |
Jul. 31, 2025 |
May 31, 2025 |
Feb. 28, 2025 |
Jan. 31, 2025 |
Aug. 31, 2024 |
May 31, 2024 |
Feb. 29, 2024 |
Sep. 30, 2025 |
Sep. 30, 2024 |
Sep. 30, 2025 |
Sep. 30, 2024 |
Dec. 31, 2025 |
Dec. 31, 2024 |
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| Debt Instrument [Line Items] | |||||||||||||||||||||
| Non-recourse loan amount | $ 2,180,861,000 | $ 2,180,861,000 | $ 2,212,680,000 | ||||||||||||||||||
| Fair value net liability | 0 | 0 | |||||||||||||||||||
| Payments to acquire real estate | $ 83,100,000 | $ 185,988,000 | |||||||||||||||||||
| Loan, collaterals | 9 associated outparcels | ||||||||||||||||||||
| Loss on extinguishment of debt | $ (819,000) | $ (819,000) | $ (217,000) | $ (819,000) | |||||||||||||||||
| Non-recourse open-air centers and outparcels loan | 761,084,000 | 761,084,000 | 928,106,000 | ||||||||||||||||||
| Long-Term Debt, Maturity, Remainder of Fiscal Year | [1] | 683,121,000 | 683,121,000 | ||||||||||||||||||
| Interest Rate Swap | |||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||
| Cash collateral | 1,920,000 | 1,920,000 | |||||||||||||||||||
| Principal Balances of The Outlet Shoppes at Gettysburg and the Secured Term Loan | |||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||
| Long-Term Debt, Maturity, Remainder of Fiscal Year | 673,942,000 | 673,942,000 | |||||||||||||||||||
| Scenario Forecast | |||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||
| Gain recognized in other comprehensive income (loss) | $ 88,000 | ||||||||||||||||||||
| Fayette Mall | |||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||
| Option extension term of debt instrument | 1 year | 1 year | |||||||||||||||||||
| Cross Creek Mall | |||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||
| Non-recourse loan amount | $ 78,000,000 | ||||||||||||||||||||
| Loan, fixed interest rate | 6.856% | ||||||||||||||||||||
| Debt instrument, term | 5 years | ||||||||||||||||||||
| 2032 Non-Recourse Bank Loan | |||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||
| Non-recourse loan amount | $ 332,956,000 | $ 1,769,615,000 | $ 1,769,615,000 | ||||||||||||||||||
| Loan, fixed interest rate | 7.70% | 7.70% | 7.70% | ||||||||||||||||||
| Principal balance | $ 368,000,000 | ||||||||||||||||||||
| Loan, basis spread rate | 410.00% | ||||||||||||||||||||
| Remaining balance | $ 75,000,000 | ||||||||||||||||||||
| Principal balance increased | 110,000,000 | ||||||||||||||||||||
| Non-recourse open-air centers and outparcels loan | $ 442,956,000 | $ 75,000,000 | [2] | $ 75,000,000 | [2] | $ 170,031,000 | [2] | ||||||||||||||
| 2032 Non-Recourse Bank Loan | Interest Rate Swap | |||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||
| Loan, fixed interest rate | 7.3975% | 7.3975% | |||||||||||||||||||
| Brookfield Square Anchor Redevelopment loan | U.S Treasury Securities | |||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||
| Loan amount paid | $ 15,190,000 | ||||||||||||||||||||
| Open-Air Centers and Outparcels Loan | |||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||
| Payments to acquire real estate | $ 7,107,000 | $ 7,107,000 | |||||||||||||||||||
| Secured Term Loan | |||||||||||||||||||||
| Debt Instrument [Line Items] | |||||||||||||||||||||
| Payments to acquire real estate | $ 41,116,000 | ||||||||||||||||||||
| Loan amount paid | $ 41,116,000 | 46,000,000 | |||||||||||||||||||
| Loan amount | $ 18,297,000 | ||||||||||||||||||||
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