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Fair Value - Classification Between the Three Levels of the Fair Value Hierarchy (Details) - Recurring basis - USD ($) $ in Thousands | Sep. 30, 2023 | Dec. 31, 2022
--- | --- | ---
Estimate of Fair Value Measurement |  |
Financial Instruments Measured/Discussed at Fair Value |  |
Equity Securities | $ 29,236 | $ 27,027
Notes Receivable, net | 81,150 | 28,860
Total Assets | 134,573 | 56,342
DownREIT units |  | 1,211
Total Liabilities | 6,967,850 | 7,423,876
Unsecured notes | Estimate of Fair Value Measurement |  |
Financial Instruments Measured/Discussed at Fair Value |  |
Indebtedness | 6,313,990 | 6,653,681
Secured Debt, Commercial Paper Program and Variable Rate Unsecured Indebtedness | Estimate of Fair Value Measurement |  |
Financial Instruments Measured/Discussed at Fair Value |  |
Indebtedness | 653,860 | 768,984
Interest Rate Caps | Non-designated Hedges | Estimate of Fair Value Measurement |  |
Financial Instruments Measured/Discussed at Fair Value |  |
Derivative assets | 199 | 455
Interest Rate Swaps | Cash Flow Hedges | Estimate of Fair Value Measurement |  |
Financial Instruments Measured/Discussed at Fair Value |  |
Derivative assets | 23,988 |
Quoted Prices in Active Markets for Identical Assets (Level 1) |  |
Financial Instruments Measured/Discussed at Fair Value |  |
Total Assets | 0 | 0
DownREIT units |  | 1,211
Total Liabilities | 6,313,990 | 6,654,892
Quoted Prices in Active Markets for Identical Assets (Level 1) | Unsecured notes |  |
Financial Instruments Measured/Discussed at Fair Value |  |
Indebtedness | 6,313,990 | 6,653,681
Significant Other Observable Inputs (Level 2) |  |
Financial Instruments Measured/Discussed at Fair Value |  |
Equity Securities | 29,236 | 27,027
Notes Receivable, net | 81,150 | 28,860
Total Assets | 134,573 | 56,342
Total Liabilities | 653,860 | 768,984
Significant Other Observable Inputs (Level 2) | Secured Debt, Commercial Paper Program and Variable Rate Unsecured Indebtedness |  |
Financial Instruments Measured/Discussed at Fair Value |  |
Indebtedness | 653,860 | 768,984
Significant Other Observable Inputs (Level 2) | Interest Rate Caps | Non-designated Hedges |  |
Financial Instruments Measured/Discussed at Fair Value |  |
Derivative assets | 199 | 455
Significant Other Observable Inputs (Level 2) | Interest Rate Swaps | Cash Flow Hedges |  |
Financial Instruments Measured/Discussed at Fair Value |  |
Derivative assets | 23,988 |
Significant Unobservable Inputs (Level 3) |  |
Financial Instruments Measured/Discussed at Fair Value |  |
Total Assets | 0 | 0
Total Liabilities | $ 0 | $ 0

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- Definition Units of limited partnership interest in DownREITs which provide the DownREITs limited partners the ability to present all or some of their units for redemption for cash in the amount equal to the fair value of the company's common stock on or about the date of redemption. In lieu of cash redemption, the company may elect to exchange such units for an equal number of shares in the company's common stock. + References No definition available. + Details
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- Definition Fair value, after the effects of master netting arrangements, of a financial asset or other contract with one or more underlyings, notional amount or payment provision or both, and the contract can be net settled by means outside the contract or delivery of an asset. 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