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Dispositions of Real Estate and Discontinued Operations - Schedule of Results of Discontinued Operations (Details) - Held-for-sale - USD ($) $ in Thousands | 3 Months Ended
--- | ---
Mar. 31, 2021 | Mar. 31, 2020
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |
Rental and related revenues | $ 5,228 | $ 32,371
Resident fees and services | 72,998 | 171,726
Total revenues | 78,226 | 204,097
Interest expense | 2,676 | 2,685
Depreciation and amortization | 0 | 64,164
Operating | 71,519 | 138,637
Transaction costs | 76 | 285
Impairments and loan loss reserves (recoveries), net | 0 | 28,016
Total costs and expenses | 74,271 | 233,787
Gain (loss) on sales of real estate, net | 259,662 | 162,800
Other income (expense), net | 5,885 |
Other income (expense), net |  | (45)
Total other income (expense), net | 265,547 | 162,755
Income (loss) before income taxes and equity income (loss) from unconsolidated joint ventures | 269,502 | 133,065
Income tax benefit (expense) | 821 | 3,176
Equity income (loss) from unconsolidated joint ventures | (315) | (833)
Income (loss) from discontinued operations | $ 270,008 | $ 135,408

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