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Dispositions of Real Estate and Discontinued Operations - Schedule of Results of Discontinued Operations (Details) - USD ($) $ in Thousands | 12 Months Ended
--- | ---
Dec. 31, 2020 | Dec. 31, 2019 | Dec. 31, 2018
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Income tax benefit (expense) | $ 10,000 | $ 12,000 | $ 13,000
Held-for-sale |  |  |
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] |  |  |
Rental and related revenues | 97,877 | 152,576 | 216,887
Resident fees and services | 621,253 | 583,653 | 400,557
Income from direct financing leases | 0 | 20,815 | 37,926
Total revenues | 719,130 | 757,044 | 655,370
Interest expense | 10,538 | 8,007 | 5,062
Depreciation and amortization | 143,194 | 224,798 | 144,819
Operating | 550,226 | 474,126 | 326,381
Transaction costs | 20,426 | 6,780 | 9,635
Impairments and loan loss reserves (recoveries), net | 201,344 | 208,229 | 44,343
Total costs and expenses | 925,728 | 921,940 | 530,240
Gain (loss) on sales of real estate, net | 460,144 | 22,940 | 94,618
Other income (expense), net |  |  | (110)
Other income (expense), net | 5,475 | 17,060 |
Total other income (expense), net | 465,619 | 40,000 | 94,508
Income (loss) before income taxes and equity income (loss) from unconsolidated joint ventures | 259,021 | (124,896) | 219,638
Income tax benefit (expense) | 9,913 | 11,783 | 13,459
Equity income (loss) from unconsolidated joint ventures | (1,188) | (2,295) | 3,159
Income (loss) from discontinued operations | $ 267,746 | $ (115,408) | $ 236,256

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