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Segment Reporting - Reconciliation of NOI to Net Income (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2022 | Jun. 30, 2021 | Jun. 30, 2022 | Jun. 30, 2021
Reconciliation of NOI to net income |  |  |  |
Net income | $ 138,566 | $ 447,977 | $ 400,642 | $ 590,211
Property management and other indirect operating expenses, net of corporate income | 30,632 | 24,318 | 58,745 | 48,788
Expensed transaction, development and other pursuit costs, net of recoveries | 2,364 | 1,653 | 3,351 | 1,483
Interest expense, net | 58,797 | 56,104 | 115,323 | 108,717
Gain on extinguishment of debt, net | 0 | 0 | 0 | 122
General and administrative expense | 21,291 | 18,465 | 38,712 | 35,817
Income from investments in unconsolidated entities | (2,480) | (26,559) | (2,797) | (26,092)
Depreciation expense | 199,302 | 184,472 | 401,088 | 367,769
Income tax (benefit) expense | (159) | 10 | 2,312 | (745)
Casualty and impairment loss | 0 | 1,177 | 0 | 1,177
Gain on sale of communities | (404) | (334,569) | (149,204) | (388,296)
Gain on other real estate transactions, net | (43) | (32) | (80) | (459)
Net for-sale condominium activity | 71 | 647 | (165) | 1,560
Net operating income from real estate assets sold or held for sale | (3,650) | (13,893) | (8,916) | (28,472)
Net operating income | $ 444,287 | $ 359,770 | $ 859,011 | $ 711,336
Non-Apartment Components Of Mixed-Use Communities And Other Nonresidential Operations | Operating Income (Loss) | Product Concentration Risk |  |  |  |
Segment Reporting Information [Line Items] |  |  |  |
Concentration risk (as a percent) | 1.70% | 1.60% | 1.90% | 1.50%

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