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Real Estate Disposition Activities (Details) ft² in Thousands, $ in Thousands | 3 Months Ended | 6 Months Ended |
--- | --- | --- | ---
Jun. 30, 2020 USD ($) community home residential_condominium ft² | Jun. 30, 2019 USD ($) | Jun. 30, 2020 USD ($) community home residential_condominium ft² | Jun. 30, 2019 USD ($) | Dec. 31, 2019 USD ($)
Summary of income from discontinued operations |  |  |  |  |
Gain on sale of communities | $ 35,295 | $ 20,530 | $ 59,731 | $ 35,365 |
Number Of Communities Held For Sale | community | 0 |  | 0 |  |
Number of Residential Condominium Units Sold | residential_condominium | 16 |  | 52 |  |
Gain (Loss) on Sale of Other Investments |  |  | $ 7,446 | 0 |
Other Selling, General and Administrative Expense | $ 1,196 | $ 945 | 2,639 | $ 1,418 |
For-sale condominium inventory | 311,236 |  | $ 311,236 |  | $ 457,809
Avalon Shelton [Member] |  |  |  |  |
Summary of income from discontinued operations |  |  |  |  |
Number Of Apartment Homes Sold | home |  |  | 250 |  |
Proceeds from Sale of Real Estate |  |  | $ 64,750 |  |
Gain on sale of communities |  |  | $ 24,413 |  |
Avalon Tinton Falls [Member] |  |  |  |  |
Summary of income from discontinued operations |  |  |  |  |
Number Of Apartment Homes Sold | home |  |  | 216 |  |
Proceeds from Sale of Real Estate |  |  | $ 64,900 |  |
Gain on sale of communities |  |  | 35,297 |  |
The Park Loggia [Member] |  |  |  |  |
Summary of income from discontinued operations |  |  |  |  |
Proceeds from Sale of Real Estate | $ 61,207 |  | $ 166,814 |  |
Number Of Residential Condominium Units | home | 172 |  | 172 |  |
Retail Square Feet | ft² | 67 |  | 67 |  |
Gain (Loss) on Sale of Other Investments | $ 2,544 |  | $ 7,447 |  |

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- Definition Total of (1) improvements, (2) held-for-sale, (3) land and land under development, (4) construction-in-process, (5) mortgage loans held-in-inventory, and (6) other real estate investments which are considered inventory due to being held for sale or disposition. + References No definition available. + Details
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