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Real Estate Disposition Activities (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2017 USD ($) community land_parcel | Jun. 30, 2016 USD ($) | Jun. 30, 2017 USD ($) community land_parcel home | Jun. 30, 2016 USD ($)
Summary of income from discontinued operations |  |  |  |
Number of land parcels sold | land_parcel |  |  | 2 |
Number of owned communities under construction | community | 23 |  | 23 |
Gain on sale of other real estate | $ 0 | $ 143 | $ 366 | $ 143
Gain on sale of communities | $ 44,067 | $ 30,990 | $ 132,016 | $ 82,420
Number of land parcels held for sale | land_parcel | 1 |  | 1 |
Avalon Pines |  |  |  |
Summary of income from discontinued operations |  |  |  |
Proceeds from sale of real estate |  |  | $ 140,000 |
Number of apartment homes sold | home |  |  | 450 |
Gain on sale of communities |  |  | $ 87,949 |
Other Real Estate Sales |  |  |  |
Summary of income from discontinued operations |  |  |  |
Proceeds from sale of real estate |  |  | 22,286 |
Gain on sale of other real estate |  |  | 366 |
AVA University District |  |  |  |
Summary of income from discontinued operations |  |  |  |
Proceeds from sale of real estate |  |  | $ 112,500 |
Number of apartment homes sold | home |  |  | 283 |
Gain on sale of communities |  |  | $ 42,596 |
Development Communities | Avalon Newcastle Commons I |  |  |  |
Summary of income from discontinued operations |  |  |  |
Number of owned communities under construction | community | 1 |  | 1 |

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- Definition Amount of gain (loss) on sale or disposal of other assets. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -URI http://asc.fasb.org/extlink&oid=98514028&loc=d3e3602-108585 + Details
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