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Real Estate Disposition Activities (Details) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2018 USD ($) community | Jun. 30, 2017 USD ($) | Jun. 30, 2018 USD ($) community home | Jun. 30, 2017 USD ($)
Summary of income from discontinued operations |  |  |  |
Gain on sale of communities | $ 105,201 | $ 44,067 | $ 105,201 | $ 132,016
Number of Communities Held for Sale | community | 1 |  | 1 |
Avalon at Blue Hills and Avalon Canton at Blue Hills [Member] |  |  |  |
Summary of income from discontinued operations |  |  |  |
Number of Apartment Homes Sold | home |  |  | 472 |
Proceeds from Sale of Real Estate |  |  | $ 131,250 |
Gain on sale of communities |  |  | $ 57,666 |
Eaves North Quincy [Member] |  |  |  |
Summary of income from discontinued operations |  |  |  |
Number of Apartment Homes Sold | home |  |  | 224 |
Proceeds from Sale of Real Estate |  |  | $ 64,250 |
Gain on sale of communities |  |  | $ 18,055 |
Avalon Anaheim Stadium [Member] |  |  |  |
Summary of income from discontinued operations |  |  |  |
Number of Apartment Homes Sold | home |  |  | 251 |
Proceeds from Sale of Real Estate |  |  | $ 111,600 |
Gain on sale of communities |  |  | $ 29,490 |

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- Definition The net gain (loss) resulting from sales and other disposals of real estate owned for investment purposes. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 28 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=109223946&loc=d3e3602-108585 Reference 2: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(9)(a)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 3: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 220 -SubTopic 10 -Section S99 -Paragraph 2 -Subparagraph (SX 210.5-03(b)(7)(c)) -URI http://asc.fasb.org/extlink&oid=115205541&loc=SL114868664-224227 Reference 4: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 942 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.9-04(14)(d)) -URI http://asc.fasb.org/extlink&oid=114873765&loc=SL114874048-224260 Reference 5: http://www.xbrl.org/2009/role/commonPracticeRef -Publisher FASB -Name Accounting Standards Codification -Topic 944 -SubTopic 220 -Section S99 -Paragraph 1 -Subparagraph (SX 210.7-04(3)(a)) -URI http://asc.fasb.org/extlink&oid=114873790&loc=SL114874131-224263 + Details
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