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Dispositions (Details) ft² in Thousands, $ in Thousands |  |  | 3 Months Ended | 9 Months Ended
--- | --- | --- | --- | ---
Aug. 31, 2018 USD ($) | May 17, 2018 USD ($) ft² | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($) | Sep. 30, 2019 USD ($) | Sep. 30, 2018 USD ($)
Discontinued Operations: |  |  |  |  |  |
Proceeds from sale | $ 142,500 |  |  |  |  |
Loss on sale of assets |  |  | $ (131) | $ 46,516 | $ (15,506) | $ (514)
Promenade at Casa Grande |  |  |  |  |  |
Discontinued Operations: |  |  |  |  |  |
Loss on sale of assets |  | $ (311) |  |  |  |
Promenade at Casa Grande |  |  |  |  |  |
Discontinued Operations: |  |  |  |  |  |
Property area (in square feet) | ft² |  | 761 |  |  |  |
Proceeds from sale |  | $ 26,000 |  |  |  |

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- Definition Amount of gain (loss) from the difference between the sale price or salvage price and the book value of an asset that was sold or retired, and gain (loss) from the write down of assets from their carrying value to fair value. + 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=118932676&loc=d3e3602-108585 + Details
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- Definition The cash inflow associated with the amount received from the sale of a portion of the company's business, for example a segment, division, branch or other business, during the period. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 230 -SubTopic 10 -Section 45 -Paragraph 12 -Subparagraph (b) -URI http://asc.fasb.org/extlink&oid=118932676&loc=d3e3179-108585 + Details
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