Disposed Properties - Narrative (Details) - USD ($) |
12 Months Ended | |||
---|---|---|---|---|
Aug. 30, 2017 |
Dec. 31, 2018 |
Dec. 31, 2017 |
Dec. 31, 2016 |
|
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||||
Proceeds from sale and transfer of investment properties, net | $ 430,514,000 | $ 233,686,000 | $ 1,580,994,000 | |
Gross Disposition Price | $ 466,175,000 | 244,066,000 | 1,924,350,000 | |
Gain on sale of properties, net | $ 10,115,000 | $ 236,256,000 | ||
Discontinued Operations, Disposed of by Sale | Worldgate Plaza | ||||
Income Statement, Balance Sheet and Additional Disclosures by Disposal Groups, Including Discontinued Operations [Line Items] | ||||
Gross Disposition Price | $ 53,500,000 |