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v3.19.1

Mortgage Notes Payable (Parenthetical) (Details) | 3 Months Ended
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Mar. 31, 2019
World Plaza [Member] |  |
Debt Instrument [Line Items] |  |
Debt instrument, variable interest rate basis | LIBOR |
Weighted average interest rate | 5.38% |
World Plaza [Member] | ABR [Member] |  |
Debt Instrument [Line Items] |  |
Variable interest rate on mortgage (in hundredth) | 0.75% |
World Plaza [Member] | LIBOR [Member] |  |
Debt Instrument [Line Items] |  |
Variable interest rate on mortgage (in hundredth) | 2.75% |
Grand Pacific Center [Member] |  |
Debt Instrument [Line Items] |  |
Debt Instrument, Interest Rate Terms | Interest rate is subject to reset on September 1, 2023. |
Fixed interest rate on mortgage (in hundredth) | 4.02% | [1],[2]
Model Home Properties [Member] | Minimum [Member] |  |
Debt Instrument [Line Items] |  |
Fixed interest rate on mortgage (in hundredth) | 3.70% |
Model Home Properties [Member] | Maximum [Member] |  |
Debt Instrument [Line Items] |  |
Fixed interest rate on mortgage (in hundredth) | 5.75% |
[1] | Interest rate is subject to reset on September 1, 2023.
[2] | Interest rates as of March 31, 2019.

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