Organization and Basis of Presentation - Subsequent Events (Details) - Subsequent Event	Aug. 05, 2020
Second Quarter 2020 Period
Subsequent Event [Line Items]
Gross tenant billings collected, percent	91.10%
Second Quarter 2020 Period | Office
Subsequent Event [Line Items]
Gross tenant billings collected, percent	96.00%
Second Quarter 2020 Period | Retail
Subsequent Event [Line Items]
Gross tenant billings collected, percent	70.20%
July 2020 Period
Subsequent Event [Line Items]
Gross tenant billings collected, percent	89.30%
July 2020 Period | Office
Subsequent Event [Line Items]
Gross tenant billings collected, percent	94.20%
July 2020 Period | Retail
Subsequent Event [Line Items]
Gross tenant billings collected, percent	62.70%