Organization And Basis Of Presentation (Narrative) (Details)
$ in Millions |
12 Months Ended |
|
|
|
Dec. 31, 2020
USD ($)
ft²
property
item
state
|
Dec. 31, 2019
USD ($)
item
|
Dec. 19, 2019
ft²
|
| Real Estate Properties [Line Items] |
|
|
|
| Percentage of ownership interest |
90.40%
|
90.40%
|
|
| Number of properties owned or investment interests |
52
|
|
|
| Number of units | item |
326
|
208
|
|
| Number of states where properties are located | state |
3
|
|
|
| Consolidated joint ventures, total real estate assets | $ |
$ 486.1
|
$ 497.6
|
|
| Consolidated joint ventures, other assets | $ |
4.5
|
5.5
|
|
| Consolidated joint ventures, mortgages | $ |
284.8
|
283.7
|
|
| Consolidated joint ventures, other liabilities | $ |
21.0
|
$ 18.9
|
|
| Increase in land and other impairments | $ |
$ 2.5
|
|
|
| Commercial Properties [Member] |
|
|
|
| Real Estate Properties [Line Items] |
|
|
|
| Number of tenants | item |
225
|
|
|
| Multi-Family Properties [Member] |
|
|
|
| Real Estate Properties [Line Items] |
|
|
|
| Number of properties owned or investment interests |
19
|
|
|
| Number of units | item |
5,825
|
|
|
| Office [Member] |
|
|
|
| Real Estate Properties [Line Items] |
|
|
|
| Number of properties owned or investment interests |
25
|
|
|
| Aggregate square feet of the property owned or investment interest | ft² |
8,100,000
|
|
|
| Unconsolidated Joint Venture Office Buildings [Member] |
|
|
|
| Real Estate Properties [Line Items] |
|
|
|
| Number of properties owned or investment interests |
2
|
|
|
| Aggregate square feet of the property owned or investment interest | ft² |
200,000
|
|
|
| Area of property (in square feet) | ft² |
200,000
|
|
|
| Unconsolidated Joint Venture Multi-Family Properties [Member] |
|
|
|
| Real Estate Properties [Line Items] |
|
|
|
| Number of properties owned or investment interests |
6
|
|
|
| Number of units | item |
1,786
|
|
|
| Unconsolidated Joint Venture Office/Flex Buildings And Hotel [Member] |
|
|
|
| Real Estate Properties [Line Items] |
|
|
|
| Number of properties owned or investment interests |
3
|
|
|
| Number of units | item |
723
|
|
|
| Parking/Retail [Member] |
|
|
|
| Real Estate Properties [Line Items] |
|
|
|
| Number of properties owned or investment interests |
4
|
|
|
| Aggregate square feet of the property owned or investment interest | ft² |
108,000
|
|
|
| Unconsolidated Joint Venture Parking/Retail Buildings [Member] |
|
|
|
| Real Estate Properties [Line Items] |
|
|
|
| Number of properties owned or investment interests |
1
|
|
|
| Aggregate square feet of the property owned or investment interest | ft² |
51,000
|
|
|
| Land [Member] |
|
|
|
| Real Estate Properties [Line Items] |
|
|
|
| Number of properties owned or investment interests |
1
|
|
|
| Suburban Office Portfolio [Member] |
|
|
|
| Real Estate Properties [Line Items] |
|
|
|
| Area of property (in square feet) | ft² |
|
|
6,600,000
|