Organization And Basis Of Presentation (Details)
$ in Millions |
6 Months Ended |
|
|
Jun. 30, 2018
USD ($)
ft²
state
property
item
|
Dec. 31, 2017
USD ($)
|
| Real Estate Properties [Line Items] |
|
|
| Percentage of ownership interest |
89.80%
|
89.60%
|
| Number of properties owned or investment interests |
141
|
|
| Aggregate square feet of the property owned or investment interest | ft² |
16,000,000
|
|
| Number of units | item |
858
|
|
| Number of states where properties are located | state |
6
|
|
| Consolidated joint ventures, total real estate assets | $ |
$ 242.7
|
$ 215.5
|
| Consolidated joint ventures, mortgages | $ |
103.2
|
81.2
|
| Consolidated joint ventures, other liabilities | $ |
$ 22.5
|
$ 19.3
|
| Commercial Properties [Member] |
|
|
| Real Estate Properties [Line Items] |
|
|
| Number of tenants | item |
750
|
|
| Multi-Family Properties [Member] |
|
|
| Real Estate Properties [Line Items] |
|
|
| Number of properties owned or investment interests |
21
|
|
| Number of units | item |
6,082
|
|
| Office And Office/Flex Buildings [Member] |
|
|
| Real Estate Properties [Line Items] |
|
|
| Number of properties owned or investment interests |
47
|
|
| Office [Member] |
|
|
| Real Estate Properties [Line Items] |
|
|
| Number of properties owned or investment interests |
59
|
|
| Aggregate square feet of the property owned or investment interest | ft² |
12,800,000
|
|
| Office Flex Buildings [Member] |
|
|
| Real Estate Properties [Line Items] |
|
|
| Aggregate square feet of the property owned or investment interest | ft² |
2,700,000
|
|
| Flex Properties [Member] |
|
|
| Real Estate Properties [Line Items] |
|
|
| Number of properties owned or investment interests |
61
|
|
| Unconsolidated Joint Venture Office Buildings [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 |
500,000
|
|
| Industrial/Warehouse Facilities [Member] |
|
|
| Real Estate Properties [Line Items] |
|
|
| Number of properties owned or investment interests |
6
|
|
| Aggregate square feet of the property owned or investment interest | ft² |
387,400
|
|
| Unconsolidated Joint Venture Multi-Family Properties [Member] |
|
|
| Real Estate Properties [Line Items] |
|
|
| Number of properties owned or investment interests |
9
|
|
| Number of units | item |
3,334
|
|
| Unconsolidated Joint Venture Office/Flex Buildings And Hotel [Member] |
|
|
| Real Estate Properties [Line Items] |
|
|
| Number of properties owned or investment interests |
1
|
|
| Parking/Retail [Member] |
|
|
| Real Estate Properties [Line Items] |
|
|
| Number of properties owned or investment interests |
6
|
|
| Aggregate square feet of the property owned or investment interest | ft² |
137,000
|
|
| Unconsolidated Joint Venture Parking/Retail 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 |
81,700
|
|
| Land [Member] |
|
|
| Real Estate Properties [Line Items] |
|
|
| Number of properties owned or investment interests |
1
|
|