Recent Transactions (Other Investments) (Narrative) (Details) $ in Thousands |
9 Months Ended | ||
|---|---|---|---|
|
Apr. 26, 2016
USD ($)
|
Sep. 30, 2016
USD ($)
ft²
item
|
Sep. 30, 2015
USD ($)
|
|
| Real Estate Properties [Line Items] | |||
| Purchase price of property | $ | $ 94,017 | $ 59,700 | |
| Weehawken, New Jersey [Member] | |||
| Real Estate Properties [Line Items] | |||
| Purchase price of property | $ | $ 36,400 | ||
| Port Imperial 4/5 Garage And Retail [Member] | Projects Under Development And Developable Land [Member] | |||
| Real Estate Properties [Line Items] | |||
| Number of units | item | 1,100 | ||
| Area of property (in square feet) | ft² | 290,000 | ||
| Percentage of interest in venture | 52.50% | ||
| Port Imperial South 11 [Member] | |||
| Real Estate Properties [Line Items] | |||
| Number of units | item | 295 | ||