Mortgages, Loans Payable And Other Obligations (Narrative) (Details)
|
12 Months Ended |
|
Dec. 31, 2017
USD ($)
property
item
|
Dec. 31, 2016
USD ($)
|
Dec. 31, 2015
USD ($)
|
| Debt Instrument [Line Items] |
|
|
|
| Cash paid for interest |
$ 103,559,000
|
$ 122,414,000
|
$ 115,123,000
|
| Interest capitalized |
20,240,000
|
19,316,000
|
16,217,000
|
| Total indebtedness |
2,809,568,000
|
|
|
| Adjusted total indebtedness |
$ 2,826,110,000
|
$ 2,357,055,000
|
|
| Total indebtedness, weighted average interest rate |
3.93%
|
3.79%
|
|
| Projects Under Development And Developable Land [Member] |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Number of projects with encumbered company mortgages | item |
5
|
|
|
| Carrying value of encumbered properties |
$ 435,000,000
|
|
|
| Other Property [Member] |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Number of properties with encumbered company mortgages | property |
15
|
|
|
| Carrying value of encumbered properties |
$ 1,600,000,000
|
|
|
| Unconsolidated Joint Venture [Member] |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Interest capitalized |
1,056,000
|
$ 5,055,000
|
$ 5,325,000
|
| Revolving Credit Facility Borrowing And Other Variable Rate Mortgage Debt [Member] |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Total indebtedness |
$ 382,443,000
|
$ 481,282,000
|
|
| Total indebtedness, weighted average interest rate |
3.63%
|
2.93%
|
|
| Fixed Rate Debt And Other Obligations [Member] |
|
|
|
| Debt Instrument [Line Items] |
|
|
|
| Total indebtedness |
$ 2,443,667,000
|
$ 1,875,773,000
|
|
| Total indebtedness, weighted average interest rate |
3.98%
|
4.01%
|
|