Deferred Charges, Goodwill And Other Assets, Net (Schedule Of Deferred Charges, Goodwill And Other Assets) (Details) - USD ($)
$ in Thousands
 3 Months Ended
Mar. 31, 2017
Mar. 31, 2016
Dec. 31, 2016
Deferred Charges, Goodwill And Other Assets [Line Items]      
Deferred leasing costs $ 208,353   $ 220,947
Deferred financing costs - unsecured revolving credit facility [1] 4,945   5,400
Deferred charges, gross 213,298   226,347
Accumulated amortization (94,616)   (107,359)
Deferred charges, net 118,682   118,988
Notes receivable [2] 5,019   13,251
In-place lease values, related intangibles and other assets, net 121,899   72,046
Goodwill [3] 2,945   2,945
Prepaid expenses and other assets, net 59,883   60,720
Total deferred charges, goodwill and other assets, net 308,428   $ 267,950
Lease revenue 121,255 $ 126,387  
Interest-Free Notes Receivable [Member]      
Deferred Charges, Goodwill And Other Assets [Line Items]      
Notes receivable $ 2,800    
Mortgage loan, maturity date Apr. 01, 2023    
[1] Pursuant to recently issued accounting standards, deferred financing costs related to all other debt liabilities (other than for the unsecured revolving credit facility) are netted against those debt liabilities for all periods presented. See Note 2: Significant Accounting Policies - Deferred Financing Costs.
[2] Includes as of March 31, 2017, an interest-free note receivable with a net present value of $2.8 million which matures in April 2023. The Company believes this balance is fully collectible.
[3] All goodwill is attributable to the Company's Multi-family Services segment.