Deferred Charges, Goodwill And Other Assets, Net (Schedule Of Deferred Charges, Goodwill And Other Assets) (Details) - USD ($) $ in Thousands		3 Months Ended
		Mar. 31, 2016	Dec. 31, 2015
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deferred leasing costs		$ 237,209	$ 239,690
Deferred financing costs - revolving credit facility	[1]	5,359	5,394
Deferred charges, gross		242,568	245,084
Accumulated amortization		(103,316)	(118,014)
Deferred charges, net		139,252	127,070
Notes receivable	[2]	13,435	13,496
In-place lease values, related intangibles and other assets, net		12,736	10,931
Goodwill		2,945	2,945
Prepaid expenses and other assets, net	[3]	52,629	49,408
Total deferred charges, goodwill and other assets, net		220,997	$ 203,850
Mortgage Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable		$ 10,400
Spread over LIBOR		6.00%
Mortgage loan, maturity date		Aug. 01, 2016
Interest-Free Notes Receivable [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Notes receivable		$ 3,000
Mortgage loan, maturity date		Apr. 01, 2023
Acquisition-related Costs [Member]
Accounts, Notes, Loans and Financing Receivable [Line Items]
Deposits for acquisitions and developments		$ 12,700

[1] Pursuant to recently issued accounting standards, deferred financing costs related to all other debt liabilities (other than for the revolving credit facility) are classified to net against those debt liabilities for all periods presented. See Note 2: Significant Accounting Policies - Deferred Financing Costs.

[2] Includes as of March 31, 2016: a mortgage receivable for $10.4 million which bears interest at LIBOR plus six percent and matures in August 2016; and an interest-free note receivable with a net present value of $3.0 million and matures in April 2023. The Company believes these balances are fully collectible.

[3] Includes as of March 31, 2016, deposits of $12.7 million for acquisitions and developments.