Summary Of Significant Accounting Policies (Schedule Of Restricted Deposits And Mortgage Escrows) (Details) (USD $)	9 Months Ended
	Sep. 30, 2013		Dec. 31, 2012
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 52,567,000	[1]	$ 36,944,000	[1]
Mortgage escrows	4,901,000		7,152,000
Total	57,468,000		44,096,000
Qualified escrow for like-kind exchange, proceeds	50,300,000
Qualified escrow for like-kind exchange, payments	$ 30,700,000

[1] The increase between the periods presented is primarily attributable to $50.3 million placed in a qualified escrow account, less the use of $30.7 million for the purpose of completing like-kind exchange transactions.