Summary Of Significant Accounting Policies (Schedule Of Restricted Deposits And Mortgage Escrows) (Details) (USD $)	12 Months Ended
	Dec. 31, 2012		Dec. 31, 2011
Restricted Cash and Cash Equivalents Items [Line Items]
Restricted cash	$ 36,944,000	[1]	$ 3,169,000	[1]
Mortgage escrows	7,152,000		7,975,000
Total	44,096,000		11,144,000
Qualfied escrow for like-kind exchange	$ (30,700,000)

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