Variable Interest Entities (Summary Of Unconsolidated Variable Interest Entities) (Details) $ in Thousands		12 Months Ended
	Jan. 01, 2016 variable_interest_entity	Dec. 31, 2016 USD ($) joint_venture	Dec. 31, 2015 USD ($) joint_venture
Variable Interest Entity [Line Items]
Number of additional VIEs to be reported | variable_interest_entity	10
Unconsolidated Variable Interest Entities [Member]
Variable Interest Entity [Line Items]
Investment in Real Estate Joint Ventures and Partnerships, net		$ 886	$ 10,497
Maximum Risk of Loss (2)		$ 34,000	$ 10,992
Number of additional VIEs to be reported | joint_venture		1	1
Other Liabilities, Net [Member] | Unconsolidated Variable Interest Entities [Member]
Variable Interest Entity [Line Items]
Investment in Real Estate Joint Ventures and Partnerships, net		$ (9,000)