Investment in Unconsolidated Joint Ventures (Summary Of Financial Information For Joint Ventures) (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended		12 Months Ended
	Jun. 30, 2016	Jun. 30, 2015	Jun. 30, 2016	Jun. 30, 2015	Dec. 31, 2015
Equity Method Investments and Joint Ventures [Abstract]
Net Investment in Properties			$ 744,517		$ 758,582
Total Assets	$ 923,379		923,379		935,990
Debt	459,232		459,232		460,023
Total Liabilities	555,202		555,202		558,310
Equity	368,177		368,177		377,679
Our investment in and share of equity in earnings of unconsolidated joint ventures	105,673		105,673		$ 106,107
Revenues			66,765	$ 63,976
Property Operating Expense			(20,332)	(17,718)
Net Operating Income			46,433	46,258
Net Income			18,937	18,360
Investment in and share of net income (loss)	$ 4,132	$ 3,383	$ 8,210	$ 8,001