Summary Of Quarterly Results (Unaudited) (Footnotes) (Details) - USD ($) $ / shares in Units, $ in Thousands	3 Months Ended
	Dec. 31, 2019	Sep. 30, 2019	Jun. 30, 2019	Mar. 31, 2019	Dec. 31, 2018	Sep. 30, 2018	Jun. 30, 2018	Mar. 31, 2018
Quarterly Information [Line Items]
Total real property tax expense								$ 23,797
Net Income (Loss) Per Common Share - Basic (in dollars per share)	$ 2.82	$ 3.22	$ 2.20	$ 3.49	$ 1.95	$ 2.93	$ 3.43	$ (1.90)
Kings Plaza
Quarterly Information [Line Items]
Total real property tax expense								$ 23,797
Net Income (Loss) Per Common Share - Basic (in dollars per share)								$ 4.65