Investments In Unconsolidated Real Estate Entities (Schedule Of Investments In Real Estate Entities And Equity In Earnings Of Real Estate Entities) (Details) - USD ($) $ in Thousands	12 Months Ended
Dec. 31, 2019	Dec. 31, 2018	Dec. 31, 2017
Schedule of Equity Method Investments [Line Items]
Investments in Unconsolidated Real Estate Entities	$ 767,816	$ 783,988
Equity in Earnings of Unconsolidated Real Estate Entities	69,547	103,495	$ 75,655
Other Investments [Member]
Schedule of Equity Method Investments [Line Items]
Equity in Earnings of Unconsolidated Real Estate Entities			3,163
PSB [Member]
Schedule of Equity Method Investments [Line Items]
Investments in Unconsolidated Real Estate Entities	427,875	434,533
Equity in Earnings of Unconsolidated Real Estate Entities	54,090	89,362	46,544
Shurgard [Member]
Schedule of Equity Method Investments [Line Items]
Investments in Unconsolidated Real Estate Entities	339,941	349,455
Equity in Earnings of Unconsolidated Real Estate Entities	$ 15,457	$ 14,133	$ 25,948

Amount of income (loss) for proportionate share of equity method investee's income (loss).

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