Real Estate Facilities (Summary Of Real Estate Assets Acquired And Liabilities Assumed) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2021	Dec. 31, 2020	Dec. 31, 2019
Real Estate Facilities [Abstract]
Land	$ 22,591	$ 30,261	$ 88,093
Buildings and improvements	123,711	27,168	44,313
Other assets (above-market in-place rents)		523
Accrued and other liabilities (below-market in-place rents)	(1,457)	(557)	(1,241)
Other assets (in-place lease value)	4,023	2,700	3,777
Total purchase price	148,868	60,095	134,942
Net operating assets acquired and liabilities assumed	(1,166)	(76)	(664)
Total cash paid	$ 147,702	$ 60,019	$ 134,278