Summary of Significant Accounting Policies and Recent Accounting Pronouncements (Expected Useful Lives Of Depreciable Property) (Details)	12 Months Ended
	Dec. 31, 2018
Intangible assets/liabilities (in-place leases and below market leases)	underlying lease term
Minimum [Member] | Buildings And Improvements [Member]
Estimated Useful Life (in years)	5 years
Minimum [Member] | Furniture, Fixtures, Equipment, And Other [Member]
Estimated Useful Life (in years)	3 years
Maximum [Member] | Buildings And Improvements [Member]
Estimated Useful Life (in years)	35 years
Maximum [Member] | Furniture, Fixtures, Equipment, And Other [Member]
Estimated Useful Life (in years)	20 years