Schedule III Real Estate And Accumulated Depreciation (Schedule Of Changes In Rental Properties And Accumulated Depreciation) (Details) - USD ($) $ in Thousands	12 Months Ended
	Dec. 31, 2018	Dec. 31, 2017	Dec. 31, 2016
Real Estate and Accumulated Depreciation [Line Items]
Balance	$ 241,128	$ 143,384	$ 188,899
Additions	38,198	134,709	25,618
Disposals	(22,220)	(34,814)	(68,256)
Impairment loss, net	93	(2,151)	(2,877)
Balance	257,199	241,128	143,384
Balance	21,548	28,513	58,200
Depreciation for the period	9,475	6,898	5,190
Depreciation on assets sold or disposed	(8,094)	(13,863)	(33,477)
Impairment loss, net			(1,400)
Balance	22,929	$ 21,548	$ 28,513
Aggregate cost of land, buildings, furniture and equipment for Federal income tax purposes	$ 256,000
Minimum [Member] | Building And Improvements [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life used for computation of depreciation	15 years
Minimum [Member] | Furniture And Equipment [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life used for computation of depreciation	3 years
Maximum [Member] | Building And Improvements [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life used for computation of depreciation	40 years
Maximum [Member] | Furniture And Equipment [Member]
Real Estate and Accumulated Depreciation [Line Items]
Useful life used for computation of depreciation	12 years