Schedule III - Real Estate and Accumulated Depreciation (Changes in Real Estate and Accumulated Depreciation) (Details) - USD ($)		12 Months Ended
		Dec. 31, 2022		Dec. 31, 2021	Dec. 31, 2020
Real estate balance, beginning of the year		$ 369,827,000		$ 604,265,000	$ 1,515,206,000
Properties transferred to/from held for sale		(11,495,000)		(180,123,000)	(945,725,000)
Outparcel dispositions				(387,000)	(840,000)
Property impairments		(16,629,000)		(83,224,000)
Improvements and betterments		22,407,000		29,296,000	35,624,000
Real estate balance, end of the year		364,110,000	[1]	369,827,000	604,265,000
Accumulated depreciation balance, beginning of the year		155,250,000		197,119,000	389,861,000
Properties transferred to/from held for sale		(15,339,000)		(78,207,000)	(235,397,000)
Outparcel dispositions					(90,000)
Depreciation expense	[2]	17,557,000		36,338,000	42,745,000
Accumulated depreciation balance end of the year		157,468,000		155,250,000	197,119,000
Net book value		206,642,000		$ 214,577,000	$ 407,146,000
Difference between recorded cost of real estate and cost for federal tax purposes		$ 49,600,000
Minimum [Member]
Estimated useful life of buildings and improvements		3 years
Maximum [Member]
Estimated useful life of buildings and improvements		40 years

[1] At December 31, 2022, the aggregate cost for federal income tax purposes was approximately $49.6 million greater than the Company's recorded values.

[2] Depreciation is provided over the estimated useful lives of the buildings and improvements, which range from 3 to 40 years.