Schedule III - Real Estate and Accumulated Depreciation - Summary of Changes in Real Estate and Accumulated Depreciation (Details)		12 Months Ended
	Oct. 28, 2022 property	Dec. 31, 2023 USD ($) property	Dec. 31, 2022 USD ($) property
Cost
Real estate balance, beginning of the year		$ 364,110,000	$ 369,827,000
Properties transferred to/from held for sale		0	(11,495,000)
Disposals		(2,401,000)	0
Property impairments		0	(16,629,000)
Improvements and betterments		6,456,000	22,407,000
Real estate balance, end of the year		368,165,000	364,110,000
Accumulated depreciation
Accumulated depreciation balance, beginning of the year		157,468,000	155,250,000
Properties transferred to/from held for sale		0	(15,339,000)
Disposals		(945,000)	0
Depreciation expense		9,966,000	17,557,000
Accumulated depreciation balance end of the year		166,489,000	157,468,000
Real estate, net		$ 201,676,000	$ 206,642,000
Number of collateral real estate properties | property		13	12
Real estate companies, investment in real estate, federal income tax basis, difference		$ 86,300,000
Term loan, 10 properties | Fixed-rate secured term loans
Accumulated depreciation
Number of collateral real estate properties | property	10	10	10
Minimum
Accumulated depreciation
Estimated useful life of buildings and improvements		3 years
Minimum | Buildings and improvements
Accumulated depreciation
Estimated useful life of buildings and improvements		3 years
Maximum
Accumulated depreciation
Estimated useful life of buildings and improvements		40 years
Maximum | Buildings and improvements
Accumulated depreciation
Estimated useful life of buildings and improvements		40 years