Schedule III - Real Estate and Accumulated Depreciation - Reconciliation of Real Estate and Accumulated Depreciation (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023	Dec. 31, 2022
Reconciliation of Real Estate
Beginning Balance	$ 479,948,000	$ 473,653,000	$ 509,620,000
Improvements	10,872,000	6,863,000	6,916,000
Disposal of Assets	(1,094,000)	(568,000)	(42,883,000)
Ending Balance	489,726,000	479,948,000	473,653,000
Reconciliation of Accumulated Depreciation
Beginning Balance	143,457,000	130,311,000	129,895,000
Current Expense	14,306,000	13,586,000	13,462,000
Impairment of Real Estate	0	0
Disposal of Assets	(1,096,000)	(440,000)	(13,046,000)
Ending Balance	$ 156,667,000	$ 143,457,000	$ 130,311,000