Summary of Significant Accounting Policies - Additional Information (Detail) - USD ($)	12 Months Ended
	Dec. 31, 2023	Dec. 31, 2022	Dec. 31, 2021
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Notes and mortgages receivable	$ 112,008,000	$ 34,313,000
Maturity period of liquid investments	3 months
Restricted cash	$ 1,979,000	2,536,000
Impairments	5,243,000	3,545,000	$ 4,404,000
Aggregate purchase price of properties acquired during the period	248,072,000	137,275,000	194,292,000
Properties [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Impairments	2,300,000	1,100,000	900,000
Estimated Sale Price Method [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Impairments	5,200,000
Estimated fair value	0
Discounted Cash Flow Method [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Impairments	1,600,000
Accumulation of Asset Retirement Cost Method [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Impairments	5,200,000
Estimated fair value	3,600,000
Accounting Standards Update 2016-13 [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Proceeds from construction loans and development financing	57,700,000
Aggregate purchase price of properties acquired during the period	61,500,000
Accounting Standards Update 2016-13 [Member] | Construction Loans and Development Financing [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Notes and mortgages receivable	46,100,000
Accounting Standards Update 2016-13 [Member] | Notes And Mortgages Receivable
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Additional allowance for credit losses	200,000	$ 300,000	$ 300,000
Aggregate purchase price of properties acquired during the period	$ 57,800,000
Buildings and Improvements [Member] | Minimum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Property plant and equipment useful life	16 years
Buildings and Improvements [Member] | Maximum [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Property plant and equipment useful life	25 years
USTs [Member]
Organization Consolidation And Presentation Of Financial Statements [Line Items]
Property plant and equipment useful life	10 years