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Accounting Policies - Additional Information (Detail) | 3 Months Ended | 9 Months Ended |
--- | --- | --- | ---
Sep. 30, 2024 USD ($) Lease | Sep. 30, 2023 USD ($) | Sep. 30, 2024 USD ($) Property | Sep. 30, 2023 USD ($) | Dec. 31, 2023 USD ($)
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |
Number of leases modified | Lease | 1 |  |  |  |
Impairments | $ 675,000 | $ 986,000 | $ 2,467,000 | $ 3,970,000 |
Notes and mortgages receivable | 39,004,000 |  | 39,004,000 |  | $ 112,008,000
Aggregate purchase price of properties acquired during the period |  |  | $ 204,488,000 | 192,988,000 |
Number of property whose construction is completed | Property |  |  | 11 |  |
Finance receivables | 55,100,000 |  | $ 55,100,000 |  |
Prior modification of direct financing lease net investment | 11,200,000 |  |  |  |
Direct Financing Leases Financing Receivable [Member] |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |
Impairments | 0 | 0 | 0 | 0 |
Properties [Member] |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |
Impairments |  |  | 500,000 | 1,400,000 |
Estimated Sale Price Method [Member] |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |
Impairments |  |  | 900,000 | 0 |
Discounted Cash Flow Method [Member] |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |
Impairments |  |  | 0 | 1,600,000 |
Accumulation of Asset Retirement Cost Method [Member] |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |
Impairments |  |  | 1,600,000 | 2,400,000 |
Accounting Standards Update 2016-13 [Member] |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |
Proceeds from construction loans and development financing |  |  | 9,200,000 |  |
Aggregate purchase price of properties acquired during the period |  |  | 12,100,000 |  |
Accounting Standards Update 2016-13 [Member] | Direct Financing Leases Financing Receivable [Member] |  |  |  |  |
Organization Consolidation And Presentation Of Financial Statements [Line Items] |  |  |  |  |
Additional allowance for credit losses | 0 | $ 0 | 0 | $ 0 |
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 | 13,400,000 |  | $ 13,400,000 |  |
Number of property whose construction is completed | Property |  |  | 11 |  |
Finance receivables | 41,900,000 |  | $ 41,900,000 |  |
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 |  | 200,000 |  | $ 200,000
Aggregate purchase price of properties acquired during the period |  |  | $ 18,600,000 |  |
Number of property whose construction is completed | Property |  |  | 10 |  |
Finance receivables | $ 51,300,000 |  | $ 51,300,000 |  |

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