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Summary of Significant Accounting Policies - Fair Value (Details) $ in Thousands | Sep. 30, 2024 USD ($) category | Dec. 31, 2023 USD ($) | Sep. 30, 2023 USD ($) | Dec. 31, 2022 USD ($)
--- | --- | --- | --- | ---
Fair Value, Balance Sheet Grouping, Financial Statement Captions [Line Items] |  |  |  |  |  |  |
Number of categories used to analyze Ground Leases | category |  | 2 |  |  |  |  |
Assets |  |  |  |  |  |  |
Net investment in sales-type leases |  | $ 3,440,042 | [1] | $ 3,255,195 | [1] | $ 3,182,592 | $ 3,106,599
Ground Lease receivables |  | 1,779,147 | [1] | 1,622,298 | [1] | 1,563,670 | $ 1,374,716
Loan receivable, net | [1] | 112,345 |  | 112,111 |  |  |
Cash and cash equivalents |  | 15,579 | [1] | 18,761 | [1] | 11,483 |
Restricted cash |  | 8,683 | [1] | 27,979 | [1] | $ 27,978 |
Liabilities |  |  |  |  |  |  |
Debt obligations, net | [1] | 4,295,673 |  | 4,054,365 |  |  |
Carrying Value |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Net investment in sales-type leases |  | 3,440,000 |  | 3,255,000 |  |  |
Ground Lease receivables |  | 1,779,000 |  | 1,622,000 |  |  |
Loan receivable, net |  | 112,000 |  | 112,000 |  |  |
Cash and cash equivalents |  | 16,000 |  | 19,000 |  |  |
Restricted cash |  | 9,000 |  | 28,000 |  |  |
Liabilities |  |  |  |  |  |  |
Debt obligations, net |  | 4,296,000 |  | 4,054,000 |  |  |
Carrying Value | Fair Value, Inputs, Level 1 |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt obligations, net |  | 1,035,000 |  | 739,000 |  |  |
Carrying Value | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt obligations, net |  | 3,261,000 |  | 3,315,000 |  |  |
Fair Value |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt obligations, net |  | 3,768,000 |  | 3,491,000 |  |  |
Fair Value | Fair Value, Inputs, Level 1 |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Cash and cash equivalents |  | 16,000 |  | 19,000 |  |  |
Restricted cash |  | 9,000 |  | 28,000 |  |  |
Liabilities |  |  |  |  |  |  |
Debt obligations, net |  | 972,000 |  | 617,000 |  |  |
Fair Value | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Net investment in sales-type leases |  | 3,818,000 |  | 3,118,000 |  |  |
Ground Lease receivables |  | 2,069,000 |  | 1,603,000 |  |  |
Loan receivable, net |  | 115,000 |  | 114,000 |  |  |
Liabilities |  |  |  |  |  |  |
Debt obligations, net |  | $ 2,796,000 |  | $ 2,874,000 |  |  |
[1] | Refer to Note 2 for details on the Company’s consolidated variable interest entities (“VIEs”).

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