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Summary of Significant Accounting Policies - Fair Value (Details) - USD ($) $ in Thousands | Mar. 31, 2024 | Dec. 31, 2023 | Mar. 31, 2023 | Dec. 31, 2022
--- | --- | --- | --- | ---
Assets |  |  |  |  |  |  |
Net investment in sales-type leases |  | $ 3,341,658 |  | $ 3,255,195 |  |  |
Ground Lease receivables |  | 1,661,063 | [1] | 1,622,298 | [1] | $ 1,431,478 | $ 1,374,716
Loan receivable, net | [1] | 112,179 |  | 112,111 |  |  |
Cash and cash equivalents |  | 11,284 | [1] | 18,761 | [1] | 20,335 |
Restricted cash |  | 27,891 | [1] | 27,979 | [1] | $ 27,954 |
Liabilities |  |  |  |  |  |  |
Debt obligations, net | [1] | 4,142,878 |  | 4,054,365 |  |  |
Carrying Value |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Net investment in sales-type leases |  | 3,342,000 |  | 3,255,000 |  |  |
Ground Lease receivables |  | 1,661,000 |  | 1,622,000 |  |  |
Loan receivable, net |  | 112,000 |  | 112,000 |  |  |
Cash and cash equivalents |  | 11,000 |  | 19,000 |  |  |
Restricted cash |  | 28,000 |  | 28,000 |  |  |
Liabilities |  |  |  |  |  |  |
Debt obligations, net |  | 4,143,000 |  | 4,054,000 |  |  |
Carrying Value | Fair Value, Inputs, Level 1 |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt obligations, net |  | 1,034,000 |  | 739,000 |  |  |
Carrying Value | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt obligations, net |  | 3,109,000 |  | 3,315,000 |  |  |
Fair Value |  |  |  |  |  |  |
Liabilities |  |  |  |  |  |  |
Debt obligations, net |  | 3,493,000 |  | 3,491,000 |  |  |
Fair Value | Fair Value, Inputs, Level 1 |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Cash and cash equivalents |  | 11,000 |  | 19,000 |  |  |
Restricted cash |  | 28,000 |  | 28,000 |  |  |
Liabilities |  |  |  |  |  |  |
Debt obligations, net |  | 914,000 |  | 617,000 |  |  |
Fair Value | Fair Value, Inputs, Level 3 |  |  |  |  |  |  |
Assets |  |  |  |  |  |  |
Net investment in sales-type leases |  | 3,683,000 |  | 3,118,000 |  |  |
Ground Lease receivables |  | 1,867,000 |  | 1,603,000 |  |  |
Loan receivable, net |  | 114,000 |  | 114,000 |  |  |
Liabilities |  |  |  |  |  |  |
Debt obligations, net |  | $ 2,579,000 |  | $ 2,874,000 |  |  |
[1] | Refer to Note 2 for details on the Company’s consolidated variable interest entities (“VIEs”).

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