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Net Investment in Sales-type Leases, Ground Lease Receivables and Loans Receivable, net - Related Party (Interest Income) (Details) - USD ($) $ in Thousands | 3 Months Ended | 6 Months Ended
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Jun. 30, 2023 | Jun. 30, 2022
Lessor, Lease, Description [Line Items] |  |  |  |  |
Interest income from sales-type leases | [1] | $ 58,158 | $ 48,247 | $ 115,220 | $ 91,278
Cash |  |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |  |
Interest income from sales-type leases |  | 37,454 | 30,436 | 74,140 | 57,619
Non-cash |  |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |  |
Interest income from sales-type leases |  | 20,704 | 17,811 | 41,080 | 33,659
Net Investment in Sales-type Leases |  |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |  |
Interest income from sales-type leases |  | 39,521 | 34,914 | 78,625 | 66,445
Net Investment in Sales-type Leases | Cash |  |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |  |
Interest income from sales-type leases |  | 25,168 | 21,935 | 50,050 | 41,761
Net Investment in Sales-type Leases | Non-cash |  |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |  |
Interest income from sales-type leases |  | 14,353 | 12,979 | 28,575 | 24,684
Ground Lease Receivables |  |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |  |
Interest income from sales-type leases |  | 18,637 | 13,333 | 36,595 | 24,833
Ground Lease Receivables | Cash |  |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |  |
Interest income from sales-type leases |  | 12,286 | 8,501 | 24,090 | 15,858
Ground Lease Receivables | Non-cash |  |  |  |  |
Lessor, Lease, Description [Line Items] |  |  |  |  |
Interest income from sales-type leases |  | $ 6,351 | $ 4,832 | $ 12,505 | $ 8,975
[1] | For the six months ended June 30, 2022, the Company recorded $2.1 million of “Interest income from sales-type leases” in its consolidated statements of operations from Ground Leases with iStar Inc. (“iStar”).

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