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Significant Accounting Policies - Revenue Recognition (Narrative) (Details) - USD ($) $ in Thousands | 6 Months Ended |  |
--- | --- | --- | ---
Jun. 30, 2024 | Dec. 31, 2023 | Jun. 30, 2023
Deferred Revenue Arrangement By Type Table [Line Items] |  |  |
Days past due for income recognition on debt and preferred equity investments to be suspended | 90 days |  |
Deferred revenue | $ 153,660 | $ 134,053 |
Unused and Unexpired Tickets |  |  |
Deferred Revenue Arrangement By Type Table [Line Items] |  |  |
Deferred revenue | $ 4,300 |  | $ 3,200

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