Commitments and Contingencies - Summary of Shipbuilding Contracts for Ships (Details) - Expedition Ships |
6 Months Ended |
|---|---|
Jun. 30, 2026 | |
| Expedition Ship III | |
| Disclosure of commitments and contingencies [line items] | |
| Expected Delivery | 2030 |
| Expedition Ship IV | |
| Disclosure of commitments and contingencies [line items] | |
| Expected Delivery | 2031 |