Leases - Additional Information (Details) - USD ($) $ in Thousands |
3 Months Ended | 6 Months Ended | 12 Months Ended | |||
|---|---|---|---|---|---|---|
Jun. 30, 2026 |
Jun. 30, 2025 |
Jun. 30, 2026 |
Jun. 30, 2025 |
Dec. 31, 2025 |
Dec. 31, 2024 |
|
| Lessee, Lease, Description [Line Items] | ||||||
| Operating lease cost | $ 2,700 | $ 2,700 | $ 5,500 | $ 5,500 | ||
| Operating Lease, Right-of-Use Asset | 45,834 | 45,834 | $ 48,739 | |||
| Operating Lease, Liability | $ 47,187 | $ 47,187 | 50,392 | |||
| HMH Holding BV And Subsidiaries [Member] | ||||||
| Lessee, Lease, Description [Line Items] | ||||||
| Operating lease cost | 11,261 | $ 9,708 | ||||
| Operating Lease, Right-of-Use Asset | 48,739 | 34,673 | ||||
| Operating Lease, Liability | 50,392 | $ 35,166 | ||||
| HMH Holding BV And Subsidiaries [Member] | Kristiansand Lease [Member] | ||||||
| Lessee, Lease, Description [Line Items] | ||||||
| Operating Lease, Right-of-Use Asset | 9,500 | |||||
| Operating Lease, Liability | $ 9,500 | |||||