Significant related party transactions (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2026	Jun. 30, 2025	Jun. 30, 2026	Jun. 30, 2025
Purchase of services [Abstract]
Support service fees paid/payable to related corporations	$ 1,878	$ 1,873	$ 3,856	$ 3,744
Rental paid/payable to a related corporation	246	231	494	454
Rendering of services [Abstract]
Management fees received/receivable from related corporations	15	0	78	0
Other transactions with related corporations [Abstract]
Services paid on behalf of/settled on behalf by related corporations	17,240	18,594	35,115	37,582
Purchase and rendering of services to joint venture [Abstract]
Support service fees paid/payable to joint venture	1,170	0	1,170	0
Management fees received/receivable from joint venture	1,430	810	2,873	1,621
Management fees paid/payable to joint venture	1,001	203	1,529	203
Other transactions with joint venture [Abstract]
Interest income received/receivable from joint venture	643	882	1,258	1,720
Services paid on behalf of/settled on behalf by joint venture	(4,147)	(1,928)	(8,968)	(3,814)
Pool arrangements [Abstract]
Revenue distributable/distributed to joint venture	$ 22,017	$ 15,063	$ 43,705	$ 29,175

Interest income received/receivable from joint venture represents the return earned by the company on financing arrangements (such as loans, advances, or deposits) provided to a jointly controlled entity. This income is recognized on an accrual basis, in proportion to the passage of time and applicable interest rate terms, and is presented as finance income in the period earned. Any unpaid amount is recorded as an interest receivable (asset).

No definition available.