Basis of presentation (Details) - USD ($) $ in Thousands	Jun. 29, 2025	Dec. 31, 2024	Jun. 30, 2024	Dec. 31, 2023
Organization, Consolidation and Presentation of Financial Statements [Abstract]
Cash and cash equivalents	$ 253,697	$ 290,188
Restricted cash equivalents in other current assets	14,700	14,700
Restricted cash equivalents in other assets	15,525	22,762
Total cash, cash equivalents and restricted cash equivalents	$ 283,922	$ 327,650	$ 238,567	$ 222,848