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Pensions and other postretirement benefit plans - Schedule of Multiemployer Pension Plans (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2025
Dec. 31, 2024
Dec. 31, 2023
Defined Benefit Plans and Other Postretirement Benefit Plans      
Contributions $ 862 $ 1,384 $ 1,480
CWA/ITU Negotiated Pension Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans      
Contributions 21 160 255
GCIU—Employer Retirement Benefit Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans      
Contributions 28 46 41
The Newspaper Guild International Pension Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans      
Contributions 14 9 14
IAM National Pension Plan      
Defined Benefit Plans and Other Postretirement Benefit Plans      
Contributions 74 118 147
Teamsters Pension Trust Fund of Philadelphia and Vicinity      
Defined Benefit Plans and Other Postretirement Benefit Plans      
Contributions 694 998 965
Central Pension Fund of the International Union of Operating Engineers and Participating Employers      
Defined Benefit Plans and Other Postretirement Benefit Plans      
Contributions $ 31 $ 53 $ 58