Fair value measurement (Tables)

12 Months Ended

Dec. 31, 2024

Fair Value Disclosures [Abstract]

Schedule of Fair Value of Pension Plan Assets by Level within Fair Value Hierarchy

The below fair value tables relate to our TRP pension plan assets (in thousands):

Fair value measurements as of Dec. 31, 2024	Level 1		Level 2		Level 3		Total
Assets:
Cash	$	81	$	—	$	—	$	81
Pension plan investments valued using net asset value as a practical expedient:
Common collective trust - equities								68,146
Common collective trust - fixed income								269,665
Partnership/joint venture interests								10
Total fair value of plan assets							$	337,902

Fair value measurements as of Dec. 31, 2023	Level 1		Level 2		Level 3		Total
Assets:
Cash	$	87	$	—	$	—	$	87
Pension plan investments valued using net asset value as a practical expedient:
Common collective trust - equities								67,314
Common collective trust - fixed income								318,594
Partnership/joint venture interests								113
Total fair value of plan assets							$	386,108