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Postretirement benefits
 6 Months Ended
Jun. 30, 2024
Defined Benefit Plans and Other Postretirement Benefit Plans Disclosures [Abstract]  
Postretirement benefits
NOTE 11: POSTRETIREMENT BENEFITS

We have historically provided certain health care benefits for eligible retired U.S. employees. In addition to our retiree health care plan, we also have a U.S. supplemental executive retirement plan. Further information regarding our postretirement
benefit plans can be found under the caption “Note 12: Postretirement Benefits” in the Notes to Consolidated Financial Statements appearing in the 2023 Form 10-K.

Postretirement benefit income is included in other income on the consolidated statements of comprehensive income and consisted of the following components:
Quarter Ended
June 30,		Six Months Ended
June 30,
(in thousands)2024202320242023
Interest cost$435 $496 $871 $993 
Expected return on plan assets(2,099)(1,830)(4,197)(3,660)
Amortization of prior service credit(355)(355)(711)(711)
Amortization of net actuarial losses334 568 667 1,137 
Net periodic benefit income$(1,685)$(1,121)$(3,370)$(2,241)