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Supplemental balance sheet and cash flow information (other non-current assets) (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2024 | Jun. 30, 2023 | Dec. 31, 2023
Other non-current assets |  |  |  |
Postretirement benefit plan asset |  | $ 99,163 |  | $ 94,939
Cloud computing arrangements implementation costs |  | 48,124 |  | 59,234
Prepaid product discounts | [1] | 41,390 |  | 40,376
Deferred contract acquisition costs | [2] | 20,513 |  | 21,103
Loans and notes receivable from distributors, net of allowance for credit losses | [3] | 12,081 |  | 12,443
Other |  | 30,074 |  | 23,087
Other non-current assets |  | 251,345 |  | 251,182
Amortization of prepaid product discounts |  | 16,354 | $ 17,173 |
Amortization of deferred contract acquisition costs |  | 6,298 | 5,315 |
Loans and notes receivable, current |  | 1,501 |  | $ 987
Loans and notes receivable from distributors [Member] |  |  |  |
Loans and notes receivable from distributors, allowance for credit losses [Line Items] |  |  |  |
Balance, beginning of year |  | 928 | 1,024 |
Bad debt expense (benefit) |  | 217 | (73) |
Balance, end of period |  | 1,145 | $ 951 |
Write-offs |  | 0 |  |
Recoveries |  | 0 |  |
Loans and notes receivable from distributors, credit quality information |  |  |  |
2024 |  | 967 |  |
2023 |  | 341 |  |
2020 |  | 928 |  |
2019 |  | 340 |  |
Prior |  | 12,151 |  |
Total |  | 14,727 |  |
Loans and notes receivable from distributors [Member] | 1-2 internal grade member [Member] |  |  |  |
Loans and notes receivable from distributors, credit quality information |  |  |  |
2024 |  | 967 |  |
2023 |  | 341 |  |
2020 |  | 928 |  |
2019 |  | 340 |  |
Prior |  | 11,448 |  |
Total |  | 14,024 |  |
Loans and notes receivable from distributors [Member] | 3-4 internal grade [Member] |  |  |  |
Loans and notes receivable from distributors, credit quality information |  |  |  |
2024 |  | 0 |  |
2023 |  | 0 |  |
2020 |  | 0 |  |
2019 |  | 0 |  |
Prior |  | 703 |  |
Total |  | $ 703 |  |
[1] | Amortization of prepaid product discounts was $16,354 for the six months ended June 30, 2024 and $17,173 for the six months ended June 30, 2023.
[2] | Amortization of deferred contract acquisition costs was $6,298 for the six months ended June 30, 2024 and $5,315 for the six months ended June 30, 2023.
[3] | Amount includes the non-current portion of loans and notes receivable. The current portion of these receivables is included in other current assets on the consolidated balance sheets and was $1,501 as of June 30, 2024 and $987 as of December 31, 2023.

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