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v3.23.2

Supplemental balance sheet and cash flow information (inventories and supplies) (Details) - USD ($) $ in Thousands | 6 Months Ended |
--- | --- | ---
Jun. 30, 2023 | Jun. 30, 2022 | Dec. 31, 2022
Inventories and supplies |  |  |
Raw materials | $ 12,028 |  | $ 11,563
Semi-finished goods | 6,098 |  | 7,777
Finished goods | 37,836 |  | 32,938
Supplies | 7,062 |  | 6,389
Reserve for excess and obsolete items | (8,125) | $ (5,437) | (6,400)
Inventories and supplies | 54,899 |  | $ 52,267
Changes in reserve for excess and obsolete items |  |  |
Balance, beginning of year | 6,400 | 5,132 |
Balance, end of period | 8,125 | 5,437 |
Reserves for excess and obsolete items |  |  |
Changes in reserve for excess and obsolete items |  |  |
Amounts charged to expense | 2,151 | 1,516 |
Write-offs and other | $ (426) | $ (1,211) |

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