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v3.23.1

Supplemental balance sheet and cash flow information (inventories and supplies) (Details) - USD ($) $ in Thousands | 3 Months Ended |
--- | --- | ---
Mar. 31, 2023 | Mar. 31, 2022 | Dec. 31, 2022
Inventories and supplies |  |  |
Raw materials | $ 11,326 |  | $ 11,563
Semi-finished goods | 5,973 |  | 7,777
Finished goods | 37,240 |  | 32,938
Supplies | 6,866 |  | 6,389
Reserve for excess and obsolete items | (7,482) | $ (5,379) | (6,400)
Inventories and supplies | 53,923 |  | $ 52,267
Changes in reserve for excess and obsolete items |  |  |
Balance, beginning of year | 6,400 | 5,132 |
Balance, end of period | 7,482 | 5,379 |
Reserves for excess and obsolete items |  |  |
Changes in reserve for excess and obsolete items |  |  |
Amounts charged to expense | 1,334 | 773 |
Write-offs and other | $ (252) | $ (526) |

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