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Inventories (Tables) | 6 Months Ended
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Jun. 30, 2023
Inventory Disclosure [Abstract] |
Inventories | The components of inventories and related changes in the allowance for excess and obsolete inventories account are as follows:
| June 30, 2023 |  | December 31, 2022
| (in thousands)
Raw materials | $ | 210,937 |  |  | $ | 194,159 |
Work in process | 4,087 |  |  | 3,501 |
Finished goods | 5,665 |  |  | 5,806 |
Total, gross | 220,689 |  |  | 203,466 |
Less: Allowance for excess and obsolete inventories | (5,281) |  |  | (4,527) |
Total, net | $ | 215,408 |  |  | $ | 198,939 |
Inventories (Allowance) |
| Three Months Ended |  | Six Months Ended
| June 30, 2023 |  | June 30, 2022 |  | June 30, 2023 |  | June 30, 2022
Allowance for excess and obsolete inventories: | (in thousands)
Balance, beginning of period | $ | 4,748 |  |  | $ | 2,007 |  |  | $ | 4,527 |  |  | $ | 1,787 |
Provision for (recoveries of) excess and | 794 |  |  | (72) |  |  | 1,458 |  |  | 148 |
obsolete inventories |  |  |  |  |  |  |
Inventories written off | (261) |  |  | (64) |  |  | (704) |  |  | (64) |
Balance, end of period | $ | 5,281 |  |  | $ | 1,871 |  |  | $ | 5,281 |  |  | $ | 1,871 |

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