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Certain Balance Sheet Components | 9 Months Ended
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Sep. 30, 2023
Balance Sheet Related Disclosures [Abstract] |
Certain Balance Sheet Components | Certain Balance Sheet Components A summary of accounts receivable from contracts with customers is as follows:
Accounts receivable, net |  |  |
In thousands | September 30, 2023 |  | December 31, 2022
Trade receivables (net of allowance of $4,643 and $4,863) | $ | 289,637 |  |  | $ | 249,771 |
Unbilled receivables | 28,467 |  |  | 30,664 |
Total accounts receivable, net | $ | 318,104 |  |  | $ | 280,435 |
Allowance for credit losses account activity | Three Months Ended September 30, |  | Nine Months Ended September 30,
In thousands | 2023 |  | 2022 |  | 2023 |  | 2022
Beginning balance | $ | 4,694 |  |  | $ | 5,630 |  |  | $ | 4,863 |  |  | $ | 5,730 |
Provision for (release of) doubtful accounts, net | 76 |  |  | (1,062) |  |  | 37 |  |  | (544) |
Accounts written-off, net | (60) |  |  | (214) |  |  | (304) |  |  | (458) |
Effect of change in exchange rates | (67) |  |  | 152 |  |  | 47 |  |  | (222) |
Ending balance | $ | 4,643 |  |  | $ | 4,506 |  |  | $ | 4,643 |  |  | $ | 4,506 |
Inventories |  |  |
In thousands | September 30, 2023 |  | December 31, 2022
Raw materials | $ | 216,316 |  |  | $ | 182,118 |
Work in process | 12,606 |  |  | 8,386 |
Finished goods | 47,177 |  |  | 38,197 |
Total inventories | $ | 276,099 |  |  | $ | 228,701 |
Property, plant, and equipment, net |  |  |
In thousands | September 30, 2023 |  | December 31, 2022
Machinery and equipment | $ | 312,529 |  |  | $ | 306,699 |
Computers and software | 123,198 |  |  | 119,670 |
Buildings, furniture, and improvements | 129,755 |  |  | 130,301 |
Land | 8,513 |  |  | 8,566 |
Construction in progress, including purchased equipment | 20,634 |  |  | 19,403 |
Total cost | 594,629 |  |  | 584,639 |
Accumulated depreciation | (464,915) |  |  | (444,516) |
Property, plant, and equipment, net | $ | 129,714 |  |  | $ | 140,123 |
Depreciation expense | Three Months Ended September 30, |  | Nine Months Ended September 30,
In thousands | 2023 |  | 2022 |  | 2023 |  | 2022
Depreciation expense | $ | 8,982 |  |  | $ | 10,948 |  |  | $ | 27,580 |  |  | $ | 31,161 |

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- Definition The entire disclosure for supplemental balance sheet disclosures, including descriptions and amounts for assets, liabilities, and equity. + References Reference 1: http://www.xbrl.org/2009/role/commonPracticeRef -Topic 210 -Name Accounting Standards Codification -Publisher FASB -URI https://asc.fasb.org//210/tableOfContent + Details
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