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Certain Balance Sheet Components | 9 Months Ended
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Sep. 30, 2022
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, 2022 |  | December 31, 2021
Trade receivables (net of allowance of $4,506 and $5,730) | $ | 231,998 |  |  | $ | 261,124 |
Unbilled receivables | 34,671 |  |  | 37,335 |
Total accounts receivable, net | $ | 266,669 |  |  | $ | 298,459 |
Allowance for credit losses account activity | Three Months Ended September 30, |  | Nine Months Ended September 30,
In thousands | 2022 |  | 2021 |  | 2022 |  | 2021
Beginning balance | $ | 5,630 |  |  | $ | 1,107 |  |  | $ | 5,730 |  |  | $ | 1,312 |
Provision for (release of) doubtful accounts, net | (1,062) |  |  | 2,164 |  |  | (544) |  |  | 2,122 |
Accounts recovered (written-off), net | (214) |  |  | (440) |  |  | (458) |  |  | (582) |
Effect of change in exchange rates | 152 |  |  | (33) |  |  | (222) |  |  | (54) |
Ending balance | $ | 4,506 |  |  | $ | 2,798 |  |  | $ | 4,506 |  |  | $ | 2,798 |
Inventories |  |  |
In thousands | September 30, 2022 |  | December 31, 2021
Raw materials | $ | 160,000 |  |  | $ | 122,434 |
Work in process | 8,359 |  |  | 7,856 |
Finished goods | 35,253 |  |  | 35,509 |
Total inventories | $ | 203,612 |  |  | $ | 165,799 |
Property, plant, and equipment, net |  |  |
In thousands | September 30, 2022 |  | December 31, 2021
Machinery and equipment | $ | 296,488 |  |  | $ | 314,502 |
Computers and software | 115,822 |  |  | 111,540 |
Buildings, furniture, and improvements | 125,911 |  |  | 131,764 |
Land | 8,221 |  |  | 8,952 |
Construction in progress, including purchased equipment | 20,212 |  |  | 39,527 |
Total cost | 566,654 |  |  | 606,285 |
Accumulated depreciation | (427,886) |  |  | (443,101) |
Property, plant, and equipment, net | $ | 138,768 |  |  | $ | 163,184 |
Depreciation expense | Three Months Ended September 30, |  | Nine Months Ended September 30,
In thousands | 2022 |  | 2021 |  | 2022 |  | 2021
Depreciation expense | $ | 10,948 |  |  | $ | 12,389 |  |  | $ | 31,161 |  |  | $ | 37,338 |

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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 -Publisher FASB -Name Accounting Standards Codification -Topic 210 -URI https://asc.fasb.org/topic&trid=2122208 + Details
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