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Details of Selected Balance Sheet Accounts | 3 Months Ended
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Mar. 31, 2023
Details of Selected Balance Sheet Accounts [Abstract] |
Details of Selected Balance Sheet Accounts | Details of Selected Balance Sheet Accounts Additional information regarding selected balance sheet accounts as of March 31, 2023 and December 31, 2022 is presented below (in thousands):
| March 31, 2023 |  | December 31, 2022
Accounts receivable, net: |  |  |
Trade | $ | 163,360 |  |  | $ | 145,540 |
Unbilled revenue | 27,849 |  |  | 29,679 |
Contract assets | 27,731 |  |  | 42,599 |
Other | 6,621 |  |  | 6,177 |
Total accounts receivable | 225,561 |  |  | 223,995 |
Allowance for doubtful accounts | (5,359) |  |  | (5,226) |
| $ | 220,202 |  |  | $ | 218,769 |
Allowance for doubtful accounts as a percentage of total accounts receivable | 2 | % |  | 2 | %
| March 31, 2023 |  | December 31, 2022
Deferred revenue (contract liabilities) | $ | 48,969 |  |  | $ | 44,790 |
As of March 31, 2023, accounts receivable, net in the United States and the United Kingdom represented 75% and 12%, respectively, of the total. No other country or single customer accounted for more than 10% of the Company's total accounts receivable as of March 31, 2023. For the three months ended March 31, 2023, the $14.9 million net decrease in contract assets was attributable to $27.8 million transferred to accounts receivable during the period, which was partially offset by $12.9 million in revenue recognized. Deferred revenue (contract liabilities) increased by $4.2 million in the first three months of 2023, reflecting $13.2 million in new customer billings which were not recognized as revenue during the period, partially offset by the recognition of $9.0 million of revenue that was deferred at the beginning of the period. The following provides a summary of activity in the allowance for doubtful accounts for the three months ended March 31, 2023 and 2022 (in thousands):
| Three Months Ended March 31,
| 2023 |  | 2022
Allowance for doubtful accounts – January 1 | $ | 5,226 |  |  | $ | 4,471 |
Provisions | 133 |  |  | 943 |
Write-offs | (21) |  |  | (635) |
Other | 21 |  |  | — |
Allowance for doubtful accounts – March 31 | $ | 5,359 |  |  | $ | 4,779 |
| March 31, 2023 |  | December 31, 2022
Inventories, net: |  |  |
Finished goods and purchased products | $ | 95,094 |  |  | $ | 90,443 |
Work in process | 31,632 |  |  | 32,079 |
Raw materials | 108,058 |  |  | 97,817 |
Total inventories | 234,784 |  |  | 220,339 |
Allowance for excess or obsolete inventory | (38,506) |  |  | (37,681) |
| $ | 196,278 |  |  | $ | 182,658 |
|  |  | March 31, 2023 |  | December 31, 2022
Property, plant and equipment, net: |  |  |  |  |  |  |  |  |
Property, plant and equipment |  | $ | 1,139,138 |  |  | $ | 1,128,834 |
Accumulated depreciation |  | (833,004) |  |  | (824,999) |
|  |  |  |  |  |  | $ | 306,134 |  |  | $ | 303,835 |
For the three months ended March 31, 2023 and 2022, depreciation expense was $11.0 million and $12.7 million, respectively.
| March 31, 2023 |  | December 31, 2022
Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount |  | Gross Carrying Amount |  | Accumulated Amortization |  | Net Carrying Amount
Other intangible assets: |  |  |  |  |  |  |  |  |  |  |
Customer relationships | $ | 141,259 |  |  | $ | 49,851 |  |  | $ | 91,408 |  |  | $ | 141,179 |  |  | $ | 47,629 |  |  | $ | 93,550 |
Patents/Technology/Know-how | 69,925 |  |  | 30,537 |  |  | 39,388 |  |  | 69,830 |  |  | 29,214 |  |  | 40,616 |
Tradenames and other | 52,497 |  |  | 17,620 |  |  | 34,877 |  |  | 52,488 |  |  | 16,856 |  |  | 35,632 |
| $ | 263,681 |  |  | $ | 98,008 |  |  | $ | 165,673 |  |  | $ | 263,497 |  |  | $ | 93,699 |  |  | $ | 169,798 |
For the three months ended March 31, 2023 and 2022, amortization expense was $4.3 million and $5.2 million, respectively.
| March 31, 2023 |  | December 31, 2022
Other noncurrent assets: |  |  |
Deferred compensation plan | $ | 18,349 |  |  | $ | 17,551 |
Deferred financing costs(1) | — |  |  | 1,893 |
Deferred income taxes | 1,518 |  |  | 1,517 |
Other | 4,639 |  |  | 4,726 |
| $ | 24,506 |  |  | $ | 25,687 |
____________________ (1)Unamortized deferred financing costs are presented as an offset to outstanding borrowing under the ABL Facility as of March 31, 2023.
| March 31, 2023 |  | December 31, 2022
Accrued liabilities: |  |  |
Accrued compensation | $ | 15,882 |  |  | $ | 33,659 |
Accrued taxes, other than income taxes | 3,175 |  |  | 1,865 |
Insurance liabilities | 4,976 |  |  | 4,640 |
Accrued interest | 3,324 |  |  | 1,784 |
Accrued commissions | 2,432 |  |  | 2,302 |
Other | 5,625 |  |  | 4,807 |
| $ | 35,414 |  |  | $ | 49,057 |

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- Definition Details of Selected Balance Sheet Accounts [Abstract] + References No definition available. + Details
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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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