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Liability for Warranty Returns (Tables) | 9 Months Ended
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Sep. 30, 2023
Product Warranties Disclosures [Abstract] |
Summary of Warranty Expense and Write-off Activity | The warranty expense and write-off activity for the three and nine months ended September 30, 2023 and 2022 are summarized as follows:
|  | Three Months Ended |  |  | Nine Months Ended |
|  | September 30, |  |  | September 30, |
(In thousands) |  | 2023 |  |  | 2022 |  |  | 2023 |  |  | 2022 |
Balance at beginning of period |  | $ | 6,831 |  |  | $ | 4,842 |  |  | $ | 7,196 |  |  | $ | 5,403 |
Plus: Adtran Networks acquisition |  |  | — |  |  |  | 3,756 |  |  |  | — |  |  |  | 3,756 |
Plus: Amounts charged to cost and expenses |  |  | 752 |  |  |  | 616 |  |  |  | 2,289 |  |  |  | 1,727 |
Plus: Foreign currency translation adjustments |  |  | (73 | ) |  |  | — |  |  |  | (33 | ) |  |  | — |
Less: Deductions |  |  | (943 | ) |  |  | (613 | ) |  |  | (2,885 | ) |  |  | (2,285 | )
Balance at end of period |  | $ | 6,567 |  |  | $ | 8,601 |  |  | $ | 6,567 |  |  | $ | 8,601 |

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- Definition Tabular disclosure of the changes in the guarantor's aggregate product warranty liability, including the beginning balance of the aggregate product warranty liability, the aggregate reductions in that liability for payments made (in cash or in kind) under the warranty, the aggregate changes in the liability for accruals related to product warranties issued during the reporting period, the aggregate changes in the liability for accruals related to preexisting warranties (including adjustments related to changes in estimates), and the ending balance of the aggregate product warranty liability. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 460 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 8 -Subparagraph (c) -Publisher FASB -URI https://asc.fasb.org//1943274/2147482425/460-10-50-8 + Details
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