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Inventory - Additional Information (Detail) - USD ($) $ in Thousands | 12 Months Ended
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Dec. 31, 2024 | Dec. 31, 2023 | Dec. 31, 2022
Inventory [Line Items] |  |  |
Inventory renegotiated charges | $ (75,171) | $ (20,537) | $ 73,237
Inventory write down | 4,135 | 24,313 |
Business Efficiency Program |  |  |
Inventory [Line Items] |  |  |
Strategy shift charges | 8,600 |  |
Inventory write down | 4,100 | $ 24,300 |
Other charges | $ 4,500 |  |

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- Definition Other charges. + References No definition available. + Details
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Balance Type: | debit
Period Type: | duration

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- Definition Strategy shift charges. + References No definition available. + Details
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Namespace Prefix: | adtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | duration

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- Definition The increase (decrease) during the reporting period in the aggregate value of all inventory held by the reporting entity, associated with underlying transactions that are classified as operating activities. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 45 -Paragraph 28 -Subparagraph (a) -SubTopic 10 -Topic 230 -Publisher FASB -URI https://asc.fasb.org/1943274/2147482740/230-10-45-28 + Details
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- Definition Line items represent financial concepts included in a table. These concepts are used to disclose reportable information associated with domain members defined in one or many axes to the table. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
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- Definition Amount of loss from reductions in inventory due to subsequent measurement adjustments, including, but not limited to, physical deterioration, obsolescence, or changes in price levels. + References Reference 1: http://www.xbrl.org/2003/role/disclosureRef -Topic 330 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Publisher FASB -URI https://asc.fasb.org/1943274/2147483080/330-10-50-2 + Details
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Period Type: | duration

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- Details
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Balance Type: |
Period Type: |