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Commitments and Contingencies - Additional Information (Detail) - USD ($) $ in Millions | 9 Months Ended |
--- | --- | ---
Sep. 30, 2022 | Dec. 31, 2021
Contingencies And Commitments [Line Items] |  |
Commitments related to performance bonds | $ 21.1 | $ 22.9
Commitments related to performance bonds expiration month and year | 2025-04 |
Purchase commitments | $ 454.1 |
Commitments towards private equity funds | 4.9 |
Investment Commitments [Member] |  |
Contingencies And Commitments [Line Items] |  |
Aggregate investment committed in private equity funds | $ 5.0 |

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- Definition Commitments related to performance bonds. + References No definition available. + Details
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Namespace Prefix: | adtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Definition Commitments related to performance bonds expiration month and year. + References No definition available. + Details
Name: | adtn_CommitmentsRelatedToPerformanceBondsExpirationMonthAndYear
Namespace Prefix: | adtn_
Data Type: | xbrli:gYearMonthItemType
Balance Type: | na
Period Type: | duration

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- Definition Amount of contributions made that have been applied to private equity fund commitments. + References No definition available. + Details
Name: | adtn_CommitmentsTowardsPrivateEquityFunds
Namespace Prefix: | adtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Contingencies and commitments. + References No definition available. + Details
Name: | adtn_ContingenciesAndCommitmentsLineItems
Namespace Prefix: | adtn_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Definition Cost of the investment. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Publisher FASB -Name Accounting Standards Codification -Topic 946 -SubTopic 210 -Section 50 -Paragraph 6 -Subparagraph (b) -URI https://asc.fasb.org/extlink&oid=99383244&loc=d3e12121-115841 + Details
Name: | us-gaap_InvestmentOwnedAtCost
Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | debit
Period Type: | instant

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- Definition Minimum amount of purchase arrangement in which the entity has agreed to expend funds to procure goods or services from a supplier. + References No definition available. + Details
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Namespace Prefix: | us-gaap_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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- Details
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Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |