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Derivative Instruments and Hedging Activities - Additional Information (Detail) | Dec. 31, 2017 USD ($)
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Forward Contracts [Member] |
Derivative [Line Items] |
Derivative, outstanding amount | $ 0

X
- Definition Derivative outstanding amount. + References No definition available. + Details
Name: | adtn_DerivativeOutstandingAmount
Namespace Prefix: | adtn_
Data Type: | xbrli:monetaryItemType
Balance Type: | credit
Period Type: | instant

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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
Name: | us-gaap_DerivativeLineItems
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

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- Details
Name: | us-gaap_FinancialInstrumentAxis=us-gaap_ForwardContractsMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |