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Derivative Instruments and Hedging Activities - Additional Information (Detail)	Dec. 31, 2017 USD ($)
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

X

- 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

X

- Details

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