Business acquisition equity interest issued or issuable for each share of acquired entity.

No definition available.

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Namespace Prefix:	adtn_
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Period Type:	duration

- Definition

Date when the business acquisition agreement was executed, in YYYY-MM-DD format.

+ References

No definition available.

+ Details

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Namespace Prefix:	us-gaap_
Data Type:	xbrli:dateItemType
Balance Type:	na
Period Type:	duration

- 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_BusinessAcquisitionLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

- Definition

Percentage of voting equity interests acquired at the acquisition date in the business combination.

+ References

Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 805
-SubTopic 10
-Section 50
-Paragraph 2
-Subparagraph (c)
-URI http://asc.fasb.org/extlink&oid=79982066&loc=d3e1392-128463

+ Details

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Namespace Prefix:	us-gaap_
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Balance Type:	na
Period Type:	instant

- Details

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- Details

Name:	us-gaap_EquityInterestIssuedOrIssuableByTypeAxis=us-gaap_CommonStockMember
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Data Type:	na
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- Details

Name:	dei_LegalEntityAxis=adtn_AdvaOpticalNetworkingSeMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

Name:	us-gaap_BusinessAcquisitionAxis=adtn_AcornHoldcoIncorporationMember
Namespace Prefix:
Data Type:	na
Balance Type:
Period Type:

- Details

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- Details

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Business Combination Agreement - Additional Information (Detail) - shares	Aug. 30, 2021	Feb. 14, 2022	Jan. 26, 2022
ADTRAN INC [Member] \| Common Stock [Member]
Business Acquisition [Line Items]
Number of shares issuable for each share of acquired entity	1
ADVA Optical Networking SE, [Member] \| Common Stock [Member]
Business Acquisition [Line Items]
Number of shares issuable for each share of acquired entity	0.8244
Acorn HoldCo, Inc., [Member]
Business Acquisition [Line Items]
Business combination date of agreement	Aug. 30, 2021
Acorn HoldCo, Inc., [Member] \| Subsequent Event [Member]
Business Acquisition [Line Items]
Percentage of ownership interest acquired		66.00%
Acorn HoldCo, Inc., [Member] \| Subsequent Event [Member] \| Minimum [Member]
Business Acquisition [Line Items]
Percentage of ownership interest acquired			60.00%
Acorn HoldCo, Inc., [Member] \| ADTRAN INC [Member]
Business Acquisition [Line Items]
Percentage of ownership interest acquired	54.00%
Acorn HoldCo, Inc., [Member] \| ADVA Optical Networking SE, [Member]
Business Acquisition [Line Items]
Percentage of ownership interest acquired	46.00%