XML 67 R53.htm IDEA: XBRL DOCUMENT
v3.22.0.1

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% |  |

X
- Definition Business acquisition equity interest issued or issuable for each share of acquired entity. + References No definition available. + Details
Name: | adtn_BusinessAcquisitionEquityInterestIssuedOrIssuableForEachShareOfAcquiredEntity
Namespace Prefix: | adtn_
Data Type: | xbrli:sharesItemType
Balance Type: | na
Period Type: | duration

X
- Definition Date when the business acquisition agreement was executed, in YYYY-MM-DD format. + References No definition available. + Details
Name: | us-gaap_BusinessAcquisitionDateOfAcquisitionAgreement1
Namespace Prefix: | us-gaap_
Data Type: | xbrli:dateItemType
Balance Type: | na
Period Type: | duration

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

X
- 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
Name: | us-gaap_BusinessAcquisitionPercentageOfVotingInterestsAcquired
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:percentItemType
Balance Type: | na
Period Type: | instant

X
- Details
Name: | dei_LegalEntityAxis=adtn_AdtranIncorporationMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | us-gaap_EquityInterestIssuedOrIssuableByTypeAxis=us-gaap_CommonStockMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | dei_LegalEntityAxis=adtn_AdvaOpticalNetworkingSeMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

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

X
- Details
Name: | us-gaap_SubsequentEventTypeAxis=us-gaap_SubsequentEventMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |

X
- Details
Name: | srt_RangeAxis=srt_MinimumMember
Namespace Prefix: |
Data Type: | na
Balance Type: |
Period Type: |